text:
MAC address
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This article is about a type of network address. For the Apple computers, see Macintosh. For other similar terms, see Mac.
Label of a UMTS router with MAC addresses for LAN and WLAN modules
A media access control address (MAC address) of a computer is a unique identifier assigned to network interfaces for communications at the data link layer of a network segment. MAC addresses are used as a network address for most IEEE 802 network technologies, including Ethernet and Wi-Fi. Logically, MAC addresses are used in the media access control protocol sublayer of the OSI reference model.
MAC addresses are most often assigned by the manufacturer of a network interface controller (NIC) and are stored in its hardware, such as the card's read-only memory or some other firmware mechanism. If assigned by the manufacturer, a MAC address usually encodes the manufacturer's registered identification number and may be referred to as the burned-in address (BIA). It may also be known as an Ethernet hardware address (EHA), hardware address or physical address (not to be confused with a memory physical address). This can be contrasted to a programmed address, where the host device issues commands to the NIC to use an arbitrary address.
A network node may have multiple NICs and each NIC must have a unique MAC address. Sophisticated network equipment such as a multilayer switch or router may require one or more permanently assigned MAC addresses.
MAC addresses are formed according to the rules of one of three numbering name spaces managed by the Institute of Electrical and Electronics Engineers (IEEE): MAC-48, EUI-48, and EUI-64. The IEEE claims trademarks on the names EUI-48[1] and EUI-64,[2] in which EUI is an abbreviation for Extended Unique Identifier.
Contents
[hide]
1 Address details
1.1 Universal vs. local
1.2 Unicast vs. multicast
2 Applications
3 Usage in hosts
4 Spying
5 Notational conventions
5.1 Bit-reversed notation
6 See also
7 References
8 External links
Address details[edit]
The original IEEE 802 MAC address comes from the original Xerox Ethernet addressing scheme.[3] This 48-bit address space contains potentially 248 or 281,474,976,710,656 possible MAC addresses.
The distinction between EUI-48 and MAC-48 identifiers is purely nominal: MAC-48 is used for network hardware; EUI-48 is used to identify other devices and software. (Thus, by definition, an EUI-48 is not in fact a "MAC address", although it is syntactically indistinguishable from one and assigned from the same numbering space.)
The IEEE now considers the label MAC-48 to be an obsolete term, previously used to refer to a specific type of EUI-48 identifier used to address hardware interfaces within existing 802-based networking applications, and thus not to be used in the future. Instead, the proprietary term EUI-48 should be used for this purpose.
In addition, the EUI-64 numbering system encompasses both MAC-48 and EUI-48 identifiers by a simple translation mechanism.[2] To convert a MAC-48 into an EUI-64, copy the OUI, append the two octets FF-FF and then copy the organization-specified extension identifier. To convert an EUI-48 into an EUI-64, the same process is used, but the sequence inserted is FF-FE. In both cases, the process can be trivially reversed when necessary. Organizations issuing EUI-64s are cautioned against issuing identifiers that could be confused with these forms. The IEEE has a target lifetime of 100 years for applications using MAC-48 space, but encourages adoption of EUI-64s instead.[4]
IPv6 — one of the most prominent standards that uses a Modified EUI-64 — treats MAC-48 as EUI-48 instead (as it is chosen from the same address pool) and toggles the U/L bit (as this makes it easier to type locally assigned IPv6 addresses based on the Modified EUI-64). This results in extending MAC addresses (such as IEEE 802 MAC address) to Modified EUI-64 using only FF-FE (and never FF-FF) and with the U/L bit inverted.[5]
An Individual Address Block (IAB) was a 24-bit OUI managed by the IEEE Registration Authority, followed by 12 IEEE-provided bits (identifying the organization), and 12 bits for the owner to assign to individual devices. An IAB is ideal for organizations requiring fewer than 4097 unique 48-bit numbers (EUI-48). IAB's have been replaced with 12-bit "MA-S" address blocks.[6]
Universal vs. local[edit]
Addresses can either be universally administered addresses (UAA) or locally administered addresses (LAA). A universally administered address is uniquely assigned to a device by its manufacturer. The first three octets (in transmission order) identify the organization that issued the identifier and are known as the Organizationally Unique Identifier (OUI).[4] The remainder of the address (three octets for MAC-48 and EUI-48 or five for EUI-64) are assigned by that organization in nearly any manner they please, subject to the constraint of uniqueness. A locally administered address is assigned to a device by a network administrator, overriding the burned-in address.
Universally administered and locally administered addresses are distinguished by setting the second-least-significant bit of the first octet of the address. This bit is also referred to as the U/L bit, short for Universal/Local, which identifies how the address is administered. If the bit is 0, the address is universally administered. If it is 1, the address is locally administered. In the example address 06-00-00-00-00-00 the first octet is 06 (hex), the binary form of which is 00000110, where the second-least-significant bit is 1. Therefore, it is a locally administered address.[7] Consequently, this bit is 0 in all OUIs.
Unicast vs. multicast[edit]
If the least significant bit of the first octet of an address is set to 0 (zero), the frame is meant to reach only one receiving NIC.[8] This type of transmission is called unicast. A unicast frame is transmitted to all nodes within the collision domain. In a modern wired setting the collision domain usually is the length of the Ethernet cable between two network cards. In a wireless setting, the collision domain is as far as the radio transmitter can reach. A switch will forward a unicast frame through all of its ports (except for the port that originated the frame) if the switch has no knowledge of which port leads to that MAC address, or just to the proper port if it does have knowledge.[9][10][not in citation given] Only the node with the matching hardware MAC address will accept the frame; network frames with non-matching MAC-addresses are ignored, unless the device is in promiscuous mode.
If the least significant bit of the first octet is set to 1, the frame will still be sent only once; however, NICs will choose to accept it based on criteria other than the matching of a MAC address: for example, based on a configurable list of accepted multicast MAC addresses. This is called multicast addressing.
The IEEE has built in several special address types to allow more than one network interface card to be addressed at one time:
Packets sent to the broadcast address, all one bits, are received by all stations on a local area network. In hexadecimal the broadcast address would be FF:FF:FF:FF:FF:FF. A broadcast frame is flooded and is forwarded to and accepted by all other nodes.
Packets sent to a multicast address are received by all stations on a LAN that have been configured to receive packets sent to that address.
Functional addresses identify one or more Token Ring NICs that provide a particular service, defined in IEEE 802.5.
These are all examples of group addresses, as opposed to individual addresses; the least significant bit of the first octet of a MAC address distinguishes individual addresses from group addresses. That bit is set to 0 in individual addresses and set to 1 in group addresses. Group addresses, like individual addresses, can be universally administered or locally administered.
Applications[edit]
This section possibly contains original research. Please improve it by verifying the claims made and adding inline citations. Statements consisting only of original research should be removed. (January 2017) (Learn how and when to remove this template message)
The following network technologies use the MAC-48 identifier format:
Ethernet
802.11 wireless networks
Bluetooth
IEEE 802.5 token ring
most other IEEE 802 networks
Fiber Distributed Data Interface (FDDI)
Asynchronous Transfer Mode (ATM), switched virtual connections only, as part of an NSAP address
Fibre Channel and Serial Attached SCSI (as part of a World Wide Name)
The ITU-T G.hn standard, which provides a way to create a high-speed (up to 1 gigabit/s) local area network using existing home wiring (power lines, phone lines and coaxial cables). The G.hn Application Protocol Convergence (APC) layer accepts Ethernet frames that use the MAC-48 format and encapsulates them into G.hn Medium Access Control Service Data Units (MSDUs).
Every device that connects to an IEEE 802 network (such as Ethernet and WiFi) has a MAC-48 address. Common networked consumer devices such as PCs, smartphones and tablet computers use MAC-48 addresses.
EUI-64 identifiers are used in:
IEEE 1394 (FireWire)
IPv6 (Modified EUI-64 as the least-significant 64 bits of a unicast network address or link-local address when stateless autoconfiguration is used)
ZigBee / 802.15.4 / 6LoWPAN wireless personal-area networks
Usage in hosts[edit]
On broadcast networks, such as Ethernet, the MAC address is expected to uniquely identify each node on that segment and allows frames to be marked for specific hosts. It thus forms the basis of most of the link layer (OSI Layer 2) networking upon which upper layer protocols rely to produce complex, functioning networks.
Although intended to be a permanent and globally unique identification, it is possible to change the MAC address on most modern hardware. Changing MAC addresses is necessary in network virtualization. It can also be used in the process of exploiting security vulnerabilities. This is called MAC spoofing.
