Wrong. You need the Almanac. For a noon sight, you need to know
declination to compute latitude. As for longitude, using the method you
are referring to, you need to convert LMT at time of sight ( reason for
error) to GMT, which you convert to GHA and then longitude. Again, if
you had a clue as to what you were talking about, you would realize that
this method was not all that accurate except in certain cases. LHA is
measured from you WEST, to the body. Go back to reading.

otn

Simple Simon wrote:
Sight Reduction Tables of course. I use HO249 for speed and simplicity.

You must have local hour angle because the sight is always a combination
of local hour angle and zenith. The tables help you to turn the local hour
angle into latitude since the sun moves daily because of the tilt of the
earth as the seasons progress.

S.Simon



"otnmbrd" wrote in message ink.net...

Pleas explain which "tables" you are talking about and what
calculations you are making for sextant altitude and time. You sure you
want LHA?

otn

Simple Simon wrote:

That's it but you need tables. You need tables because you measure
zenith and local hour angle.

S.Simon