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Home > Exam Questions > ATPL - Airline Transport Pilot Licence > Radio Navigation > Which statement correctly describes the use of the 4,096 selectable four-digit octal aircraft identity codes?

342 - ATPL Question Bank in English - Which statement correctly describes the use of the 4,096 selectable four-digit octal aircraft identity codes?

Question 342 - Radio Navigation - ATPL - Airline Transport Pilot Licence

They exist only as the 24-bit Mode S aircraft address.

They are the Mode A identity codes, and the same code can also be carried in Mode S identity replies.

They are used only to encode Mode C pressure altitude.

They can be transmitted only in Mode A and never in a Mode S reply.

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