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    Re: Air vs. water: MOB and MOO table corrections in HO 249
    From: Mark Coady
    Date: 2016 Jan 8, 09:10 -0800

    Speaking of air vs water navigation and pre planned increments.....HO 249 contains correction tables for movement of observer and movement of body.

    If you are doing let's say a group of divergent star sights over a period of say five or ten minutes, which would give you crossing LOP's and thus a fix.  Does it make sense if you have HO 249 handy, to use the tables to adjust the three LOP's to the center sight time based on the "movement of body" table?  "Movement of observer" is probobly less a concern, due to relatively slow body speeds (at least my body is assummed to be on a slow boat).

    I've seen lots of triangulations done, but never saw noted the use of these tables in my reading on marine navigation.  I tend to be methodical and slow in shooting, hence three quick sights in succession might be longer for me than the more experienced or more adept navigators, and have a greater impact on crossing LOP's.

    MC

       
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