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    Re: Bowditch (2002) Table 17
    From: Gary LaPook
    Date: 2012 May 1, 02:46 -0700
    Table 17 from the 2002 edition was also included in the 1938 edition as table 11 and I have attached the explanation of its use from that edition. It makes sense that this table had its main use for station keeping in convoy, similar to the usage of the dip short of the horizon table.


    --- On Tue, 5/1/12, h.a.c. van Asten <hac.vanasten@gmail.com> wrote:

    From: h.a.c. van Asten <hac.vanasten@gmail.com>
    Subject: [NavList] Re: Bowditch (2002) Table 17
    To: NavList@fer3.com
    Date: Tuesday, May 1, 2012, 12:54 AM

    In the 1940 issue those tables are named no. 8 , 9 & 10 . The no.10 explanation says that for aircraft using the bubble sextant , the observed altitude must be corrected for refraction only (as is always the case for bubble sextants). For conservative celnav , bubble sextants are now (contrary to the 1930-1940 era) commonly in use . Table 9 (1940) was for short distances only , no dip applied . Table 8 (d=1.15 x sqrt h automatically contains horizon dip . Is this possibly the answer to your question ?
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