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    Re: Sextant shot accuracy: taut wire measuring gear.
    From: Bill Morris
    Date: 2012 Aug 26, 02:45 -0700

    The taut wire measuring gear Mark I, as used by the Royal Navy in the 1960s in surveying, minelaying and mine sweeping operations had 140 miles of 22 gauge steel wire on a drum. The wire was led overboard via a cyclometer wheel and dynamometer and had a sinker on the end. The cyclometer wheel was 6.08 feet in circumference and the counter gear read to 1/1000 of a mile. The accuracy stated in the Admiralty Manual of Navigation was 0.2 percent of the distance run.

    Bill Morris
    New Zealand
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