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Home > Exam Questions > ATPL - Airline Transport Pilot Licence > General Navigation > In flight, the pilot switches off a conventional INS/IRS that cannot perform full navigation realignment in flight, then switches it back on. Which statement is correct?

551 - ATPL Question Bank in English - In flight, the pilot switches off a conventional INS/IRS that cannot perform full navigation realignment in flight, then switches it back on. Which statement is correct?

Question 551 - General Navigation - ATPL - Airline Transport Pilot Licence

no useful information can be obtained from the INS

everything returns to normal and is usable

Navigation alignment is lost; attitude information may still be available using the system’s attitude-recovery mode.

the INS is usable in NAV MODE after a position update

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