In IP networks, the MAC address of an interface can be queried given the IP address using the Address Resolution Protocol (ARP) for Internet Protocol Version 4 (IPv4) or the Neighbor Discovery Protocol (NDP) for IPv6. In this way, ARP or NDP is used to relate IP addresses (OSI layer 3) to Ethernet MAC addresses (OSI layer 2).
Spying[edit]
According to Edward Snowden, the National Security Agency has a system that tracks the movements of everyone in a city by monitoring the MAC addresses of their electronic devices.[11] As a result of users being trackable by their devices' MAC addresses, Apple has started using random MAC addresses in their iOS line of devices while scanning for networks.[12] If random MAC addresses are not used, researchers have confirmed that it is possible to link a real identity to a particular wireless MAC address.[13]
Many network interfaces (including wireless ones) support changing their MAC address. The configuration is specific to the operating system. On most Unix-like systems, the ifconfig command may be used to add and remove "link" (Ethernet MAC family) address aliases. For instance, the "active" ifconfig directive may then be used on NetBSD to specify which of the attached addresses to activate.[14] Hence, various configuration scripts and utilities allow to randomize the MAC address at boot or network connection time.
Using wireless access points in SSID-hidden mode (see network cloaking), a mobile wireless device may not only disclose its own MAC address when traveling, but even the MAC addresses associated to SSIDs the device has already connected to, if they are configured to send these as part of probe request packets. Alternative modes to prevent this include configuring access points to be either in beacon-broadcasting mode, or probe-response with SSID mode. In these modes, probe requests may be unnecessary, or sent in broadcast mode without disclosing the identity of previously-known networks.[15]
Notational conventions[edit]
The standard (IEEE 802) format for printing MAC-48 addresses in human-friendly form is six groups of two hexadecimal digits, separated by hyphens (-) in transmission order (e.g. 01-23-45-67-89-ab). This form is also commonly used for EUI-64 (e.g. 01-23-45-67-89-ab-cd-ef).[16] Other conventions include six groups of two hexadecimal digits separated by colons (:) (e.g. 01:23:45:67:89:ab), and three groups of four hexadecimal digits separated by dots (.) (e.g. 0123.4567.89ab); again in transmission order.[17]
Bit-reversed notation[edit]
The standard notation, also called canonical format, for MAC addresses is written in transmission bit order with the least significant bit transmitted first, as seen in the output of the ifconfig, iproute2, and ipconfig commands, for example.
However, since IEEE 802.3 (Ethernet) and IEEE 802.4 (Token Bus) send the bytes (octets) over the wire, left-to-right, with least significant bit in each byte first, while IEEE 802.5 (Token Ring) and IEEE 802.6 send the bytes over the wire with the most significant bit first, confusion may arise when an address in the latter scenario is represented with bits reversed from the canonical representation. For example, an address in canonical form 12-34-56-78-9A-BC would be transmitted over the wire as bits 01001000 00101100 01101010 00011110 01011001 00111101 in the standard transmission order (least significant bit first). But for Token Ring networks, it would be transmitted as bits 00010010 00110100 01010110 01111000 10011010 10111100 in most-significant-bit first order. The latter might be incorrectly displayed as 48-2C-6A-1E-59-3D. This is referred to as bit-reversed order, non-canonical form, MSB format, IBM format, or Token Ring format, as explained in RFC 2469.
See also[edit]
Hot Standby Router Protocol
IPv6
LAN switching
Organizationally Unique Identifier
Network management
NSAP address, another endpoint addressing scheme
Sleep Proxy Service, which may spoof another device's MAC address during certain periods
Transparent bridging
Virtual Router Redundancy Protocol
References[edit]
Jump up ^ "Guidelines for 48-Bit Global Identifier (EUI-48)" (PDF). IEEE Standards Association. IEEE. Retrieved 16 April 2015.
^ Jump up to: a b "Guidelines for 64-Bit Global Identifier (EUI-64)" (PDF). IEEE Standards Association. IEEE. Retrieved 16 April 2015.
Jump up ^ IEEE Std 802-2001 (PDF). The Institute of Electrical and Electronics Engineers, Inc. (IEEE). 2002-02-07. p. 19. ISBN 0-7381-2941-0. Retrieved 2011-09-08. The universal administration of LAN MAC addresses began with the Xerox Corporation administering Block Identifiers (Block IDs) for Ethernet addresses.
^ Jump up to: a b "Guidelines for use of the 24-bit Organizationally Unique Identifiers (OUI)" (PDF). IEEE-SA. Retrieved 2011-09-07.
Jump up ^ "IANA Considerations and IETF Protocol Usage for IEEE 802 Parameters". IETF. September 2008. RFC 5342  . Missing or empty |url= (help); |access-date= requires |url= (help)
Jump up ^ IEEE-RA. "What is an Individual Address Block?". Retrieved 2016-06-16.
Jump up ^ "Standard Group MAC Addresses: A Tutorial Guide" (PDF). IEEE-SA. Retrieved 2011-09-07.
Jump up ^ "Guidelines for Fibre Channel Use of the Organizationally Unique Identifier (OUI)" (PDF). IEEE-SA. Retrieved 2011-09-08.
Jump up ^ "Overview of Layer 2 Switched Networks and Communication | Getting Started with LANs | Cisco Support Community | 5896 | 68421". supportforums.cisco.com. Retrieved 2016-05-17.
Jump up ^ MAC Table
Jump up ^ Bamford, James. "The Most Wanted Man in the World". Wired. p. 4. Retrieved 2014-12-01.
Jump up ^ Mamiit, Aaron (2014-06-12). "Apple Implements Random MAC Address on iOS 8. Goodbye, Marketers". Tech Times. Retrieved 2014-12-01.
Jump up ^ Cunche, Mathieu. "I know your MAC Address: Targeted tracking of individual using Wi-Fi" (PDF). 2013. Retrieved 19 December 2014.
Jump up ^ "ifconfig(8) manual page". Retrieved 16 October 2016.
Jump up ^ "Hidden network no beacons". security.stackexchange.com. Retrieved 16 October 2016.
Jump up ^ "Guidelines for Use of EUI, OUI, and CID" (PDF). IEEE. Retrieved 2017-09-07.
Jump up ^ "Agentless Host Configuration Scenario". Configuration Guide for Cisco Secure ACS 4.2. Cisco. February 2008. Retrieved 2015-09-19. You can enter the MAC address in the following formats for representing MAC-48 addresses in human-readable form: six groups of two hexadecimal digits, separated by hyphens (-) in transmission order,[...]six groups of two separated by colons (:),[...]three groups of four hexadecimal digits separated by dots (.)...
External links[edit]
Wikibooks has a book on the topic of: Changing Your MAC Address
IEEE Registration Authority Tutorials
IEEE Public OUI and Company_id Assignment lookup
IEEE Public IAB list
IEEE Public OUI list
IANA Considerations and IETF Protocol Usage for IEEE 802 Parameters
IANA list of Ethernet Numbers
Wireshark's MAC address list
Retrieved from "https://en.wikipedia.org/w/index.php?title=MAC_address&oldid=802674643"
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Indefinite leave to remain
From Wikipedia, the free encyclopedia
Jump to: navigation, search
British citizenship and
British nationality law
Introduction
British nationality law
History
Citizens of the Republic of Ireland
in the United Kingdom
Classes of British national
status and other status
British citizens
British subjects
(under the British Nationality Act 1981)
British Overseas Territories citizens
British Nationals (Overseas)
British Overseas citizens
British Protected Persons
Commonwealth citizens
in the United Kingdom
See also
Right of abode
Belonger status
(in certain British Overseas Territories
and formerly certain former British Dependent territories)
Acts
British Nationality Act 1948
Ireland Act 1949
Immigration Act 1971
British Nationality Act 1981
British Nationality (Falkland Islands) Act 1983
British Overseas Territories Act 2002
v
t
e
Indefinite leave to remain (ILR) or permanent residency (PR) is an immigration status granted to a person who does not hold the right of abode in the United Kingdom (UK), but who has been admitted to the UK without any time limit on his or her stay and who is free to take up employment or study, without restriction. When indefinite leave is granted to persons outside the United Kingdom it is known as indefinite leave to enter (ILE).
A person who has indefinite leave to remain, the right of abode or Irish citizenship has settled status if resident in the United Kingdom (all full British citizens have the right of abode).
Indefinite leave is not a permanent status. It can lapse where the holder has stayed outside the United Kingdom for a continuous period of more than two years.[1]
Settled status is central to British nationality law, as the most usual route to naturalisation or registration as a British citizen requires that the applicant be settled in the UK. Settled status is also important where a child of non-British citizen parents is born in the UK, as unless at least one parent has settled status the child will not automatically be a British citizen.
Contents
[hide]
1 Advantages
1.1 Acquisition of British citizenship
1.2 Children born in the UK
1.3 Public funds
1.4 Home student status
1.5 Right to stand in elections
2 Acquisition of ILR
2.1 No residence
2.2 2 years' residence
2.3 4 years' residence
2.4 5 years' residence
2.5 6 years' residence
2.6 10 years' residence
2.7 17 years' residence
2.8 19–22.5 years' residence
2.9 30 years' residence
2.10 Outside the Immigration Rules
3 Costs
4 Citizens of EEA member states
5 Immigration rule changes
5.1 HC 1016
5.2 HC 398
5.3 HC 194
6 See also
7 References
8 External links
Advantages[edit]
Acquisition of British citizenship[edit]
Main article: British nationality law
Holders of ILR may apply for British citizenship if they have held ILR for twelve months or longer, are over 18 and have been living in the United Kingdom for the last five years.
