Don Casey - Dragged Aboard Storm Tactics Handbook:
Modern Methods of Heaving-To for Survival in Extreme Conditions
by Lin Pardey and Larry Pardey


      

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Re: Question about Davis Mk 25 sextant beam converger

From: Frank Reed (no email)
Date: Sat May 13 2006 - 18:51:51 EDT

  • Next message: George Huxtable: "sextant calibration"

    "what is the "proper" term for the initial accuracy checkout of a sextant
    when it's first acquired? "

    Nothing more than "adjustment". The mirrors have to be set perpendicular to
    the frame. The telescope's axis should be parallel to the frame. It is
    desirable to adjust the index error down to some amount between about 0.5 and 3
    minutes. It's not necessary to do better than that.

    -FER
    42.0N 87.7W, or 41.4N 72.1W.
    www.HistoricalAtlas.com/lunars


  • Next message: George Huxtable: "sextant calibration"



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