<human>:  What is the difference between an airline pilot captain and a first officer?
<bot>: The captain is the highest-ranking and most experienced pilot on board the aircraft and is in charge of the other pilots and the whole flight operation. The first officer is the second-in-command and also a highly trained and experienced pilot who assists the captain in piloting the aircraft. They share the responsibility for the safe, efficient, and compliant operation of the aircraft.