2.4.1 Radar failure

In the event of radar failure or loss of radar identification, instructions will be issued to restore non-radar standard separation and the pilot will be instructed to communicate with the parent ATS unit.

2.4.2 Air-ground communication failure

2.4.3 Radio communication failure procedure

In the event of an apparent radio communication failure, the pilot of an aircraft should:

1. Maintain Terrain Clearance at all times;
2. Squawk 7600;
3. Contact appropriate alternate and secondary published ATS frequencies;
4. Check aircraft communications equipment;
5. Listen to ATIS;
6. Broadcast intentions (assuming aircraft transmitter is functioning) and prefix transmission with "TRANSMITTING BLIND"

If a pilot of an aircraft is flying in VMC and is certain that VMC can be maintained, the pilot should:

1. Continue to fly in VMC;
2. Land at the nearest suitable aerodrome;
3. Report arrival by the most expeditious means to the appropriate ATC unit.

If the pilot of an aircraft is flying in IMC or is uncertain that a VMC can be maintained, the pilot should:

1. Maintain the last assigned speed and level, or minimum flight altitude if higher, for a period of three (3) minutes following:
   1. the last assigned level or minimum flight altitude is reached; or
   2. the last time the transponder is set to Code 7600;

   whichever is later, and thereafter adjust level and speed in accordance with the filed flight plan; or

2. If being vectored, proceed in the most direct manner possible to rejoin the current flight plan route no later than the next significant point, taking into consideration the applicable minimum flight altitude;
3. When on arrival, follow (1) and (2) as applicable, then:
   1. proceed according to the current flight planned route to appropriate designated navigation aid or fix, if necessary, to ensure compliance with (b) below;
   2. commence descent from the navigation aid or fix specified in (a) at, or as close as possible to, the expected approach time (EAT) last received and acknowledged; or, if no EAT has been received and acknowledged, at, or as close as possible to, the estimated time of arrival (ETA) resulting from the current flight plan;
   3. complete a normal instrument approach procedure as specified for the designated navigation aid or fix; and
   4. land, if possible, within 30 minutes after the ETA specified in (b) or the EAT, whichever is later.

   Note: In the event of Radio Failure, routing to or established in the hold, the STAR listed below is to be followed depending on flight planned or last cleared navigation fix and Runway in use at designate, Hamad International or Doha International Airport.
   
   1. Landing at Hamad International Airport
   a. Runway 34R:
   - BAYAN 1E
   - MODED 1E
   - GINTO 1E
   
   b. Runway 16L:
   -BAYAN 1M
   -MODED 1M
   -GINTO 1M
   
   2. Landing at Doha International Airport
   a, Runway 33
   -BAYAN 1N
   -MODED 1N
   -GINTO 1N
   
   b. Runway 16
   -BAYAN 1S
   -MODED 1S
   -GINTO 1S