1.1.1   Radar service is an integral part of the ATC system within Budapest FIR.

Budapest ACC and Budapest TRCC will normally use radar derived information in the provision of air traffic control services.

1.1.2   Within Budapest FIR radar service is provided by:

1. BUDAPEST CONTROL for aircraft operating under Area Control;
2. BUDAPEST APPROACH for aircraft operating within Budapest TMA;
3. BUDAPEST DIRECTOR for arriving aircraft in Budapest TMA below 7500 feet altitude (as traffic conditions require).
4. BUDAPEST FLIGHT INFORMATION may use radar derived information in the provision for flight information service between 4000 feet and 9500 feet altitude. Radar serves only as an aid to provide aircraft with more accurate flight information. It does not relieve the pilot-in-command of an aircraft of any of his responsibilities and he has to make the final decision regarding any suggested alternation of flight plan.

For more details See ENR 2.1

1.1.3   Communication

The following R/T procedures shall be applied by aircraft operating under radar control within Budapest FIR

1. The initial call after a change of radio frequency shall contain only:
   • aircraft call sign;
   • actual level (with the addition of cleared level for climbing or descending aircraft).
2. Any position report (if required) subsequently shall contain only:
   • aircraft call sign;
   • position;
   • time over (fix)
3. Aircraft being identified after entering controlled airspace are exempted the requirement of subsequent position reporting. Pilots of aircraft shall resume position reporting when:
   • it is instructed by ATC; or
   • crossing the FIR boundary; or
   • are advised that radar service terminated or radar contact lost.

Note: The requirement to report receipt of ATIS broadcast at first contact on 129,700 MHz (APP) when entering Budapest TMA and on 134,550 MHz (Budapest Delivery) before starting up engines by reading back the relevant designator of information and actual QNH is not affected by the above procedure.

1.3.1   Radar failure

In the event of radar failure or loss of radar identity of an aircraft under radar control will be advised immediately of the interruption or termination of radar control and as an emergency measure reduced vertical separation (500 feet at/or below FL410 and 1000 feet above FL410) may be resorted to as necessary until standard non-radar separation can be provided or radar control is resumed.

1.3.2   Radio communication failure

In the case of complete aircraft communication failure the pilot shall carry out the procedures detailed in PANS ATM (ICAO Doc 4444) Chapter 15, paragraph 15.3.

2.3.1   Radio communication failure procedure

In the event of a radio communication failure, a pilot shall select Mode A/C, Code 7600 and follow established radio communication failure procedures. Subsequent control of the aircraft will be based on those procedures.

2.3.2   Transponder failure

1. Prior to departure

   In cases where a transponder has failed and definitely cannot be restored prior to departure, permission to perform the flight without SSR must be obtained from the appropriate ATC unit before departure (See ENR 1.6 para 2.1.3)

   In such cases the letter “N” shall be inserted in item 10 of the ICAO flight plan.

2. After departure

   In cases where a transponder failure occurs during flight pilots may expect that ATC units will endeavour to provide continuation of the flight to the aerodrome of first intended landing in accordance with the flight plan. After landing pilots shall make every effort to have the transponder restored to normal operation. If repair cannot be effected, pilots shall comply with the provisions in item a.) above.

2.3.3   Unlawful interference procedure

See ENR 1.13