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    Re: Researchers spoof GPS signals to alter superyacht'scourse
    From: UNK
    Date: 2014 Apr 29, 11:08 -0700

    Hear, hear! for the trusty hockey puck (http://www.celestaire.com/compasses/mini-2000-compass-detail.html). Simple bearings, and 45°/90° bearings for distance-off, are quick and easy. Throw in ranges (where available) and soundings (if you have an echo sounder) and you can do a lot of sanity checking with minimal effort.
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