There are seven requirements for naturalisation. The applicant:-
must be aged 18 or over.
must be of sound mind.
must intend to continue living in the UK, or to continue in Crown service, the service of an international organisation of which the UK is a member, or the service of a company or association established in the UK.
must be able to communicate in English, Welsh or Scottish Gaelic to an acceptable degree.
must have sufficient knowledge of life in the UK.
must be of good character.
must meet the residential requirements.
There are several residential requirements. The applicant must:-
have been resident in the UK for at least five years (this is known as the residential qualifying period); and
were present in the UK five years before the date of the application; and
not have spent more than 450 days outside the UK during the five-year period; and
not have spent more than 90 days outside the UK in the last 12 months of the five-year period; and
not have been in breach of the Immigration Rules at any stage during the five-year period.
See "Standard Requirements", April 2010.
Alternatively, there is a simpler procedure for holders of ILR applying for British citizenship if they are married to a British citizen. The residential requirements for those falling into this category need only hold ILR on the day they apply for British citizenship, but must also:-
have been resident in the United Kingdom for at least three years (this is known as the residential qualifying period); and
were present in the United Kingdom three years before the date of the application; and
have not spent more than 270 days outside the United Kingdom during the three-year period; and
have not spent more than 90 days outside the United Kingdom in the last 12 months of the three-year period; and
have not been in breach of the immigration rules at any stage during the three-year period.
See "Spouse or Civil Partner of citizen", April 2010.
Other people aged over 18, who hold another form of British nationality and employees (and their husband, wife or civil partner) of the crown, civil service or designated service outside the United Kingdom may instead apply for registration, which is a simpler process than naturalisation.
Children born in the UK[edit]
A child born in the United Kingdom after 1983 to persons who are not British citizens will not automatically be a British citizen.
Prior to 1 July 2006, only a legitimate child (born to parents who are married to each other) could automatically derive British citizenship from the father, if the father was a British citizen or "settled" in the United Kingdom. However, if the parents are not married when the child is born in the United Kingdom, but then get married, and the marriage legitimates the child, then if the father was a British citizen or "settled" in the UK when the child was born, the child would become a British citizen and would be regarded as having been one from the date of marriage. This affects only children where the mother is neither a British citizen nor "settled" in the UK.
For children born on or after 1 July 2006, an unmarried father has broadly equivalent rights (compared with a married father) to pass on British citizenship to a child.
Where a child would be a British citizen but for the fact that the parents are not married, the Home Office will usually register the child as a British citizen under section 3(1) of the British Nationality Act provided that the child is still under 18.
If ILR is acquired after the child's birth, the child will not automatically be a British citizen. However the child can be registered as a British citizen under s1(3) of the British Nationality Act 1981 provided application is made before the age of 18. Alternatively, if the child lives in the UK until age 10, it will have a lifetime entitlement to registration as a British citizen under s1(4) of the Act.
Children born in the United Kingdom before 1983 are British citizens regardless of the immigration status of their parents (unless the father was at the time of the child's birth a diplomat accredited to the United Kingdom).
Public funds[edit]
Unlike people with Limited Leave to Remain (LTR) in the UK, ILR holders have access to public funds. "No recourse to public funds" is not written in ILR holders' visas. As a result, they are able to claim job seekers' allowances and other benefits that are usually available only to British, EU, and EEA citizens.
Home student status[edit]
Main article: Home student (United Kingdom)
ILR holders pay home student rates (i.e. the same rate as British, EU, EEA and Swiss citizens) for study at higher education institutions in the UK. That is, they are not charged as international students, unlike LTR visa holders, if they want to study courses in any UK institutions.
Right to stand in elections[edit]
Main article: Elections in the United Kingdom
Commonwealth citizens who have ILR and are resident in the UK have the right to vote and stand as candidates in all elections.[2]
Acquisition of ILR[edit]
ILR can be acquired in a number of ways.
No residence[edit]
A child (including an adopted child) aged under 18 who holds leave to enter or remain with a view to settlement with a parent, parents or a relative who is a settled person and resident in the UK can apply for ILR using Form SET(F).
A parent, grandparent or other dependant relative aged 18 or over of a person who is a settled person and resident in the UK can apply for ILR using Form SET(F).
People satisfying all of the below criteria can apply for ILR using Form SET(DV):
were given permission to come to the UK for up to 27 months or to extend his/her stay for two years as the husband, wife, civil partner, unmarried partner or same-sex partner of a permanent resident (even if that permission is no longer valid)
were still in that relationship at the time they came to the UK or extended their stay as their husband, wife, civil partner, unmarried partner or same-sex partner
can produce evidence that the relationship has broken down permanently since then as a result of domestic violence.
2 years' residence[edit]
A person who has lived in the UK for 2 years with temporary permission to remain in the UK as the husband, wife, civil partner or unmarried/same-sex partner of a British citizen or a settled person and who intends to continue living together (and are still married or in a civil partnership, if applicable) can apply for ILR using Form SET(M), as long as he/she arrived in the UK or applied for permission to stay in the UK on or before 8 July 2012.
Note that a person living in the UK as the husband, wife, civil partner or unmarried/same-sex partner of a British citizen or a settled person who either arrives in the UK or applies for permission to stay in the UK on or after 9 July 2012 must live in the UK for 5 years (and not 2 years) to obtain ILR (see below).
4 years' residence[edit]
A person who has lived in the UK for 4 years with a visa issued before 3 April 2006 under the Highly Skilled Migrant Programme (HSMP) and Employment Not Requiring Work Permit can apply for ILR using Form SET(O).
A commonwealth citizen who has served in the British Armed Forces can apply after serving a minimum of four years, after leaving the Army can apply for ILR using Form SET(AF).[3]
5 years' residence[edit]
A person who has lived in the UK for 5 years with a visa issued in one of the following categories can apply for ILR using Form SET(O):
Tier 1 or Tier 2 of the points-based system (excluding the Post-study work category of Tier 1)
work permit
businessperson
innovator
investor
representative of an overseas newspaper, news agency or broadcasting organisation
private servant in a diplomatic household
domestic worker in a private household
overseas government employee
minister of religion, missionary or member of a religious order
airport-based operational staff of an overseas-owned airline
self-employed lawyer
writer, composer or artist
UK ancestry
highly skilled migrant under the Highly Skilled Migrant Programme (HSMP)
A person who has lived in the UK for 5 years with a visa issued in one of the following categories can apply for ILR using Form SET(BUS):
retired person of independent means
sole representative of an overseas firm.
A person who has been granted humanitarian protection since 30 August 2005 and whose current 5-year permission to stay is due to expire can apply for ILR using Form SET (Protection Route).
A person who has lived in the UK for 5 years under the Gateway Protection Programme can apply for ILR using Form HPDL.
A person who has lived in the UK for 5 years with temporary permission to remain in the UK as the husband, wife, civil partner or unmarried/same-sex partner of a British citizen or a settled person and who intends to continue living together (and are still married or in a civil partnership, if applicable) can apply for ILR, as long as he/she arrived in the UK or applied for permission to stay in the UK on or after 9 July 2012. For those who arrived in the UK or applied for permission to stay in the UK on or before 8 July 2012, a 2-year period of residence (instead of 5 years) applies (see above).
6 years' residence[edit]
A person who has lived in the UK for 6 years with Discretionary Leave can apply for ILR using SET(O). Form HPDL was used as an alternative depending on circumstance but this practice has now ceased.
10 years' residence[edit]
A person who has lived in the UK for 10 years continuously can apply for ILR on the ground of 'long residence' using Form SET(LR) as long as all time spent in the UK during the 10 years has been lawful, and he/she has not left the UK for more than 540 calendar days in total (18 months), or more than 180 calendar days (6 months) at one time.[4][5] In 'compelling or compassionate circumstances', the Home Office can exercise discretion over any excess absences over the threshold.[6] If the person has gaps in lawful residence during the 10-year period, ILR can still be granted as long as each gap did not exceed 28 days and ended before 24 November 2016, or in 'exceptional circumstances' where the gap exceeded 28 days, or where there was a 'good reason beyond the control of the applicant or their representative' if the gap did not exceed 14 days and ended on or after 24 November 2016.[6]
