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    Re: minus index corr better than plus
    From: Aubrey O?Callaghan
    Date: 2000 Jul 27, 09:32 EDT

    Why do you talk about getting it serviced ?
    This is an adjustment that the Navigator can make to the sextant. The text
    books say that one should not worry about a few minutes, to try and correct
    this. Correcting out small off/on the arc erros are called "worrying the
    sextant" and eventually end up with the adjusting screws becoming "loose".
    In any case we calulate out the small differences.
    t 07:04 PM 26-07-00 -0700, you wrote:
    >On 25 Jul 2000, at 15:18, Russell Sher wrote:
    >[Snip OFF/ON Stuff]
    > >
    > > If the error is on the arc Subtract it, if the error is off the arc ADD it.
    > >
    >I just looked at my FREIBERGER Sextant. It has 5 degree marks below the
    >zero. If it was off more than that, I would not use it, but get it
    >serviced. What type of Sextant, with out marking below Zero are we talking
    >Dan Hogan
    >NAV-L Web Page: http://nav.cnchost.com
    Aubrey O'Callaghan
    Wandrin' Star of Dart
    Rival 38
    Contact: Venezuela,
    Puerto La Cruz
    00-58-14 210 4625 (Cellular)
    00-58-81 818 667

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