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    Use of AH for professional navigation
    From: Magnus Sjoquist
    Date: 2011 Oct 5, 22:43 -0700

    Dear All -
    AH's are not only for desert/Arctic Navigation or for backyard training.
    They are also provide means for 24hour astronav on the High Seas.

    (Combined with dark-vision telescope we are talking about costs around 10.000 USD or more which normally is out of range for private (or students) budgets)).

    Best!
    Magnus Sjoquist
    (Thanking You All for very interesting reading on this and other matters).
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