When an emergency is declared by an aircraft, the ATS unit should :

a) take all necessary steps to ascertain aircraft identification and type, the type of emergency, the intentions of the flight crew as well as the position and level of the aircraft if necessary;

b) decide upon the most appropriate type of assistance which can be rendered;

c) enlist the aid of any other ATS unit or other services which may be able to provide assistance to the aircraft;

d) provide the flight crew with any information requested as well as any additional relevant information, such as details on suitable aerodromes, minimum safe altitudes, weather information;

e) notify the appropriate ATS units.

Changes of radio frequency and SSR code should be avoided if possible and should normally be made only when or if an improved service can be provided to the aircraft concerned. 

Manoeuvring instructions to an aircraft experiencing engine failure should be limited to a minimum.

An aircraft known or believed to be in a state of emergency shall be given priority over other aircraft.

Upon receipt of advice that an aircraft is making an emergency descent through other traffic, all possible action shall be taken immediately to safeguard all aircraft concerned.

When deemed necessary, air traffic control units shall immediately broadcast an emergency message by means of voice and text modes to pilots and chat windows to other controllers.

ACTION BY THE PILOT-IN-COMMAND : will clear the specified areas and stand by on the radio frequency for further clearances from the ATC unit.

ACTION BY THE AIR TRAFFIC CONTROL UNIT : The CTR, APP or TWR concerned shall forward further clearances to all aircraft involved as to additional procedures to be followed during and subsequent to the emergency descent. The ATS unit concerned shall additionally inform by chat any other ATS units which may be affected.

In case of two-way communication failure, action shall be taken to ascertain whether the aircraft is able to receive transmissions from the air traffic control unit :

a) by chat or private message first (pilot frequency could also be checked via COM? menu).

b) with RW, by requesting it to execute a specified manoeuvre which can be observed by radar or to transmit, if possible, a specified signal (squawkcode) in order to indicate acknowledgement.

If the aircraft fails to indicate that it is able to receive and acknowledge transmissions, separation shall be maintained between the aircraft having the communication failure and other aircraft, based on the assumption that the aircraft will:

a) if in visual meteorological conditions :

1) continue to fly in visual meteorological conditions;

2) land at the nearest suitable aerodrome.

b) if in instrument meteorological conditions or when unable to complete the flight in accordance with a):

1) maintain the last assigned speed and level for a period of 20 minutes and thereafter adjust level and speed in accordance with the filed flight plan;

2) proceed to the appropriate designated navigation aid serving the destination aerodrome and hold, if necessary, over this aid until commencement of descent;

3) commence descent at the expected approach time last received and acknowledged; or, at the estimated time of arrival resulting from the current flight plan;

4) complete a normal instrument approach procedure as specified for the designated navigation aid and land. 

Pertinent information shall be given to other aircraft in the vicinity of the presumed position of the aircraft experiencing the failure.

As soon as a communication failure is known, an ATC shall forward information to all air traffic services units concerned along the route of flight.

2 - PILOTS :

To be published soon.

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