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    Re: Determing the bearing off a celestial object.
    From: Francis Upchurch
    Date: 2015 Mar 31, 23:34 -0700

    Thanks Paul,

    That looks good and easy.

    I use my old RDF as my prefered handbearing compass because it it very good, damped in fluid and gimbled against small changes in horizonal position/ocean swell etc. Can you get that with an undamped back-packer's compass? Not sure. Do you know of any fluid damped, accurate handbearing compass with that sort of mirror?

    By the way, for sun Az, I have the compass at waist level and look down onto the mirror, the angle of which can easily be adjusted with  a  thumb to line up the reflection against the verticle, perpendicular line. I never aim directly at the sun.

    Interestingly, I found by chance, last year, with new batteries, my 1980s RDF still works perfectly and I stumbled on several nearby "non directional beacons" (NDB) which give morse signals in the 250-400KHz range and with 3 with adequate spread of Az, I can get a reasonable fix, albeit with a fairly large "cocked hat". I shall try these at sea once I'm back in the water in May. Not sure how much longer the airports will continue broadcasting these NDBs (Gary may know?). I guess this is off topic (topic would be RDF/NDBs?).

    Best wishes


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