Joint Strike Fighter: The Joint Strike Fighter (JSF) Sequencer is a subsequent version of the NACES FAST Sequencer. The unit is a physically repackaged set of electronics that has been missionized to perform the JSF Ejection Seat recovery function via firmware changes. This configuration removes the sensors that measure ram air via a pitot system and relies on a set of redundant 3 axis accelerometers to determine air speed. This in combination to continuous sensing makes the JSF Sequencer the latest advancement in aircrew safety. To date over 450 units have been delivered to USN/USAF/USMC/FMS users.