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    Re: What is this on this sextant
    From: David Pike
    Date: 2016 Feb 20, 12:45 -0800

    Bill Lionheart wrote:  There is a Japanese sextant on ebay http://www.ebay.co.uk/itm/Japanese-Tamaya-Sextant-serial-number-715-/291687942883?hash=item43e9f4cae3:g:TdsAAOSwe7BWt6Kh.  I am intregued about the large triangualr box like structure near the horizon mirror. I wondered if it was some kind of artificial horizon?

    Bill.  The triangular attachment looks exactly like the “System Gago Coutinho” system.  You can read all about its history, advantages, and disadvantages on pages 161-163 and Figures 171 and 172 of Peter Iflands “Taking the Stars”.  The fact that Peter placed this particular device in the “Aircraft Celestial Navigational Instruments” section suggests the sextant on eBay might possibly have an aviation connection. DaveP

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