Tindallgrams

Terms & Abbreviations: F

FCD

Flight Control Division.

FCSD

Flight Crew Support Division.

FDAI

Flight Director Attitude Indicator. An instrument in the CM used to keep track of the orientation of the spacecraft. Commonly referred to as the "8-ball".

Fire-in-the-hole

When the LM’s Ascent Propulsion System was fired with the descent stage still attached, for instance if the mission were aborted during lunar landing, this was called ”Fire in the hole. ” The first test of this maneuver was planned for AS-207/208. After that mission was cancelled, it was ultimately tested during the unmanned Apollo 5 mission in January 1968. Nasa produced a short film about Apollo 5 that briefly explains FITH.

FITH

See Fire-in-the-hole

FMES

Full Mission Engineering Simulator.

FOD

Flight Operations Directorate.