17 years' residence[edit]
A person aged under 18 who has lived in the UK for 7 years continuously (lawfully or unlawfully, but discounting any period of imprisonment) can apply for leave to remain on the grounds of private life using Form FLR(FP) if it would not be reasonable to expect the applicant to leave the UK. During the 7-year period of continuous residence, the person must not have not left the UK for more than 540 calendar days in total (18 months), or more than 180 calendar days (6 months) at one time.[4] After living in the UK for a further 10 years continuously (holding leave to remain on the grounds of private life during this period), he/she can apply for ILR.[7][8]
19–22.5 years' residence[edit]
A person aged between 18 and 25 who has lived in the UK for at least half of his/her life (lawfully or unlawfully, but discounting any period of imprisonment) can apply for leave to remain on the grounds of private life using Form FLR(FP). During the period of continuous residence, the person must not have not left the UK for more than 540 calendar days in total (18 months), or more than 180 calendar days (6 months) at one time.[4] After living in the UK for a further 10 years continuously (holding leave to remain on the grounds of private life during this period), he/she can apply for ILR.[7][8]
30 years' residence[edit]
A person who has lived in the UK for 20 years continuously (lawfully or unlawfully, but discounting any period of imprisonment) can apply for leave to remain on the grounds of private life using Form FLR(FP). During the 20-year period of continuous residence, the person must not have not left the UK for more than 540 calendar days in total (18 months), or more than 180 calendar days (6 months) at one time.[4] After living in the UK for a further 10 years continuously (holding leave to remain on the grounds of private life during this period), he/she can apply for ILR.[7][8]
Alternatively, a person who has lived in the UK for less than 20 years continuously (lawfully or unlawfully, but discounting any period of imprisonment), but faces very significant obstacles to integrating into the country to which he/she would have to go if required to leave the UK, can apply for leave to remain on the grounds of private life using Form FLR(FP). During the period of continuous residence, the person must not have not left the UK for more than 540 calendar days in total (18 months), or more than 180 calendar days (6 months) at one time.[4] After living in the UK for a further 10 years continuously (holding leave to remain on the grounds of private life during this period), he/she can apply for ILR.[7][8]
Outside the Immigration Rules[edit]
UK Visas and Immigration has discretion to grant ILR outside the Immigration Rules either where someone qualifies under one of the immigration policy concessions or for reasons that are particularly compelling in circumstance and it is almost certain that there will be no change in circumstances within five years.[9]
Costs[edit]
Prior to 2003, Indefinite Leave to Remain in the UK was free. However, since 2003, fees have been introduced and have risen each year in April. ILR Fees were introduced at £155[10] in 2003. Following record immigration in 2004–05, mainly from Eastern Europe,[11] for the main applicant the fee was raised in 2005 to £335,[12] in 2007 to £750, and in 2009 to £820.
In 2009 the Government introduced a £70m Migrants Impact Fund. Economic migrants and students coming to the UK from outside the EU are charged a £50.00 levy in addition to their normal visa application fee. The fund is used to support the communities in which they live.[13] A fee was also introduced for dependent applicants, at £50.00 each. In 2009 Premium Applications with an in-person appointment at a regional office were introduced at a cost to the applicant of £1020.[14]
In 2010/11 the application fee was raised to £840 (£1095 premium) including the Migrants Impact Levy.[15] The dependents fee was also increased to £129.00 each.
In August 2010, the new government scrapped the Migrants Impact Fund.[16] However, the levy is still charged; the extra income "will now contribute to the cost of the visa and will mitigate increases that the Government would otherwise have had to make."[17]
On 6 April 2011, the application fee was raised to £972 (£1,350 premium) including the Migrants Impact Levy.[18] The dependents fee was also increased to £486 (£675 premium) each.
From 6 April 2012, the application fee was raised to £991 (£1,377 premium) including the Migrants Impact Levy.[19] The dependents fee was also increased to £496 (£689 premium) each.
From 6 April 2015, the application fee was raised to £1,500 (£1,900 premium).
From 6 April 2016, the application fee was raised to £1,875 (£2,375 premium) per person (dependants also pay the same fees).[20]
From 6 April 2017, the application fee was raised to £2,297 (£2,848 premium) per person (dependants also pay the same fees).[21]
Citizens of EEA member states[edit]
Citizens of countries in the European Economic Area (other than British and Irish citizens) and Swiss citizens obtain permanent residence status automatically after five years' residence in the United Kingdom exercising Treaty rights[22] rather than ILR. The rights of EEA citizens are not governed by UK Immigration Regulations[10] but rather the EEA Regulations.
Under the law as it existed between 2 October 2000 and 29 April 2006, a citizen of an EEA state or Switzerland could be granted permanent residence on application after four years' residence in the United Kingdom exercising Treaty rights (five years from 3 April 2006). Prior to 2 October 2000, citizens of EEA states were deemed to be permanent residents immediately upon taking up residence in the UK to exercise Treaty rights.
The change in the law in 2000 was retroactive. Hence, for example, a French citizen who arrived to work in the UK on 1 July 1986 would have been treated as a permanent resident between that date and 1 October 2000. From 2 October 2000, the status would revert to that of a temporary resident if an application for ILR was not made. On 30 April 2006, with five years' residence exercising Treaty rights accrued, that person regained permanent resident status.
Immigration rule changes[edit]
HC 1016[edit]
With effect from 3 April 2006, the period of time required to obtain Indefinite Leave to Remain increases to five years. These changes were debated in House of Commons Standing Committee on 20 June 2006. All Labour MPs voted for preserving the retroactive aspect of the changes, while all other MPs voted that the Government should bring in transitional arrangements to allow those already in the UK before the rule change to qualify under the previous four-year rule. These changes were protested in demonstrations and rallies in London on 16 June and 23 July 2006.
The changes were retroactive in the sense that people on a four-year visas must apply for a one-year extension before they can apply for ILR, but they did not affect people who had already been granted ILR after four years.
HC 398[edit]
As from 2 April 2007, a new condition has been added that "the applicant has sufficient knowledge of the English language and sufficient knowledge about life in the United Kingdom, unless he is under the age of 18 or aged 65 or over at the time he makes his application."[23]
There are two ways the applicant can meet this condition:[24]
by passing a test called the "Life in the UK Test". The test is taken on a computer at one of the 100 or so Life in the UK Test centres in the UK. It consists of 24 questions based on the information contained in the handbook "Life in the United Kingdom: A Journey to Citizenship" (2nd Edition) and requires a language ability the equivalent of ESOL Entry 3.
by attending an English for Speakers of Other Languages (ESOL) course which includes citizenship materials, and progressing from one ESOL level to the next. It is stated that on average students require between 200 and 450 hours of tuition for each ESOL level.
HC 194[edit]
On 9 July 2012, the 14-year rule (paragraph 276B(i)(b)) (which provided a route to settlement on the grounds of long residence, lawful or unlawful) was withdrawn. Instead, the new Immigration Rules provided that at least 20 years' continuous residence, lawful or unlawful, would, subject to criminality and other criteria, normally be necessary to establish a claim to remain in the UK on the basis of the Article 8 right to respect for private life. (The 10-year rule (paragraph 276B(i)(a)), which provides a route to settlement on the grounds of continuous lawful residence in the UK of at least 10 years, was unaffected and remains in place).[25]
ILR may also be curtailed by the Home Secretary for reasons of national security or if the holder of the ILR commits an offence that could lead to their deportation from the United Kingdom.
A person may also lose ILR by leaving the United Kingdom for more than two years. However, in some circumstances, such a person may reapply for indefinite leave to enter the UK.
British Overseas citizens, British subjects and British protected persons do not lose ILR no matter how long they stay outside the UK.
See also[edit]
British nationality law
Leave to enter
Life in the UK test
Permanent residency
Right of abode
UK Ancestry Entry Clearance
Long-term resident (European Union)
References[edit]
Jump up ^ Art. 13(4)(a), UK Parliament. The Immigration (Leave to Enter and Remain) Order 2000 as made, from legislation.gov.uk.
Jump up ^ Electoral Administration Act 2006, Section 18
