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    Re: Jupiters moons and time/longitude
    From: UNK
    Date: 2014 Jun 8, 08:07 +0100

    Bruce. Suggest  “The Life of Captain James Cook,” by JC  Beaglehole, also his journals ( the non abridged versions,) also “Endeavour” by Peter Aughton. Also, Maskelyne’s Mariners Guide and the first few Nautical Almanacs. Good for a start. there are others, such as the 1788 book by William Wales that covers the celnav on Swallow and Endeavour in detail, including early use of lunars to get longitude. (no chronometer on either, but plenty of lunars.)

    Happy reading

    Francis

     

    From: NavList@fer3.com [mailto:NavList@fer3.com] On Behalf Of Bruce J. Pennino
    Sent: 08 June 2014 05:41
    To: francisupchurch---.com
    Subject: [NavList] Re: Jupiters moons and time/longitude

     

    Regarding Cook/Endevour, and other great voyages of exploration, I need some summer reading especially about Cook. Recommendations would be much appreciated.

     

    Thanks in advance!


    Bruce













     

    From: Stan K

    Sent: Saturday, June 07, 2014 10:11 PM

    Subject: [NavList] Re: Jupiters moons and time/longitude

     

    Francis,

    There are no cheap 4 inch refractors.  Are you sure it wasn't a 2.4 inch?

    Stan

     

     

    -----Original Message-----
    From: Francis Upchurch <NoReply_Upchurch@fer3.com>
    To: slk1000 <slk1000---.com>
    Sent: Sat, Jun 7, 2014 9:17 pm
    Subject: [NavList] Jupiters moons and time/longitude

    Just got a wonderful 5 inch Newtonian reflector as a retirement present and plan lots of star gazing, including re-set my mechanical watch (grandads circ 1940) via Jupiter moons a la Cook et al Endevour. Tried it a  few years ago with a cheap 4 inch refractor ,but mostly minutes (time ) out). Anybody had any success and /or advice? I found lunars more accurate so far, but hope this better telescope may improve things? Obviously land based method, unless anyone has ideas re gyro stabalized mount for telescope? The thought had occured, bit like the various crazy chairs tested by the longitude board! Do you think the time may be ripe for another go at this?

    Francis

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