E. Strategic d.el-ivery systens 101. The evolution of guid.ance systens has brought rcBMs fron an accuracy ofsevera]- kilonetres in the 1950s to a stated acctrracy of the orrler of 200 n.{0.1 nrni) now. The provision of robust radio guidance to the nissiles duringboost (or terninal guidance) !rouJ-d. al]ov accuricies to be improved consiaierabLyover the present 200-n. linit, perhaps down to the range of 50n.CEp. ICBM' havealso evol-ved in readiness and contror.r-abirity fron the cryogenically fuelledmissiles, vhich coul-d with difficu-r-ty be fired on 1O-ninule notice, to stors,ble-liquid or sol-id-fuel rnissiles" which can be launchett within a fev second.s afterreceipt of an order.Al3' / 392 lincr ]- s n .toi.* Pa4e l+4 FIGUNE V. A TUAI AND POSSIBI,E FUII'RE DEI'EIOPMEIIT OF MISSILE ACCIJR^CY CEP kn 2nm 1.0)J-b Ti tanII0.5 \ss-9 SS-ll Mod 3 Minutenan / --:_- \< SS-17/-18/-19l II inUtemanj\.... .. -_..-..\ I965 1970 1975 1980 I985 r 990 Estimated developnent of ICBI,I accuracy 1960-90. From Gray' Colin S.: "The Future of Land-Based ltissile Forces", Adelphi Paper No. 140, International lnstitute of strategic Studies, Londonr 1978. It rhould bc notcd that thc csti[etc8 alcscrlb€at W thc graph a:|'cproJections nade in 19?7 anct that tbe cutves do not necessarilyreflect the actual- development after that year.Al35 /392Inglish Ainex i'ase I )
**Analysis**
The text appears to be discussing the evolution of Intercontinental Ballistic Missiles (ICBMs) and their guidance systems, with a focus on their accuracy and readiness. The language used is technical and specific to the field of military technology, suggesting that the text is related to defense or military strategy.

**Category**
Science and Technology, Defense