Jump up ^ "Apply to settle in the UK - GOV.UK". www.gov.uk.
^ Jump up to: a b c d e "Immigration Rules part 7: other categories - Immigration Rules - Guidance - GOV.UK". www.gov.uk.
Jump up ^ "Apply to settle in the UK: long residence: Eligibility - GOV.UK". www.gov.uk.
^ Jump up to: a b "Home Office: Long residence (Version 15.0)" (PDF).
^ Jump up to: a b c d "Immigration Rules - Guidance - GOV.UK". www.ukba.homeoffice.gov.uk.
^ Jump up to: a b c d "Home Office Immigration Directorate Instruction (Family Migration: Appendix FM Section 1.0b), Section 8 (pp.39-46)" (PDF).
Jump up ^ "Chapter 01: general provisions (immigration directorate instructions) - GOV.UK" (PDF). www.ukba.homeoffice.gov.uk.
^ Jump up to: a b "The Immigration (Leave to Remain) (Fees) Regulations 2003". www.legislation.gov.uk.
Jump up ^ "BBC NEWS - UK - Rate of immigration 'set to rise'". news.bbc.co.uk.
Jump up ^ Westminster, Department of the Official Report (Hansard), House of Commons,. "House of Commons Standing Committee". www.publications.parliament.uk.
Jump up ^ Foundation, Internet Memory. "[ARCHIVED CONTENT] UK Government Web Archive – The National Archives". webarchive.nationalarchives.gov.uk. Archived from the original on 8 April 2010.
Jump up ^ "Archived copy". Archived from the original on 4 January 2008. Retrieved 2007-12-18.
Jump up ^ http://www.ukba.homeoffice.gov.uk/sitecontent/documents/britishcitizenship/feesfrom060410.pdf[permanent dead link]
Jump up ^ Wintour, Patrick (6 August 2010). "Fund to ease impact of immigration scrapped by stealth" – via The Guardian.
Jump up ^ Westminster, Department of the Official Report (Hansard), House of Lords,. "Lords Hansard text for 17 Nov 201017 Nov 2010 (pt 0001)". www.publications.parliament.uk.
Jump up ^ "Visa fees - GOV.UK" (PDF). www.ukba.homeoffice.gov.uk.
Jump up ^ http://www.ukba.homeoffice.gov.uk/sitecontent/documents/aboutus/fees-table-spring-2012.pdf[permanent dead link]
Jump up ^ "Apply to settle in the UK - GOV.UK". www.gov.uk.
Jump up ^ https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/607212/Fees_table_April_2017.pdf
Jump up ^ "European nationals and schemes (entry clearance guidance) - GOV.UK". www.ukba.homeoffice.gov.uk.
Jump up ^ "Immigration Rules - Guidance - GOV.UK". www.ind.homeoffice.gov.uk.
Jump up ^ "Archived copy". Archived from the original on 16 June 2007. Retrieved 2007-05-20.
Jump up ^ "Statement of changes to the Immigration Rules: HC194, June 2012 - GOV.UK" (PDF). www.ukba.homeoffice.gov.uk.
External links[edit]
UK Border Agency - Applying for settlement in the United Kingdom
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Borders of the oceans
From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
The limits of the Earth's oceanic waters
Maps exhibiting the world's oceanic waters. A continuous body of water encircling the Earth, the world (global) ocean is divided into a number of principal areas. Five oceanic divisions are usually recognized: Pacific, Atlantic, Indian, Arctic, and Southern; the last two listed are sometimes consolidated into the first three.
The borders of the oceans are the limits of the Earth's oceanic waters. The definition and number of oceans can vary depending on the adopted criteria.
Contents
1 Overview
2 Arctic Ocean
2.1 Notes
3 Atlantic Ocean
3.1 North Atlantic
3.2 South Atlantic
3.3 Notes
4 Indian Ocean
4.1 Notes
5 Pacific Ocean
5.1 North Pacific
5.2 South Pacific
5.3 Notes
6 Southern or Antarctic Ocean
7 See also
8 References
Overview[edit]
Though generally described as several separate oceans, the world's oceanic waters constitute one global, interconnected body of salt water sometimes referred to as the World Ocean or global ocean.[1][2] This concept of a continuous body of water with relatively free interchange among its parts is of fundamental importance to oceanography.[3]
The major oceanic divisions are defined in part by the continents, various archipelagos, and other criteria. The principal divisions (in descending order of area) are the: Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern (Antarctic) Ocean, and Arctic Ocean. Smaller regions of the oceans are called seas, gulfs, bays, straits, and other names.
Geologically, an ocean is an area of oceanic crust covered by water. Oceanic crust is the thin layer of solidified volcanic basalt that covers the Earth's mantle. Continental crust is thicker but less dense. From this perspective, the Earth has three oceans: the World Ocean, the Caspian Sea,[citation needed] and the Black Sea. The latter two were formed by the collision of Cimmeria with Laurasia. The Mediterranean Sea is at times a discrete ocean, because tectonic plate movement has repeatedly broken its connection to the World Ocean through the Strait of Gibraltar. The Black Sea is connected to the Mediterranean through the Bosporus, but the Bosporus is a natural canal cut through continental rock some 7,000 years ago, rather than a piece of oceanic sea floor like the Strait of Gibraltar.
Despite their names, some smaller landlocked "seas" are not connected with the World Ocean, such as the Caspian Sea (which is nevertheless, geologically, itself a full-fledged ocean—see above) and numerous salt lakes such as the Aral Sea.
A complete hierarchy showing which seas belong to which oceans, according to the International Hydrographic Organization (IHO) and for the whole planet, is available at the European Marine Gazetteer website.[4] See also the list of seas article for the seas included in each ocean area. Also note there are many varying definitions of the world's seas and no single authority.
The borders of the Arctic Ocean, according to the CIA The World Factbook[5] (blue area), and as defined by the IHO (black outline - excluding marginal waterbodies).
Arctic Ocean[edit]
The Arctic Ocean covers much of the Arctic and washes upon northern North America and Eurasia and is sometimes considered a sea or estuary of the Atlantic.[6][7]
The International Hydrographic Organization (IHO) defines the limits of the Arctic Ocean (excluding the seas it contains) as follows:[8]
Between Greenland and West Spitzbergen [sic] — The Northern limit of Greenland Sea.[Ar 1]
Between West Spitzbergen and North East Land — the parallel of lat. 80°N.
From Cape Leigh Smith to Cape Kohlsaat — the Northern limit of Barentsz Sea [sic].[Ar 2]
From Cape Kohlsaat to Cape Molotov — the Northern limit of Kara Sea.[Ar 3]
From Cape Molotov to the Northern extremity of Kotelni Island — the Northern limit of Laptev Sea.[Ar 4]
From the Northern extremity of Kotelni Island to the Northern point of Wrangel Island — the Northern limit of East Siberian Sea.[Ar 5]
From the Northern point of Wrangel Island to Point Barrow — the Northern limit of Chuckchi Sea [sic].[Ar 6]
From Point Barrow to Cape Land's End on Prince Patrick Island — the Northern limit of Beaufort Sea,[Ar 7] through the Northwest coast of Prince Patrick Island to Cape Leopold M'Clintock, thence to Cape Murray (Brook Island) and along the Northwest coast to the extreme Northerly point; to Cape Mackay (Borden Island); through the Northwesterly coast of Borden Island to Cape Malloch, to Cape Isachsen (Ellef Ringnes Island); to the Northwest point of Meighen Island to Cape Stallworthy (Axel Heiberg Island) to Cape Colgate the extreme West point of Ellesmere Island; through the North shore of Ellesmere Island to Cape Columbia thence a line to Cape Morris Jesup (Greenland).
Note that these definitions exclude any marginal waterbodies that are separately defined by the IHO (such as the Kara Sea and East Siberian Sea), though these are usually considered to be part of the Arctic Ocean.
The CIA defines the limits of the Arctic Ocean differently, as depicted in the map comparing its definition to the IHO's definition.
Notes[edit]
Jump up ^ Defined by IHO as "A line joining the Northernmost point of Spitzbergen [sic] [Svalbard] to the Northernmost point of Greenland".
Jump up ^ Defined by IHO as "Cape Leigh Smith across the Islands Bolshoy Ostrov (Great Island) [Storøya], Gilles [Kvitøya] and Victoria; Cape Mary Harmsworth (Southwestern extremity of Alexandra Land) along the northern coasts of Franz-Josef Land as far as Cape Kohlsaat (81°14′N 65°10′E / 81.233°N 65.167°E / 81.233; 65.167)".
Jump up ^ Defined by IHO as "Cape Kohlsaat to Cape Molotov (81°16′N 93°43′E / 81.267°N 93.717°E / 81.267; 93.717) (Northern extremity of Severnaya Zemlya on Komsomolets Island)".
Jump up ^ Defined by IHO as "A line joining Cape Molotov to the Northern extremity of Kotelni Island (76°10′N 138°50′E / 76.167°N 138.833°E / 76.167; 138.833)".
Jump up ^ Defined by IHO as "A line from the Northernmost point of Wrangel Island (179°30'W) to the Northern sides of the De Long Islands (including Henrietta and Jeannette Islands) and Bennett Island, thence to the Northern extremity of Kotelni Island".
Jump up ^ Defined by IHO as "A line from Point Barrow, Alaska (71°20′N 156°20′W / 71.333°N 156.333°W / 71.333; -156.333) to the Northernmost point of Wrangel Island (179°30'W)".
Jump up ^ Defined by IHO as "A line from Point Barrow, Alaska, to Lands End, Prince Patrick Island (76°16′N 124°08′W / 76.267°N 124.133°W / 76.267; -124.133)".
Atlantic Ocean[edit]
The Atlantic Ocean, according to the CIA The World Factbook[9] (blue area), and as defined by the IHO (black outline - excluding marginal waterbodies).
The Atlantic Ocean separates the Americas from Europe and Africa. It may be further subdivided by the equator into northern and southern portions.
North Atlantic[edit]
The 3rd edition, currently in force, of the International Hydrographic Organization's (IHO) Limits of Oceans and Seas defines the limits of the North Atlantic Ocean (excluding the seas it contains) as follows:[8]
On the West. The Eastern limits of the Caribbean Sea,[At 1] the Southeastern limits of the Gulf of Mexico[At 2] from the North coast of Cuba to Key West, the Southwestern limit of the Bay of Fundy[At 3] and the Southeastern and Northeastern limits of the Gulf of St. Lawrence.[At 4]
