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    Re: Pub 229
    From: Greg Rudzinski
    Date: 2017 Dec 7, 15:37 -0800

    Chris,

    I don't see any mistake. The assumed latitude for Pub 229 in your example has to be 44°north (not 44° 30' north) therefore your intercept will be 30 NM away from 44° north and 73° 18.7' west . The LOP plots right through your actual position of 44° 30' N   73° 15' W.

    A further exercise for you would be to try a reduce by ex-meridian since you are only 2° from local apparent noon (LAN).

    Greg Rudzinski

    P.S. Not posted was some critical data: Date 20 August 2017 and Sun Hs by bubble octant (no limb used).

    From: Chris Caswell
    Date: 2017 Dec 7, 14:12 -0800

    Hi Robert,

    Thank you for your offer - the sight info is as follows:

    AP: N 44° 30', W 73° 15'   (Actual position is N 44° 30.5', W 73°15.5')

    Hs: 57° 40.5'

    Ho: 57° 40' with refraction and parallax corrections

    GMT: 17:04:31, no watch error

    Dec: 12° 12.7'

    GHA: 75° 18.7'

    LHA 2° whole integer, actual 2° 3.7'

     Zn: 183.7°

    Hc Final: 58° 10.1'

    Chris in VT

       
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