Definition: (DOD, NATO) a. command ejection system--A system in which the pilot of an aircraft or the occupant of the other ejection seat(s) initiates ejection resulting in the automatic ejection of all occupants; b. command select ejection system--A system permitting the optional transfer from one crew station to another of the control of a command ejection system for automatic ejection of all occupants; c. independent ejection system--An ejection system which operates independently of other ejection systems installed in one aircraft; d. sequenced ejection system--A system which ejects the aircraft crew in sequence to ensure a safe minimum total time of escape without collision.

