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2.1.3 The “Operations normal” message shall be transmitted air-ground to an appropriate air traffic services unit
(e.g. normally to the aeronautical telecommunication station serving the air traffic services unit in charge of the flight information region in which the aircraft is flying, otherwise to another aeronautical telecommunication station to be retransmitted as required to the air traffic services unit in charge of the flight information region).
2.1.4 It may be advisable, in case of a SAR operation of a substantial duration, to promulgate by NOTAM the lateral and vertical limits of the area of SAR action, and to warn aircraft not engaged in actual SAR operations and not controlled by air traffic control to avoid such areas unless otherwise authorized by the appropriate ATS unit.
2.2 Air traffic services units

2.2.1 When no report from an aircraft has been received within a reasonable period of time (which may be a specified interval prescribed on the basis of regional air navigation agreements) after a scheduled or expected reporting time, the ATS unit shall, within the stipulated period of thirty minutes, endeavour to obtain such report in order to be in a position to apply the provisions relevant to the “Uncertainty Phase” (Annex 11, 5.2.1 refers) should circumstances warrant such application.
2.2.2 When alerting service is required in respect of a flight operated through more than one flight information region or control area, and when the position of the aircraft is in doubt, responsibility for co-ordinating such service shall rest with the ATS unit of the flight information region or control area:
1)  within which the aircraft was flying at the time of last air-ground radio contact;
2)  that the aircraft was about to enter when last air-ground contact was established at or close to the boundary of two flight information regions or control areas;
3)  within which the aircraft’s intermediate stop or final destination point is located:
a)  if the aircraft was not equipped with suitable two-way radiocommunication equipment; or
b)  was not under obligation to transmit position reports.

2.2.3 The unit responsible for alerting service, in accordance with 2.2.2, shall
—  notify units providing alerting service in other affected flight information regions or control areas of the emergency phase or phases, in addition to notifying the rescue co-ordination centre associated with it;

VII. Flight Information Service and Alerting Service
—  
request those units to assist in the search for any useful information pertaining to the aircraft presumed to be in an emergency, by all appropriate means and especially those indicated in 5.3 of Annex 11 (Use of com-munication facilities);

—  
collect the information gathered during each phase of the emergency and, after verifying it as necessary, transmit it to the rescue co-ordination centre;

—  announce the termination of the state of emergency as circumstances dictate.

2.2.4 In obtaining the necessary information as required under 5.2.2.1 of Annex 11, attention shall particularly be given to informing the relevant rescue co-ordination centre of the distress frequencies available to survivors, as listed in Item 19 of the flight plan but not normally transmitted.
PART VIII. CO-ORDINATION

1. General

1.1 In circumstances where an aircraft is experiencing an emergency or has declared minimum fuel, or in any other situation wherein the safety of the aircraft is not assured, the type of emergency and the circumstances experienced by the aircraft shall be included in the co-ordination message.
2. Co-ordination in respect of the provision of flight information service and alerting service

2.1 Where this is deemed necessary by the appropriate ATS authority or authorities, co-ordination between ATS units providing flight information service in adjacent FIRs shall be effected in respect of IFR and VFR flights, in order to ensure continued flight information service to such aircraft in specified areas or along specified routes. Such co-ordination shall be effected in accordance with an agreement between the ATS units concerned.
　
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