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    Re: The expression "terrestrial navigation"
    From: Henry Halboth
    Date: 2017 Feb 18, 01:34 -0500

    I recall use of the term "geo-navigation" in connection with piloting, as perhaps an obscure reference in some original edition of Dutton. On checking  HO 220. the Navigation Dictionary, I do find listed the term geo-navigation which is defined as "navigtion by means of reference points on the earth. The term is obsolescent." There is no listing in this or any other pub in my possession for the term "terrestrial navigation".  You are nost pobably correct in your assumption that the term origintes within the USCG licencing process, which is probably  not the most professionaly oriended process from a navigation point of view.


    On Fri, Feb 17, 2017 at 5:13 PM, Frank Reed <NoReply_FrankReed@fer3.com> wrote:

    A few more bits on this one. Here are two examples of course listings which I mentioned earlier:
    US Coast Guard Academy course catalog 1975/76:
    "Nautical Science I: An introduction to the rules of the nautical road, relative motion, and terrestrial navigation. Specialized concepts of geography, familiarization with piloting techniques."

    US Naval Academy course catalog 1980/81:
    "Navigation I (2-2-3). Terrestrial navigation including piloting and navigation systems for surface navigation, basic meterology and Inland Rules of the Nautical Road."

    Considering the folks I spoke to say that "everybody uses this expression", I was surprised to find not a single book entitled "terrestrial navigation" except for two exam manuals for USCG licenses (one of the books is not yet published). See the attached search from amazon. That seems to confirm that, at least in English-language usage, this term is primarily emerging from the US Coast Guard licensing process vocabulary, and it is not widespread.

    Frank Reed

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