NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Longitude calcs
From: mail
Date: 2003 May 6, 22:28 +0100
From: mail
Date: 2003 May 6, 22:28 +0100
Please can someone help me.
I'm sure this has been covered before so please
direct me to the correct archive.
I cannot understand how to calculate a longitude
from a time.
example in book:-
09h 43m 30s
x
60
-------------------
583.5m
x 15 (=15
minutes of arc/minute of time)
----------------
8752.5
divide 60
(minutes/degree conversion).
-------------------
145deg 52.5min
this where I lose it. I make 8752.5 / 60 =
145.875
what is wrong please?
If I enter 145d 52.5 in to a calculator program
it comes out as 9h 43m.30 so the calculation I assume is correct and I am being
stupid help please Gentlemen.
Alistair Barclay
www.adwb.freeserve.co.uk
www.adwb.freeserve.co.uk