On the North. The Southern limit of Davis Strait[At 5] from the coast of Labrador to Greenland and the Southwestern limit of the Greenland Sea[At 6] and Norwegian Sea[At 7] from Greenland to the Shetland Islands.
On the East. The Northwestern limit of the North Sea,[At 8] the Northern and Western limits of the Scottish Seas,[At 9] the Southern limit of the Irish Sea,[At 10] the Western limits of the Bristol[At 11] and English Channels,[At 12] of the Bay of Biscay[At 13] and of the Mediterranean Sea.[At 14]
On the South. The equator, from the coast of Brazil to the Southwestern limit of the Gulf of Guinea.[At 15]
South Atlantic[edit]
The 3rd edition (currently in force) of the International Hydrographic Organization's (IHO) Limits of Oceans and Seas defines the limits of the South Atlantic Ocean (excluding the seas it contains) as follows:[8]
On the Southwest. The meridian of Cape Horn, Chile (67°16'W) from Tierra del Fuego to the Antarctic Continent; a line from Cape Virgins (52°21′S 68°21′W / 52.350°S 68.350°W / -52.350; -68.350) to Cape Espiritu Santo, Tierra del Fuego, the Eastern entrance to Magellan Strait, Chile
On the West. The limit of the Rio de La Plata.[At 16]
On the North. The Southern limit of the North Atlantic Ocean.
On the Northeast. The limit of the Gulf of Guinea.[At 15]
On the Southeast. From Cape Agulhas along the meridian of 20° East to the Antarctic continent.
On the South. The Antarctic Continent.
Note that these definitions exclude any marginal waterbodies that are separately defined by the IHO (such as the Bay of Biscay and Gulf of Guinea), though these are usually considered to be part of the Atlantic Ocean.
In its 2002 draft, the IHO redefined the Atlantic Ocean, moving its southern limit to 60°S, with the waters south of that line identified as the Southern Ocean. This new definition has not yet been ratified (and, in addition, a reservation was lodged in 2003 by Australia.)[10] While the name "Southern Ocean" is frequently used, some geographic authorities such as the 10th edition of the World Atlas from the U.S. National Geographic Society generally show the Atlantic, Indian, and Pacific Oceans continuing to Antarctica. If and when adopted, the 2002 definition would be published in the 4th edition of Limits of Oceans and Seas, re-instituting the 2nd edition's "Southern Ocean", omitted from the 3rd edition.
Notes[edit]
Jump up ^ Defined by IHO as "From Point San Diego (Puerto Rico) Northward along the meridian thereof (65°39'W) to the 100 fathom line, thence Eastward and Southward, in such a manner that all islands, shoals and narrow waters of the Lesser Antilles are included in the Caribbean Sea as far as Galera Point (Northeast extremity of the island of Trinidad). From Galera Point through Trinidad to Galeota Point (Southeast extreme) and thence to Baja Point (9°32′N 61°0′W / 9.533°N 61.000°W / 9.533; -61.000) in Venezuela".
Jump up ^ Defined by IHO as "A line joining Cape Catoche Light (21°37′N 87°04′W / 21.617°N 87.067°W / 21.617; -87.067) with the Light on Cape San Antonio in Cuba, through this island to the meridian of 83°W and to the Northward along this meridian to the latitude of the South point of the Dry Tortugas (24°35'N), along this parallel Eastward to Rebecca Shoal (82°35'W) thence through the shoals and Florida Keys to the mainland at eastern end of Florida Bay, all the narrow waters between the Dry Tortugas and the mainland being considered to be within the Gulf".
Jump up ^ Defined by IHO as "A line running northwesterly from Cape St. Mary (44°05'N) Nova Scotia, through Machias Seal Island (67°06'W) and on to Little River Head (44°39'N) in the State of Maine".
Jump up ^ Defined by IHO as "A line from Cape Canso (45°20′N 61°0′W / 45.333°N 61.000°W / 45.333; -61.000) to Red Point (45°35′N 60°45′W / 45.583°N 60.750°W / 45.583; -60.750) in Cape Breton Island, through this Island to Cape Breton and on to Pointe Blanche (46°45′N 56°11′W / 46.750°N 56.183°W / 46.750; -56.183) in the Island of St. Pierre, and thence to the Southwest point of Morgan Island (46°51′N 55°49′W / 46.850°N 55.817°W / 46.850; -55.817)" and "A line running from Cape Bauld (North point of Kirpon Island, 51°40′N 55°25′W / 51.667°N 55.417°W / 51.667; -55.417) to the East extreme of Belle Isle and on to the Northeast Ledge (52°02′N 55°15′W / 52.033°N 55.250°W / 52.033; -55.250). Thence a line joining this ledge with the East extreme of Cape St. Charles (52°13'N) in Labrador".
Jump up ^ Defined by IHO as "The parallel of 60° North between Greenland and Labrador".
Jump up ^ Defined by IHO as "A line joining Straumness (NW extreme of Iceland) to Cape Nansen (68°15′N 29°30′W / 68.250°N 29.500°W / 68.250; -29.500) in Greenland".
Jump up ^ Defined by IHO as "From a point on the West coast of Norway in Latitude 61°00' North along this parallel to Longitude 0°53' West thence a line to the NE extreme of Fuglö (62°21′N 6°15′W / 62.350°N 6.250°W / 62.350; -6.250 (Fuglö)) and on to the East extreme of Gerpir (65°05′N 13°30′W / 65.083°N 13.500°W / 65.083; -13.500 (Gerpir)) in Iceland".
Jump up ^ Defined by IHO as "From Dunnet Head (3°22'W) in Scotland to Tor Ness (58°47'N) in the Island of Hoy, thence through this island to the Kame of Hoy (58°55'N) on to Breck Ness on Mainland (58°58'N) through this island to Costa Head (3°14'W) and to Inga Ness (59'17'N) in Westray through Westray, to Bow Head, across to Mull Head (North point of Papa Westray) and on to Seal Skerry (North point of North Ronaldsay) and thence to Horse Island (South point of the Shetland Islands)".
Jump up ^ Defined by IHO as "A line running from Bloody Foreland (55°10′N 8°17′W / 55.167°N 8.283°W / 55.167; -8.283) in Ireland to the West point of Tory Island, on to Barra Head, the Southwest point of the Hebrides, thence through these islands, in such a manner that the West coasts of the main islands appertain to the Atlantic Ocean and all the narrow waters appertain to the Inner Seas, as far as the Butt of Lewis (North Point), and thence to Cape Wrath (58°37'N) in Scotland".
Jump up ^ Defined by IHO as "A line joining St. David's Head (51°54′N 5°19′W / 51.900°N 5.317°W / 51.900; -5.317) to Carnsore Point (52°10′N 6°22′W / 52.167°N 6.367°W / 52.167; -6.367)".
Jump up ^ Defined by IHO as "a line joining Hartland Point [in Devon] (51°01′N 4°32′W / 51.017°N 4.533°W / 51.017; -4.533) to St. Govan's Head [in Pembrokeshire] (51°36′N 4°55′W / 51.600°N 4.917°W / 51.600; -4.917)".
Jump up ^ Defined by IHO as "A line joining Isle Vierge (48°38′23″N 4°34′13″W / 48.63972°N 4.57028°W / 48.63972; -4.57028) to Lands End (50°04′N 5°43′W / 50.067°N 5.717°W / 50.067; -5.717)".
Jump up ^ Defined by IHO as "A line joining Cap Ortegal (43°46′N 7°52′W / 43.767°N 7.867°W / 43.767; -7.867) to Penmarch Point (47°48′N 4°22′W / 47.800°N 4.367°W / 47.800; -4.367)".
Jump up ^ Defined by IHO as "A line joining the extremities of Cape Trafalgar (Spain) and Cape Spartel (Africa)".
^ Jump up to: a b Defined by IHO as "A line running Southeastward from Cape Palmas in Liberia to Cape Lopez (0°38′S 8°42′E / 0.633°S 8.700°E / -0.633; 8.700)".
Jump up ^ Defined by IHO as "A line joining Punta del Este, Uruguay (34°58.5′S 54°57.5′W / 34.9750°S 54.9583°W / -34.9750; -54.9583) and Cabo San Antonio, Argentina (36°18′S 56°46′W / 36.300°S 56.767°W / -36.300; -56.767)".
Indian Ocean[edit]
The Indian Ocean, according to the CIA The World Factbook[11] (blue area), and as defined by the IHO (black outline - excluding marginal waterbodies).
The Indian Ocean washes upon southern Asia and separates Africa and Australia.
The 3rd edition, currently in force, of the International Hydrographic Organization's (IHO) Limits of Oceans and Seas defines the limits of the Indian Ocean (excluding the seas it contains) as follows:[8]
On the North. The Southern limits of the Arabian Sea[I 1] and the Lakshadweep Sea,[I 2] the Southern limit of the Bay of Bengal,[I 3] the Southern limits of the East Indian Archipelago,[I 4] and the Southern limit of the Great Australian Bight.[I 5]
On the West. From Cape Agulhas in 20° long. East, Southward along this meridian to the Antarctic Continent.
On the East. From South East Cape, the Southern point of Tasmania down the meridian 146°55'E to the Antarctic Continent.
On the South. The Antarctic Continent.
Note that this definition excludes any marginal waterbodies that are separately defined by the IHO (such as the Bay of Bengal and Arabian Sea), though these are usually considered to be part of the Indian Ocean.
In its 2002 draft, the IHO redefined the Indian Ocean, moving its southern limit to 60°S, with the waters south of that line identified as the Southern Ocean. This new definition has not yet been ratified (and, in addition, a reservation was lodged in 2003 by Australia.)[10] While the name "Southern Ocean" is frequently used, some geographic authorities such as the 10th edition of the World Atlas from the U.S. National Geographic Society generally show the Atlantic, Indian, and Pacific Oceans continuing to Antarctica. If and when adopted, the 2002 definition would be published in the 4th edition of Limits of Oceans and Seas, re-instituting the 2nd edition's "Southern Ocean", omitted from the 3rd edition.
The boundary of the Indian Ocean is a constitutional issue for Australia. The Imperial South Australia Colonisation Act, 1834, which established and defined the Colony of South Australia defined South Australia’s southern limit as being the “Southern Ocean.” This definition was carried through to Australian constitutional law upon the Federation of Australia in 1901.
Notes[edit]
Jump up ^ Defined by IHO as "A line running from the South extremity of Addu Atoll (Maldives), to the Eastern extreme of Ràs Hafun (Africa, 10°26'N)".
Jump up ^ Defined by IHO as "A line running from Dondra Head in Ceylon [Sri Lanka] to the most Southerly point of Addu Atoll".
