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    Re: Compasses and zones. was [NAV-L] Compass Adjustment - A Cautionary tale
    From: Bill Noyce
    Date: 2005 Feb 1, 17:07 -0500

    > Would a modern pilot have any idea how to apply magnetic variation?
    The normal radionavigation beacons, VOR's, transmit a signal that,
    when received in the airplane, identify the bearing from the airplane
    to the beacon.  These beacons are adjusted so the bearing is aligned
    with magnetic north, not true north, I believe.  So, an aeronautical
    map tends to be covered with little compass roses, one at each of
    these beacons, and the airways between them are marked with the
    magnetic heading to follow.
            -- Bill

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