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> -----Original Message-----
> From: Navigation Mailing Liston Behalf Of George Huxtable
> What I think Jim is looking for is not 4c, but part 5, and maybe part 6.
> The present series ends (at 4b) with the navigator finding his Greenwich
> Time from a lunar. What remains to be written is a final part (or parts)
> showing how he can make observations for Local Apparent Time (at the ship)
> and then derive his longitude from the difference between these times.

George, yes, that's what I was hoping to read.  Everything I've read talks
about how lunars enabled longitude, but they seem to stop there.  They do
not go on to explain how to take the result of the lunar and derive
longitude.

... snipped ...
> Where I have found the greatest difficulty is in covering all these
> different aspects when explaining how to find a lunar longitude, without
> adding a great mass of inclusions and exceptions which would bog
> the reader
> down. I haven't given up, yet.

I suggest keeping it simple:

1. How was it done in Nelson's time?  (We are getting bits of that
information now, in other replies of this thread).
2. How might a backyard or small boat lunartic do it today with a handheld
calculator, following on Frank Reed's "Easy Lunars" method?

> If any Nav-L members are keen on picking up the existing four parts of
> "About lunars" without delving into the archives, then on request I will
> repost those four (longish) messages.

As mentioned already, they are conveniently listed at
http://members.verizon.net/~vze3nfrm/Links.htm

Jim

   

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