Jump up ^ Defined by IHO as "Adam's Bridge (between India and Ceylon and from the Southern extreme of Dondra Head (South point of Ceylon) to the North point of Poeloe Bras (5°44′N 95°04′E / 5.733°N 95.067°E / 5.733; 95.067)".
Jump up ^ Defined by IHO as the southern limits of the Java Sea ("the North and West coasts of Java to Java Hoofd (6°46′S 105°12′E / 6.767°S 105.200°E / -6.767; 105.200) its Western point, and thence a line to Vlakke Hoek (5°55′S 104°35′E / 5.917°S 104.583°E / -5.917; 104.583) the Southern extreme of Sumatra"), the Bali Sea ("A line from Tanjong Banenan through the Southern points of Balt [sic] and Noesa Islands to Tanjong Bt Gendang, the Southwest extreme of Lombok, and its South coast to Tanjong Ringgit the Southeast extreme, thence a line to Tanjong Mangkoen (9°01′S 116°43′E / 9.017°S 116.717°E / -9.017; 116.717) the Southwest extreme of Soembawa"), the Savu Sea ("By a line from the Southwest point of Timor to the Northeast point of Roti, through this island to its Southwest point, thence a line to Poeloe Dana (10°49′S 121°17′E / 10.817°S 121.283°E / -10.817; 121.283) and to Tanjong Ngoendjoe, the Southern extreme of Soemba and through this island to Tanjong Karosso, its Western point"), and the western limit of the Timor Sea ("A line from Cape Londonderry to the Southwest point of Roti Island (10°56′S 122°48′E / 10.933°S 122.800°E / -10.933; 122.800)".
Jump up ^ Defined by IHO as "A line joining West Cape Howe (35°08′S 117°37′E / 35.133°S 117.617°E / -35.133; 117.617) Australia to South West Cape, Tasmania".
Pacific Ocean[edit]
The Pacific Ocean according to the CIA The World Factbook[12] (blue area), and as defined by the IHO (black outline — excluding marginal waterbodies)
The Pacific is the ocean that separates Asia and Australia from the Americas. It may be further subdivided by the equator into northern and southern portions.
North Pacific[edit]
The 3rd edition, currently in force, of the International Hydrographic Organization's (IHO) Limits of Oceans and Seas defines the limits of the North Pacific Ocean (excluding the seas it contains) as follows:[8]
On the Southwest. The Northeastern limit of the East Indian Archipelago from the Equator to Luzon Island.
On the West and Northwest. The Eastern limits of the Philippine Sea[P 1] and Japan Sea[P 2] and the Southeastern limit of the Sea of Okhotsk.[P 3]
On the North. The Southern limits of the Bering Sea[P 4] and the Gulf of Alaska.[P 5]
On the East. The Western limit of Coastal waters of Southeast Alaska and Br. Columbia,[P 6] and the Southern limit of the Gulf of California.[P 7]
On the South. The Equator, but excluding those islands of the Gilbert and Galàpagos Groups which lie to the Northward thereof.
South Pacific[edit]
The 3rd edition, currently in force, of the International Hydrographic Organization's (IHO) Limits of Oceans and Seas defines the limits of the South Pacific Ocean (excluding the seas it contains) as follows:[8]
On the West. From Southeast Cape, the Southern point of Tasmania, down the meridian of 146°55'E to the Antarctic continent.
On the Southwest and Northwest. The Southern, Eastern and Northeastern limits of the Tasman Sea,[P 8][P 9][P 10] the Southeastern and Northeastern limits of the Coral Sea,[P 11][P 12] the Southern, Eastern and Northern limits of the Solomon[P 13][P 14] and Bismark [sic][P 15] seas, and the Northeastern limit of the East Indian Archipelago from New Guinea to the Equator.
On the North. The Equator, but including those islands of the Gilbert and Galàpagos Groups which lie to the Northward thereof.
On the East. The meridian of Cape Horn (67°16'W) from Tierra del Fuego to the Antarctic continent; a line from Cape Virgins (52°21′S 68°21′W / 52.350°S 68.350°W / -52.350; -68.350) to Cape Espititu Santo, Tierra del Fuego, the Eastern entrance to Magellan Strait. (These limits have not yet been officially accepted by Argentina and Chile.)
On the South. The Antarctic continent.
Note that these definitions exclude any marginal waterbodies that are separately defined by the IHO (such as the Gulf of Alaska and Coral Sea), though these are usually considered to be part of the Pacific Ocean.
In its 2002 draft, the IHO redefined the Pacific Ocean, moving its southern limit to 60°S, with the waters south of that line identified as the Southern Ocean. This new definition has not yet been ratified (and, in addition, a reservation was lodged in 2003 by Australia.)[10] While the name "Southern Ocean" is frequently used, some geographic authorities such as the 10th edition of the World Atlas from the U.S. National Geographic Society generally show the Atlantic, Indian, and Pacific Oceans continuing to Antarctica. If and when adopted, the 2002 definition would be published in the 4th edition of Limits of Oceans and Seas, re-instituting the 2nd edition's "Southern Ocean", omitted from the 3rd edition.
Notes[edit]
Jump up ^ Defined by IHO as "By the ridge joining Japan to the Bonin, Volcano and Ladrone (Mariana) Islands, all these being included in the Philippine Sea".
Jump up ^ Defined by IHO as "In the Tsugaru Kaikô. From the extremity of Siriya Saki (141°28'E) to the extremity of Esan Saki (41°48'N)".
Jump up ^ Defined by IHO as "A line running from Nosyappu Saki (Cape Noshap, 43°23'N) in the Island of Hokusyû (Yezo) through the Kuril or Tisima Islands to Cape Lopatka (South point of Kamchatka) in such a way that all the narrow waters between Hokusyû and Kamchatka are included in the Sea of Okhotsk".
Jump up ^ Defined by IHO as "A line running from Kabuch Point (54°48′N 163°21′W / 54.800°N 163.350°W / 54.800; -163.350) in the Alaskan Peninsula, through the Aleutian Islands to the South extremes of the Komandorski Islands and on to Cape Kamchatka in such a way that all the narrow waters between Alaska and Kamchatka are included in the Bering Sea".
Jump up ^ Defined by IHO as "A line drawn from Cape Spencer, the Northern limit of [the Coastal Waters of Southeast Alaska and British Columbia] to Kabuch Point, the Southeast limit of [the Bering Sea], in such a way that all the adjacent islands are included in the Gulf of Alaska".
Jump up ^ Defined by IHO as "A line running westerly from Black Rock Point (50°44',5N) in Vancouver Island through the Scott Islands in such a way that all the narrow waters between these islands are included in the Coastal Waters, thence to Cape St. James (Southern extremity of Queen Charlotte Islands), through this group in the same way, then from Cape Knox (54°10′N 133°06′W / 54.167°N 133.100°W / 54.167; -133.100) Northward to the Western extreme of Langara Island and on to Point Cornwallis (132°52'W) in the Prince of Wales group, thence along the Western shores of this group, of Baranof, Kruzof, Chicagof, and Yakobi Islands, so that all the narrow waters between them are included in the coastal waters, and, finally, from Cape Bingham (58°04'N) in Yakobi Island to Cape Spencer (58°12′N 136°39′W / 58.200°N 136.650°W / 58.200; -136.650)".
Jump up ^ Defined by IHO as "A line joining Piastla Point (23°38'N) in Mexico, and the Southern extreme of Lower California".
Jump up ^ Southern limit defined by IHO as "A line joining the Southern point of Auckland Island (50°55′S 166°0′E / 50.917°S 166.000°E / -50.917; 166.000) to South East Cape, the Southern point of Tasmania"
Jump up ^ Eastern limit defined by IHO as "In Cook Strait. A line joining the South extreme of the foul ground off Cape Palliser (Ngawi) and the Lighthouse on Cape Campbell (Te Karaka)" and "In Foveaux Strait (46°45'S). A line joining the Light on Waipapapa Point [sic] (168°33'E) with East Head (47'02'S) of Stewart Island (Rakiura)."
Jump up ^ Northeastern limit defined by IHO as "From the South East Rock to the North point of Three Kings Islands (34°10′S 172°10′E / 34.167°S 172.167°E / -34.167; 172.167) thence to North Cape in New Zealand".
Jump up ^ Southeastern limit defined by IHO as "A line from the Southeastern extreme of Aneityum Island to Southeast (Nokanhui) Islets (22°46′S 167°34′E / 22.767°S 167.567°E / -22.767; 167.567) off the Southeast extreme of New Caledonia, thence through the East point of Middleton Reef to the Eastern extreme of Elizabeth Reef (29°55′S 159°02′E / 29.917°S 159.033°E / -29.917; 159.033) and down this meridian to Latitude 30° South".
Jump up ^ Northeastern limit defined by IHO as "From the Northernmost island of the Duff or Wilson Group through these islands to their Southeastern extreme, thence a line to Mera Lava, New Hebrides Islands [Vanuatu] (14°25′S 163°03′E / 14.417°S 163.050°E / -14.417; 163.050) and down the Eastern coasts of the islands of this Group to Aneityum Island (20°11′S 169°51′E / 20.183°S 169.850°E / -20.183; 169.850) in such a way that all the islands of these Groups, and the straits separating them, are included in the Coral Sea".
Jump up ^ Southern limit defined by IHO as "The Northern limit of the Coral Sea between San Cristobal Island [Makira], Solomons, and Gado-Gadoa Island, off the Southeast extreme of New Guinea, thence a line to the Southern extreme of Rennell Island and from its Eastern point to Cape Surville, the Eastern extreme of San Cristobal Island".
Jump up ^ Eastern limit definied by IHO as "By a line from the Southern point of New Ireland to the North point of Buka Island, through this island to the Northwest point of Bougainville Island, along the Southern coasts of Bougainville, Choisel [Choiseul], Ysabel [Santa Isabel], Malaita and San Cristobal Islands".
Jump up ^ North and Eastern limit defined by IHO as "By the Northern and Northeastern coasts of the islands of New Ireland, New Hanover, the Admiralty Islands, Hermit Island, and the Ninigo Group, through Manu and Aua Islands to Wuvulu Island and thence a line to Baudissin Point in New Guinea (142°02'E)".
Southern or Antarctic Ocean[edit]
The Southern Ocean according to the CIA The World Factbook[13]
The Southern Ocean contains the waters that surround Antarctica and sometimes is considered an extension of Pacific, Atlantic and Indian Oceans.[8]
