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CapnOz

NavRad tunning

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Wondered for some time how most pilots operate the Nav Rad while flying in the " real " worldI mean do they tune them manually..since there is no auto tune or do they just leave them off?If so what are the exceptions?Thanks

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There's no real need to tune the radios (VOR/ADF receivers) along the way, only during the departure and arrival as backups. For the rest of the flight, the FMC will autotune other stations (preferably DME-DME) to augment and cross-check its position. The manually tuned stations still remain active as well.With the 2 GPSes, the system is very very accurate and the tuning of those station is really not required during normal cruise. To be honest, I can't recall a single story of anyone having to resort to raw data navigation during flight in a modern airliner.

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"While at cruise, both Nav Radios should beoperated in the AUTO position to allow FMC radio updating." This quote is from a real world NG manual. Isn't this raw data?

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