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An aircraft which is being subjected to unlawful interference shall endeavour to notify the appropriate ATS unit of this fact, any significant circumstances associated therewith and any deviation from the current flight plan necessitated by the circumstances, in order to enable the ATS unit to give priority to the aircraft and to minimize conflict with other aircraft.
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If an aircraft is subjected to unlawful interference, the pilot- in-command shall attempt to land as soon as practicable at the nearest suitable aerodrome or at a dedicated aerodrome assigned by the appropriate authority unless considerations aboard the aircraft dictate otherwise. If the pilot-in-command cannot proceed to an aerodrome as described above, he/she should attempt to continue flying on the assigned track and at the assigned cruising level at least until notification to an ATS unit is possible or the aircraft is within ATS Surveillance coverage.
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When an aircraft subjected to an act of unlawful interference must depart from its assigned track or its assigned cruising level without being able to make radiotelephony contact with ATS, the pilot-in-command should, whenever possible:
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attempt to broadcast warnings on the VHF emergency frequency and other appropriate frequencies, unless considerations aboard the aircraft dictate otherwise. Other equipment such as on-board transponders, data links, etc. should also be used when it is advantageous to do so and circumstances permit; and
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proceed at a level which differs from the cruising levels normally used for IFR flight in the area by 1 000 ft (300 m) if above FL 410 or by 150 m (500 ft) if below FL 410.
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if no applicable regional procedures have been established, proceed at a level which differs from the cruising levels normally used for IFR flight by:
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150 m (500 ft) in an area where a vertical separation minimum of 300 m (1 000 ft) is applied; or
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300 m (1 000 ft) in an area where a vertical separation minimum of 600 m (2 000 ft) is applied.
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