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    Re: Tamaya Venus MS-933
    From: Omar Reis
    Date: 2004 Dec 22, 18:46 -0200
    Interesting test and impressive results for that sextant.
    Your data made me wonder about which
    horizontal datum is best to be used in the GPS 
    for this kind of test.
    I assume that WGS84, being a global datum
    - as apposed to local datums used in charts -
    is best and closest to the spheric model used
    in celnav. But I'm not sure.
    ----- Original Message -----
    From: Dan Allen
    Sent: Wednesday, December 22, 2004 1:25 PM
    Subject: Re: Tamaya Venus MS-933

    I have a Tamaya Venus sextant and I think it is a terrific little unit.  It is very well made and has a good feel to it.  It does feel rather small compared to full-sized sextants, but I have large hands.
    On land I did some shots of the sun with it and compared them to my actual GPS position, and here were the results:
    2.73 nmi
    -0.46 nmi
    -0.83 nmi
    -0.31 nmi
    -0.86 nmi
    -0.53 nmi
    -0.99 nmi
    -1.58 nmi
    -0.74 nmi
    -0.51 nmi
    -0.23 nmi
    -0.85 nmi
    -0.55 nmi
    -0.54 nmi
    for an average error of -0.44 nmi.  Not bad.
    -----Original Message-----
    From: Navigation Mailing List [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM]On Behalf Of Yourname Here
    Sent: Wednesday, December 22, 2004 5:35 AM
    Subject: Re: Tamaya Venus MS-933

    In those days my company Nautech Maritime Corporation was the importer of all Tamaya navigation instruments and was instrumental in the design of the MS 733, 833, 933, and NC 2 Navigation calculator. Ken Gebhart used to buy his Tamaya sextants from us as did all other companies. We are still incontact with the past owner of Tamaya today.
    Here is a link to what I recalled about the first Venus sextant that was sent us as a pre-production sample. It was never a big seller, maybe because I didn't beleive in reduced size sextants. There was a discussion about their limitations by this group.
    BTW, Nautech was sold to Coast Navigation in Sept, 1978, and  in Nov, Julie and I embarked on six years of ocean cruising in our 62 foot ketch, Bagheera.
    All great memories. Merry Christmas,
    Joel Jacobs
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