The 69th VFS has adopted some of the brevity codes currently in use around the world for Falcon4. This helps to make communications easier and to pass information between pilots faster. By utilising the brevity codes described on this page, if you do not fully understand a transmission, you might at least have an idea of what was asked for by your fellow pilots.

ABORT	Directive to cease mission
AFFIRMATIVE	Radio call meaning "Yes"
ANGELS	Altitude of aircrat in thousand of feet. Angels 5 means that the aircraft is at 5,000ft.
ATTACK	Directive to engage a ground target
BANDIT	Confirmed enemy aircraft
BEARING	Direction in degrees from your aircraft
BOGEY	An unidentified aircraft
BREAK LEFT/RIGHT	Directive to execute very hard turn left/right
BUDDY SPIKE	Radio call indication aircraft is locked on by friendly radar
BULLSEYE	An established reference point from which the position of an aircraft can be determined
CONFIRM	Request to confirm. Reply is either affirmative or take corrective action
COPY	Understood previous message
ENGAGE	Directive to engage an enemy aircraft
FAST	Target speed is estimated to be 600 knots ground speed or greater
FOX ONE	A radio call from a friendly aircraft announcing that he is firing a radar-guided missile
FOX TWO	A radio call from a friendly aircraft announcing that he is firing a IR missile
FOX THREE	Radio call indicating launch of AMRAAM/Phoenix missile
HEADING	Direction in degrees you have to steer to
HOT/COLD	Aircraft is facing towards you (hot), or is turning away from you (cold)
MUSIC ON/OFF	Electronic radar jamming on/off
NAKED	No RWR indications. Opposite of term "spike"
NEGATIVE	Radio Call meaning "No"
POSIT	Request for position; response normally in Direction, Distance, Altitude
RADAR CONTACT	You see the target on your radar
RAYGUN	Radar lock-on to unknown aircraft. Request Buddy Spike/Naked reply
ROGER	Radio call indicating you understood and will comply with a request
SAY	Request for angels, heading, fuelstate, status, etc.
SLOW	Target speed is estimated to be lower than 200 knots ground speed
SMOKE ON/OFF	Directive to turn your smoke on/off
SPIKE	RWR indication of threat is displayed. Add clock position, and type of threat if able
VIS ID	Visual contact, you can see the target
WEAPONS FREE	You are authorized to fire at will
WEAPONS HOLD	You may arm your weapons, but not fire them
WEAPONS TIGHT	No weapons may be selected/armed

This is by no means a complete list. But hopefully it will help to not only improve you skills, but also increase your enjoyment of the sim.