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    Re: Wonderful Lunar Method by Sir F. Chichester addressed here before ?
    From: Gary LaPook
    Date: 2011 Jun 7, 10:06 -0700
    I don't recall this being discussed in the past on Navllist but we have discussed the similar method of getting a star fix and then adjusting the assumed time to make a moon line pass through the star fix. This method will provide a longitude and GMT (which is better than nothing and may be good enough) but the objection was that the precision of the derived GMT/ longitude suffers due to observational errors and also due to the slow change in the position of the Moon.Chichester's method would suffer from some of these same problems and would lack the accuracy of the traditional Lunar but also may be "good enough."

    gl

    --- On Tue, 6/7/11, Antoine Couette <antoine.m.couette{at}club-internet.fr> wrote:

    From: Antoine Couette <antoine.m.couette{at}club-internet.fr>
    Subject: [NavList] Wonderful Lunar Method by Sir F. Chichester addressed here before ?
    To: NavList@fer3.com
    Date: Tuesday, June 7, 2011, 8:38 AM

    Hello to all,


    Thanks to the highly appreciated courtesy from Douglas Denny - thanks again Douglas - I just learnt about a very clever Lunar Method devised by Sir Francis Chichester.

    In spite of a few shortfalls, quite well identified by Mr D.H. SADLER in the enclosed article, this Method is very simple and elegant and it frees us from the traditional cumbersome "classical" Lunar computations.

    Two questions then :

    1 - Has this method been already addressed within NavList, and - if so - when and where ?

    2 - The use of the Chichester's Lunar Method rules out some specific configurations which can otherwise be dealt upon through Classical Conventional methods. Outside such limitations (e.g. "non meridian" Sun) quickly spotted by M. Sadler, what really puzzles me is that the Chichester's Lunar Method seems to be very powerful in the exact "magic" configuration already pointed out by Frank E. Reed (i.e. Moon and Sun {at} 90° apart). Any ideas about that, Frank ?

    Best Regards to all


    Antoine M. "Kermit" Couëtte


    PS : Enclosed is a scanned copy from the UK Institute of Navigation (year 1966).

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