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    Re: L'Hermione en route to America next summer
    From: Fred Hebard
    Date: 2014 Nov 19, 17:57 -0500

    lunars for sure.  Connaissance_des_Temps was started in the 1680s or so.  The 
    Nautical Almanac was not a state secret then, but would have been now.
    
    
    Fred Hebard
    mbiew---.net
    
    
    
    On Nov 19, 2014, at 4:41 PM, Don Seltzer wrote:
    
    > 
    > On Wed, Nov 19, 2014 at 11:51 AM, Frank Reed 
    >  wrote:
    >  >But will anyone practice the type of navigation that would
    > > have actually been used in 1780? Maybe at least for a few demonstrations...
    > 
    > What level of celestial navigation would have been practiced aboard a
    > typical French frigate in 1780?
    > My guess is that it would have been limited to noon observations of
    > latitude, with navigation primarily dependent upon dead reckoning.  No
    > chronometer, and probably no use of lunars for determining longitude.
    > Every hour they would heave the chip log, recording speed and compass
    > direction.  At noon, the master would observe the sun, if visible, for
    > latitude and enter into the log the latitude by observation and both
    > the latitude and longitude by account (from the dead reckoning
    > calculations).
    > 
    > Don Seltzer
    > 
    > 
    > View and reply to this message
    > 
    
    

       
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