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ASSIST - history of the code     (2 фото + 0 видео)

All aviation specialists know acronym ASSIST. Controllers use it in case of emergency.


Maastricht Upper Area Control Centre - MUAC


Maastricht Upper Area Control Centre - MUAC





ACKNOLEDGE the call; get the squawk.

SEPARATE the aircraft from other traffic. Give it room to maneuver.

SILENCE – on the frequency. Provide separate frequency where possible – this prevents unnecessary clutter for the pilots.

INFORM – those who need to know and those who can help; inform others as appropriate.

SUPPORT – the pilots in any way as possible. Start to think alternative routings.

TIME – Give the pilots time to collect their thoughts, don’t harass them for information. Time produces good decisions.


Initially there were some other variants as acronym for such situations.




RECOGNIZE – that there is a problem.

IDENTIFY – the relevant aircraft and arrange for special code SQUAWK.

SEPARATE – give the pilots airspace in which to operate and give them time.

COMMUNICATE – with adjacent sectors/colleagues/supervisor as appropriate.




TIME – give the pilot time to sort out the immediate problem on receipt of first notification that there is a difficulty.

AIRSPACE – give the pilot freedom of the adjacent airspace. Get other aircraft out of the way and off the frequency.

SILENCE – the controller should clear the frequency and not raise more questions than a necessary.




SQUAWK – acknowledge the call. Make sure the correct squawk is produced.

SILENCE – keep the radiotelephony (RTF) to as low level as possible. Where possible – assign a single frequency to the incident.

SEPARATE – provide appropriate and adequate airspace for the pilot to execute any essential maneuvers.

SHOUT – ask for assistance from the ATC supervisor and/or colleagues.


Air traffic over UK


Air traffic over UK





QUEIT - keep the frequency clear (Держать частоту «чистой»)

RECOGNIZE - that there is a problem when the message is received.

SEPARATE - provide airspace.

TIME - give the pilot time to work on it.




ANNOUNCING - and acknowledging the emergency or problem, getting the pilot to make the appropriate squawk

TAQ - giving the pilot time, airspace and quiet.

INFORMATION - exchange pilot/controller and controller/controller.

SOLVING - the problem as a team controller/controller and controller/pilot.


You can see that ASSIST code is the most convenient and readable in case of emergency. That’s why controllers use it all over the world.











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