In 1928, the first edition of the International Hydrographic Organization's (IHO) Limits of Oceans and Seas publication included the Southern Ocean around Antarctica. The Southern Ocean was delineated by land-based limits - the continent of Antarctica to the south, and the continents of South America, Africa, and Australia plus Broughton Island, New Zealand in the north. The detailed land-limits used were Cape Horn in South America, Cape Agulhas in Africa, the southern coast of Australia from Cape Leeuwin, Western Australia, to South East Cape, Tasmania, via the western edge of the water body of Bass Strait, and then Broughton Island before returning to Cape Horn.[14]
The northern limits of the Southern Ocean were moved southwards in the IHO's 1937 second edition of the Limits of Oceans and Seas. The Southern Ocean then extended from Antarctica northwards to latitude 40° south between Cape Agulhas in Africa (long. 20° east) and Cape Leeuwin in Western Australia (long. 115° east), and extended to latitude 55° south between Auckland Island of New Zealand (long. 165° or 166° east) and Cape Horn in South America (long. 67° west).[15]
The Southern Ocean did not appear in the 1953 third edition because "...the northern limits ... are difficult to lay down owing to their seasonal change ... Hydrographic Offices who issue separate publications dealing with this area are therefore left to decide their own northern limits. (Great Britain uses the Latitude of 55° South)". Instead, in the IHO 1953 publication, the Atlantic, Indian and Pacific Oceans were extended southward, the Indian and Pacific Oceans (which had not previously touched pre 1953, as per the first and second editions) now abutted at the meridian of South East Cape, and the southern limits of the Great Australian Bight and the Tasman Sea were moved northwards.[16]
The IHO readdressed the question of the Southern Ocean in a survey in 2000. Of its 68 member nations, 28 responded, and all responding members except Argentina agreed to redefine the ocean, reflecting the importance placed by oceanographers on ocean currents. The proposal for the name Southern Ocean won 18 votes, beating the alternative Antarctic Ocean. Half of the votes supported a definition of the ocean's northern limit at 60°S (with no land interruptions at this latitude), with the other 14 votes cast for other definitions, mostly 50°S, but a few for as far north as 35°S.
The 4th edition of Limits of Oceans and Seas has yet to be published due to 'areas of concern' by several countries relating to various naming issues around the world. The IHB circulated a new draft of the 4th edition of the publication in August 2002, however there were still various changes, 60 seas were added or renamed from the 3rd edition, and even the name of the publication was changed.[17] A reservation had also been lodged by Australia regarding the Southern Ocean limits.[10] Effectively, the 3rd edition (which did not delineate the Southern Ocean leaving delineation to local hydrographic offices) has yet to be superseded and IHO documents declare that it remains "currently in force."
Despite this, the 4th edition definition has de facto usage by many organisations, scientists and nations - even at times by IHO committees.[18] Some nations' hydrographic offices have defined their own boundaries; the United Kingdom used the 55°S parallel for example.[16]
Other sources, such as the National Geographic Society, show the Atlantic, Pacific and Indian Oceans as extending to Antarctica, although articles on the National Geographic web site have begun to reference the Southern Ocean.[19]
In Australia, cartographic authorities defined the Southern Ocean as including the entire body of water between Antarctica and the south coasts of Australia and New Zealand. This delineation is basically the same as the original (first) edition of the IHO publication and effectively the same as the second edition. In the second edition, the Great Australian Bight was defined as the only geographical entity between the Australian coast and the Southern Ocean. Coastal maps of Tasmania and South Australia label the sea areas as Southern Ocean,[20] while Cape Leeuwin in Western Australia is described as the point where the Indian and Southern Oceans meet.[21]
See also[edit]
Environment portal
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List of seas
International Maritime Organization
Marginal sea
Oceanography
Polar seas
Sea
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World Ocean Atlas
References[edit]
Jump up ^ " "Ocean", The Columbia Encyclopedia, New York: Columbia University Press, 2002, archived from the original on 26 January 2011
Jump up ^ "Distribution of land and water on the planet", UN Atlas of the Oceans, archived from the original on 31 May 2008
Jump up ^ Spilhaus, Athelstan F. (July 1942). "Maps of the whole world ocean". 32 (3). American Geographical Society).: 431–5.
Jump up ^ European Marine Gazetteer browser, MarBEF Data System - European Marine Gazetteer
Jump up ^ "Arctic Ocean". The World Factbook. Central Intelligence Agency. Retrieved 27 November 2010.
Jump up ^ The Ocean, The MarineBio Conservation Society
Jump up ^ Arctic Ocean, Encyclopædia Britannica
^ Jump up to: a b c d e f g "Limits of Oceans and Seas, 3rd edition" (PDF). International Hydrographic Organization. 1953. Retrieved 25 August 2015.
Jump up ^ "Atlantic Ocean". The World Factbook. Central Intelligence Agency. Retrieved 27 November 2010.
^ Jump up to: a b c d Darby, Andrew (22 December 2003). "Canberra all at sea over position of Southern Ocean". The Age. Retrieved 21 December 2009.
Jump up ^ "Indian Ocean". The World Factbook. Central Intelligence Agency. Retrieved 27 November 2010.
Jump up ^ "Pacific Ocean". The World Factbook. Central Intelligence Agency. Retrieved 27 November 2010.
Jump up ^ "Southern Ocean". The World Factbook. Central Intelligence Agency. Retrieved 27 November 2010.
Jump up ^ "Map accompanying first edition of IHO Publication Limits of Oceans and Seas, Special Publication 23". NOAA Photo Library. National Oceanic and Atmospheric Administration (NOAA). Retrieved 19 January 2014.
Jump up ^ "Map accompanying second edition of IHO Publication Limits of Oceans and Seas, Special Publication 23". NOAA Photo Library. National Oceanic and Atmospheric Administration (NOAA). Retrieved 18 January 2014.
^ Jump up to: a b "Limits of Oceans and Seas, 3rd edition" (PDF). International Hydrographic Organization. 1953. Retrieved 7 February 2010.
Jump up ^ "IHO Special Publication 23". Korean Hydrographic and Oceanographic Administration. Retrieved 2017-05-24.
Jump up ^ Schenke, Hans Werner (September 2003). "Proposal for the preparation of a new International Bathymetric Chart of the Southern Ocean" (PDF). IHO International Hydrographic Committee on Antarctica (HCA). Third HCA Meeting, 8–10 September 2003. Monaco: International Hydrographic Organization (IHO). Retrieved 17 January 2014.
Jump up ^ "Southern Ocean - News Watch". National Geographic. Retrieved 26 April 2013.
Jump up ^ For example: Chart Aus343: Australia South Coast - South Australia - Whidbey Isles to Cape Du Couedic, Australian Hydrographic Service, 10 April 2015, retrieved 2017-05-24 , Chart Aus792: Australia - Tasmania - Trial Harbour to Low Rocky Point, Australian Hydrographic Service, 18 July 2008, retrieved 11 October 2010
Jump up ^ "- Assessment Documentation for Cape Leeuwin Lighthouse" (PDF). Register of Heritage Places. 13 May 2005. p. 11. Retrieved 13 October 2010.
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/wiki/Cimmerian_plate
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Cimmerian plate

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/wiki/Kotelny/Faddeyevsky_Island
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Kotelny/Faddeyevsky Island

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/wiki/Victoria_Island_(Russian_Arctic)
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Victoria Island (Russian Arctic)

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values: Inner Seas off the West Coast of Scotland

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/wiki/Magellan_Strait
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Magellan Strait

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/wiki/Cape_Catoche
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Cape Catoche

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/wiki/Isle_Vierge
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Isle Vierge

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/wiki/Cape_Spartel
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Cape Spartel

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/wiki/Lakshadweep_Sea
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Lakshadweep Sea

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/wiki/Dondra_Head
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Dondra Head

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/wiki/Poeloe_Bras
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Poeloe Bras

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/wiki/Queen_Charlotte_Islands
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Queen Charlotte Islands

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/wiki/Baja_California_peninsula
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Baja California peninsula

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/wiki/Stewart_Island/Rakiura
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Stewart Island/Rakiura

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/wiki/North_Cape,_New_Zealand
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North Cape, New Zealand

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/wiki/Marginal_sea
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Marginal sea

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http://marinebio.org/oceans/
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