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I wrote:

> I think, George, that if you go back to your example where you assumed
> the watch was 30 minutes fast, and simply change the assumed longitude
> to be 7.5 degrees east of the true position, ...

Of course I got this backwards -- the assumed longitude would
be west of the true position in this case (unless I've confused
myself even more).

Then simply use the (erroneous) watch time as if it were GMT
for looking things up in the almanac.  You'll end up with nearly
the same LHA for most bodies, except of course the moon (which
is the point of the exercise).

   

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