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    Re: Hp by Doniol for Aircraft
    From: Gary LaPook
    Date: 2014 Dec 2, 12:51 -0800
    When you are planning your voyage estimate your time at each waypoint and for a couple of hours either side work up curves for the sun and moon for the day and for several stars at night. See:


    From: Francis Upchurch <NoReply_Upchurch@fer3.com>
    To: garylapook@pacbell.net
    Sent: Tuesday, December 2, 2014 11:36 AM
    Subject: [NavList] Re: Hp by Doniol for Aircraft

    I don't think any of us old romantics are seriously suggesting we do a Chichester as per 1931(he was crazy even then). I never go anywhere on my boat without multiple GPS back-ups, but just like to play with astro, celnav and the old Chichester stuff like Bygraves etc. In an emergency, the GPS rules.
    Anyways, this recent thread on precomputed Hps is fascinating and I intend to try it out on my next boat trip to Scillies. I've already worked out my "waypoints" with the Bygrave and will now also test the Brown-Nassau.
    Best wishes

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