NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: LAN sight help !!
From: Dan Hogan
Date: 1999 Aug 13, 9:21 AM
From: Dan Hogan
Date: 1999 Aug 13, 9:21 AM
Barry:
The Sun will cross your meridian (Lan) at 20H 15m 12s GMT. Due to the
uncertainty of the longitude it would be best to start looking about 5
minutes earlier. Your ZT of Lan would be:
Zone Description (ZD) = DR-Lon / 15
ZT of LAN = ZD (+West Lon or -East Lon) ~ GMT
I find doing my celestial navigating using GMT removes several steps of
possible errors. So I would start looking for LAN about 5 minutes
before 20 Hr 06m 12s GMT.
>I'm trying to learn Celestial Nav on my own and I have a question
>regarding LAN sights...I understand the concept, the math and the
>conversion of ARC time.BUT for instance:
> mer pass + DR-LON(W) = GMT of LAN
>
> 12h 06m + 8h 09m 12s = 20h 15m 12s
>
>
> How does 20h 15m 12s help me in predicting LAN at my long....Is it
>that simple that I just don't see it..???
Dan Hogan WA6PBY
C27 "Gacha"
dhhogan@nav.cnchost.com
Navigation-L: http://nav.cnchost.com
