NavList:

Hello Frank,

Thank you very much for your comments.

I agree with you that GHA is another way of measuring longitude.  As a matter of fact, measuring longitude from zero to 360 degrees is much easier to use than the conventional East or West longitudes. I would also prefer to measure latitudes (or declinations) from zero (at the north pole) to 180 at the south pole.

In any case, for someone outside the celestial navigation world, for example a pilot (and I am one of them), it would not make any sense to read a longitude of 320 West, and no navigational system would accept an entry of a longitude higher than 180 degrees. (or higher than 90 degrees in latitude).

It would be interesting to me if anyone in the group knows when and why the latitude and longitude coordinate system was designed the way we know it.

Thanks!!!!!