Security Annex 17 to the Convention on International Civil Aviation(36)

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1.4.1 The pilot of an aircraft encountering a state of emergency shall set the transponder to Mode A Code 7700 except when previously directed by ATC to operate the transponder on a specified code. In the latter case the pilot shall maintain the specified code unless otherwise advised by ATC.
1.4.2 Notwithstanding the procedures at 1.4.1, a pilot may select Mode A Code 7700 whenever there is a specific reason to believe that this would be the best course of action.
.. . . . .
1.6 UNLAWFUL INTERFERENCE WITH AIRCRAFT IN FLIGHT
1.6.1 Should an aircraft in flight be subjected to unlawful interference, the pilot-in-command shall endeavour to set the transponder to Mode A Code 7500 to give indication of the situation unless circumstances warrant the use of Code 7700.
1.6.2 A pilot, having selected Mode A Code 7500 and subsequently requested to confirm this code by ATC in accordance with 1.1.5 shall, according to circumstances, either confirm this or not reply at all.
Note.— The absence of a reply from the pilot will be taken by ATC as an indication that the use of Code 7500 is not due to an inadvertent false code selection.

— END —
ATT-15 1/7/06

 

ICAO PUBLICATIONS AND RELATED PRODUCTS
IN THE AIR TRANSPORT FIELD

The following summarizes the various publications and related products in the air transport field issued by the International Civil Aviation Organization:
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International Standards and Recommended Practices (SARPs) adopted by the Council in accordance with Articles 37, 54 and 90 of the Convention on International Civil Aviation and designated, for convenience, as Annexes to the Convention. Annex 9 — Facilitation — contains SARPs dealing with customs, quarantine, immigration and health matters concerned with international air navigation. Annex 17 — Security — is composed of SARPs on all matters related to safeguarding civil aviation against acts of unlawful interference. Any differences between the national regulations and practices of a State and what is prescribed by an International Standard must be notified to the Council in accordance with Article 38 of the Convention. The Council has also invited Contracting States to notify differences from the provisions of the Recommended Practices.

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ICAO’s policies on the regulation of international air transport, charges for airports and air navigation services, and taxation in the field of international air transport.

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Technical specifications on machine readable travel documents (MRTDs).

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Tariffs for airports and air navigation services, including charges applied towards users in more than 180 States.

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Manuals providing information or guidance to Contracting States on such issues as regulation of international air transport, financial management of airports and air navigation services, air traffic forecasting methods, and compliance with Annex 17 provisions.
　
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