1.1   Aircraft equipment

Commercial air transport aircraft operating in the airspace of Hungary have to adhere to the provisions of ICAO Annex 6 - Operation of Aircraft - Part 1, Chapter 6 - Aeroplane Instruments, Equipment and Flight Documents - and Chapter 7 - aeroplane Communication and Navigation Equipment.

Aircraft, other than state aircraft, operating on the ATS routes within Budapest FIR under instrument flight rules (IFR) above 9500 FT ALT shall be equipped with, as a minimum, RNAV equipment meeting RNPRNAV 5 in accordance with the requirements set out in of ICAO Doc 7030/5 Regional Supplementary Procedures (EUR).

Acceptable means of compliance are set out in the JAA Technical Guidance Leaflet No. 2 rev. 1.

1.2   B-RNAV Contingency Procedures

For B-RNAV equipped aircraft experiencing temporary failure or degradation of the RNAV system below RNP 5, the following procedures apply:

1. Correct operation of the aircraft RNAV system below RNP 5, the following procedures apply:
2. • the routing is in accordance with the clearance; and
   • the aircraft navigation accuracy meets RNP 5
3. If as a result of a failure or degradation of the RNAV system below RNPRNAV5 an aircraft is unable either to enter the airspace designated in ICAO DOC 7030/5, EUR Regional Supplementary Procedures, Para 15.2.1, or continue operations in accordance with the current air traffic control clearance, a revised clearance shall, whenever possible, be obtained by the pilot.
4. Subsequent air traffic control action in respect of that aircraft will be dependent upon the nature of the reported failure and the overall traffic situation. Continued operation in accordance with the current ATC clearance may be possible in many situations. When this cannot be achieved, a revised clearance may be required to revert to VOR/DME navigation. ATC may also provide the aircraft with radar vectors until the aircraft is capable of resuming its own navigation.
5. In case of a failure or degradation of the RNAV system below RNPRNAV 5, which is detected before departure from an aerodrome where it is not practicable to effect a repair, the aircraft concerned should be permitted to proceed, as directly as possible, to the nearest suitable aerodrome where repair can be made. When granting clearance to such aircraft, ATC should take into consideration, the existing or anticipated traffic situation and may have to modify the time of departure, flight level or route of the intended flight. Subsequent adjustments may become necessary during the course of flight. Operators of such aircraft, where a failure or degradation is detected before departure, shall not insert designators „S” ore” in Item 10 of the flight plan. Since such flights require special handling by air traffic control, Item 18 of the flight plan shall contain STS/RNAV INOP.
6. For such aircraft experiencing a failure or degradation of RNAV system below RNPRNAV 5, the following ATC procedures are applicable:
7. • In case of automated messages not containing the information provided in Item 18 of the flight plan, the sending air traffic control unit shall inform the receiving air traffic control unit supplementing the ATC message verbally with the phrase „RNAV UNSERVICABLE” after the call sign of the aircraft concerned.
   • When a verbal co-ordination process is being used, the sending air traffic control unit shall include the phrase „RNAV UNSERVICABLE” at the end of the message.
   • The phrase „UNABLE RNAV DUE EQUIPMENT” shall be included by the pilot immediately following the aircraft call sign, whenever initial contact on air traffic control frequency is established.

1.4   Change from IFR flight to VFR flight

An aircraft electing to change the conduct of its flight from compliance with the instrument flight rules to compliance with the visual flight rules shall notify the appropriate ATS unit that the IFR flight plan is cancelled.

1.5   RVSM operation

As specified in the ICAO EUR Regional Supplementary Procedures (Doc 7030/4 - EUR), Chapter 1, paragraph 1.1.1.2, flights shall be conducted in accordance with Instrument Flight Rules when operated within or above the EUR RVSM airspace.

Therefore, flights operating as General Air Traffic (GAT) within Budapest FIR at or above FL 290, as described in ENR 2.1, shall be conducted in accordance with the Instrument Flight Rules.

3.1   Cruising levels

Flight departing from non-controlled aerodromes for en-route flights may start operation only on possession of a filed flight plan, except when a special airspace portion has been approved for the individual flight.

During the en-route portion of the flight the cruising levels selected as prescribed in para 2 above shall be maintained.

Outside controlled airspace and TRA IFR flights shall not be conducted at an indicated airspeed (IAS) exceeding 250 KTS (460 km/h).

3.2   Communications

All IFR flights leaving the CTR or TIZ shall maintain a continuous listening watch and establish two-way radio communications on the appropriate radio frequency of the Flight Information Centre (FIC).

Identically also the VFR flights operating enroute within the ADIZabove 4000 FT shall maintain radio communication continuous listening watch on the appropriate radio frequency of the FIC., except the agricultural aerial works.

4.1   Area of application

4.2   Flight Procedures

4.3   Airspace Reservation - Special Areas

4.4   Flight Planning (Item 15)

4.5   Route Availability Document