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    Re: Frank Worsley's Sextant: the certificate
    From: Greg Rudzinski
    Date: 2014 May 23, 16:57 -0700

    Good catch Orjan.

    There must be a typo of some kind. At the equator 4 seconds of time equals 1' ( 1 nautical mile). For Worsley's the chronometer error seconds has to be multiplied by the cosine of the latitude then divided by four. That's about 0.6' per 4 seconds of time as I see it. I don't think there was much of a chronometer problem as long as the 11 minutes and 55 seconds was applied to the chronometer. Worsley would have surely done this.

    Greg Rudzinski

    Re: Frank Worsley's Sextant: the certificate
    From: Örjan Sandström
    Date: 2014 May 23, 16:10 -0700
    Uhm. 5 seconds of time is closer to 1' then the 20' given in the document, but that is me speaking. as far ad i know the rule of thumb is 4 seconds to 1' so things seem switched around there.

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