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Hi folks, please refer to Mixter's " Primer of Navigation" 4th Ed pg 343 art
3008 " Amost Under the sun" where a single timed observation near noon gives
an arc of position which may be crossed with an earlier line or arc advanced
for a running fix. The sun's GHA and Declination  are used for circle of
position centers i.e. the geograpghical position(GP). Also Dutton and Lecky(
Capt. Angus' method) discuss this.
Mike Burkes

>From: Michael Dorl 
>Reply-To: Navigation Mailing List 
>To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
>Subject: Re: Position from crossing two circles : was [NAV-L] Reality
>        check
>Date: Thu, 8 Jun 2006 08:48:06 -0500
>
>At 05:55 AM 6/8/2006, Herbert Prinz  wrote:
>
>>Actually, there is no rigorous method of advancing the circle of equal
>>altitude, but an approximate solution can still be had.
>
>Since one has a good idea of the course and speed between any two
>observations,
>it seems to me the problem is to determine points on the equal altitude
>circles
>separated by that vector.
>
>>How this is to
>>be done properly was shown by A'Hearn and Rossano in Navigation, Journal
>>of the Institute of Navigation, Spring 1977, Vol. 24. For the simple
>>case where both altitudes are taken simultaneously, see S. Howell,
>>Practical Celestial Navigation. Other variants of solutions to the
>>combined altitude problem (by Kotlaric, Dozier, etc.) are described in
>>editions of Bowditch of the late 60s to 80s.
>
>I saw some variant of the Bowditch treatment with the reference to Dozier
>but the
>one I saw was very sketchy and incomplete.  I never did find anything by
>Dozier.

   

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