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    Figure out LAN?
    From: Samuel L
    Date: 2014 Sep 26, 15:41 -0700

    I'd like to be able to calculate LAN (MP) on paper before taking a Sun sight.

    My Longitude is W 075d 22' 28.7"

    Is this how to do it....as follows?

    Take Longitude, W 075d 22' 28.7" and convert it to time= 5hr 1min 29.91 seconds

    Find Mer. Pass. in the daily pages. For today's date- 9/26/2014 MP is 11:51 UTC

    Next, add the MP of 11:51 to the Longitude converted to time of 5hr 1min 29.91 seconds and get= 16hr 52min 29.91 seconds for the time of MP.

    Is that correct?

    Is there a way to determine LAN without using the daily pages and a sextant? That is- simply taking your exact Longitude and adding or subtracting a certain value?

    Thank you as always.

    Sam

     

       
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