Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 4151

b) when an expected communication from an aircraft has not been received within a time period such that the occurrence of a communication failure is suspected. Note.— A specific time period may be prescribed by the appropriate ATS Authority. 5.2.2.7.2.3 Recommendation.— If the attempts specified in 5.2.2.7.2.1 fail, the aeronautical station should transmit messages addressed to the aircraft, other than messages containing air traffic control clearances, by blind transmission on the frequency(ies) on which the aircraft is believed to be listening. 5.2.2.7.2.4 Blind transmission of air traffic control clearances shall not be made to aircraft, except at the specific request of the originator. 5.2.2.7.3 Notification of communications failure. The air-ground control radio station shall notify the appropriate air traffic services unit and the aircraft operating agency, as soon as possible, of any failure in air-ground communication. 5.2.3 HF message handling 5.2.3.1 General 5.2.3.1.1 PANS.— When operating within a network, an aircraft station should, in principle, whenever communications conditions so permit, transmit its messages to the stations of the network from which they can be most readily delivered to their ultimate destinations. In particular, aircraft reports required by air traffic services should be transmitted to the network station serving the flight information centre or area control centre in whose area the aircraft is flying. Conversely, messages to aircraft in flight should, whenever possible, be transmitted directly to the aircraft by the network station serving the location of the originator. Note.— Exceptionally, an aircraft may need to communicate with an aeronautical station outside the network appropriate to its particular route segment. This is permissible, provided it can be done without interrupting the continuous watch with the communication network appropriate to the route segment, when such watch is required by the appropriate ATS Authority, and provided it does not cause undue interference with the operation of other aeronautical stations. 5.2.3.1.2 PANS.— Messages passed from an aircraft to a network station should, whenever possible, be intercepted and acknowledged by other stations of the network, which serve locations where the information is also required. Note 1.— Determination of the arrangements for dissemination of air-ground messages without address will be a matter for multilateral or local agreement. Note 2.— In principle, the number of stations required to intercept are to be kept to a minimum consistent with the operational requirement. 5.2.3.1.2.1 PANS.— Acknowledgement of intercept should be made immediately after the acknowledgement of receipt by the station to which the message was passed. 5.2.3.1.2.2 PANS.— Acknowledgement of an intercept message should be made by transmitting the radio call sign of the station having intercepted the message, followed by the word ROGER, if desired, and the call sign of the station having transmitted the message. 5.2.3.1.2.3 PANS.— In the absence of acknowledgement of intercept within one minute, the station accepting the message from the aircraft should forward it, normally over the aeronautical fixed service, to the station(s) which have failed to acknowledge intercept. 5.2.3.1.2.3.1 PANS.— If, in abnormal circumstances, forwarding is necessary using the air-ground channels, the provisions of 5.2.2.3.4 should be observed. 5.2.3.1.2.4 PANS.— When such forwarding is done over the aeronautical fixed telecommunication network, the messages should be addressed to the network station(s) concerned. 5.2.3.1.2.5 PANS.— The station(s) to which the messages have been forwarded should carry out local distribution of them in the same way as if they had been received directly from the aircraft over the air-ground channel. 5.2.3.1.2.6 The aeronautical station receiving an airreport or a message containing meteorological information transmitted by an aircraft in flight shall forward the message without delay: 1) to the air traffic services unit and meteorological offices associated with the station; 2) to the aircraft operating agency concerned or its representative when that agency has made a specific request to receive such messages. 5.2.3.1.3 PANS.— The provisions of 5.2.3.1.2 should also be applied, if practicable, in non-network operation. 24/11/05 No. 80 2007/70/II. szám Chapter 5 Annex 10 — Aeronautical Telecommunications 5-17 1/11/01 5.2.3.1.4 Recommendation.— When a message addressed to an aircraft in flight is received by the aeronautical station included in the address, and when that station is not able to establish communication with the aircraft to which the message is addressed, the message should be forwarded to those aeronautical stations on the route which may be able to establish communication with the aircraft. Note.— This does not preclude the transmission by the forwarding aeronautical station, of the original message to the aircraft addressed, if the forwarding station is later able to communicate with that aircraft. 5.2.3.1.4.1 Recommendation.— If the aeronautical station to which the message is addressed is unable to dispose of the message in accordance with 5.2.3.1.4, the station of origin should be advised. 5.2.3.1.4.2 The aeronautical station forwarding the message shall amend the address thereof, by substituting for its own location indicator the location indicator of the aeronautical station to which the message is being forwarded. 5.2.3.2 Transmission of ATS messages 5.2.3.2 to aircraft 5.2.3.2.1 PANS.— If it is not possible to deliver an ATS message to the aircraft within the time specified by ATS, the aeronautical station should notify the originator. Thereafter, it should take no further action with respect to this message unless specifically instructed by ATS. 5.2.3.2.2 PANS.— If delivery of an ATS message is uncertain because of inability to secure an acknowledgement, the aeronautical station should assume that the message has not been received by the aircraft and should advise the originator immediately that, although the message has been transmitted, it has not been acknowledged. 5.2.3.2.3 PANS.— The aeronautical station, having received the message from ATS, should not delegate to another station the responsibility for delivery of the message to the aircraft. However, in case of communication difficulties, other stations should assist, when requested, in relaying the message to the aircraft. In this case, the station having received the message from ATS should obtain without delay definite assurance that the aircraft has correctly acknowledged the message. 5.2.3.3 Recording of air-ground communications 5.2.3.2 on teletypewriter 5.2.3.3.1 PANS.— When recording on teletypewriter, the following procedure should be used:

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