Two On A Big Ocean The Story of the First Circumnavigation
of the Pacific Basin
in a Small Sailing Ship

      

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Hal Roth
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Re: query

Subject: Re: query
From: Mitch B Burrill (MBurrill@XXX.XXX)
Date: Wed Aug 21 2002 - 14:54:25 EDT

Thanks Michael,
It would be constant TC. Sorry, but I only discovered what a rhumb course was a few hours ago.
I am rapidly becoming obsessed with navigation !

Mitch

Mitch Burrill
mburrill@XXX.XXX

 -----Original Message-----
From: Michael Wescott [mailto:wescott_mike@XXX.XXX]
Sent: Wednesday, August 21, 2002 2:43 PM
To: NAVIGATION-L@XXX.XXX
Subject: Re: query

Mitch B Burrill writes:
> If I am at lat1, long1, and go XXX nm at TC YYY, What is the exact
> formula from spherical trigonometry to get lat2, long2 ?

I would argue that the problem is not sufficiently well specified.

Is TC=YYY merely the initial course for a Great Circle trip during
which the course will generally vary as the trip progresses. Or is TC
to remain constant for the whole trip, i.e. a rhumb line course? Or
something else altogether? 

--
        Mike Wescott
        Wescott_Mike@XXX.XXX



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