Note.— See Part II, 8.2, for procedures governing submission of a flight plan.
1.4.2.2 Aircraft not using the air traffic advisory service
1.4.2.2.1 Aircraft wishing to conduct IFR flights within advisory airspace, but not electing to use the air traffic advisory service, shall nevertheless submit a flight plan, and notify changes made thereto to the unit providing that service.
Note.— See Part II, 8.2, for procedures governing submission of a flight plan.
1.4.2.2.2 IFR flights intending to cross an advisory route should do so as nearly as possible at an angle of 90 degrees to the direction of the route and at a level, appropriate to its track, selected from the tables of cruising levels prescribed for use by IFR flights operating outside controlled airspace.
1.4.3 Air traffic services units
Note.— Efficiency of air traffic advisory service will depend largely on the procedures and practices in use. Their establishment in line with the organization, procedures and equipment of area control service, taking into account the basic differences of the two services, as indicated in 1.4.2.1.1, will help to ensure a high degree of efficiency and promote uniformity in the various provisions of air traffic advisory service. For example, exchange of information by the units concerned on the progress of an aircraft from one advisory area into an adjacent control area or terminal control area, and vice versa, will help to relieve pilots from repeating details of their flight plans already filed; also, use of standard air traffic control phraseology, preceded by the word “suggest” or “advise”, will facilitate the pilot’s understanding of air traffic advisory service intelligence.
1.4.3.1 An air traffic services unit providing air traffic advisory service shall:
1.4.3.1.1 Advise the aircraft to depart at the time specified and to cruise at the levels indicated in the flight plan if it does not foresee any conflict with other known traffic.
1.4.3.1.2 Suggest to aircraft a course of action by which a potential hazard may be avoided, giving priority to an aircraft already in advisory airspace over other aircraft desiring to enter such advisory airspace.
1.4.3.1.3 Pass to aircraft traffic information comprising the same information as that prescribed for area control service.
1.4.3.2 The criteria used as a basis for action under
1.4.3.1.2 and 1.4.3.1.3 should be at least those laid down for aircraft operating in controlled airspace and should take into account the limitations inherent in the provision of air traffic advisory service, navigation facilities and air-ground communications prevailing in the Region.
2. Alerting service
2.1 Aircraft
Note.— Whenever applied, the procedures for the provision of air traffic control service or air traffic advisory service take the place of the following procedures, except when relevant procedures do not call for more than hourly position reports, in which case the Operations normal procedure applies.
2.1.1 When so required by the appropriate ATS authority to facilitate the provision of alerting and search and rescue services, an aircraft, prior to and when operating, within or into designated areas or along designated routes, shall comply with the provisions detailed in Annex 2, Chapter 3, concerning the submission, completion, changing and closing of a flight plan.
2.1.2 In addition to the above, aircraft equipped with suitable two-way radiocommunications shall report during the period twenty to forty minutes following the time of last contact, whatever the purpose of such contact, merely to indicate that the flight is progressing according to plan, such report to comprise identification of the aircraft and the words “Operations normal” or the signal QRU.
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