NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: My plotting board
From: Gary LaPook
Date: 2015 May 6, 18:50 +0000
From: Samuel L <NoReply_SamuelL@fer3.com>
To: garylapook@pacbell.net
Sent: Wednesday, May 6, 2015 9:31 AM
Subject: [NavList] Re: My plotting board
From: Gary LaPook
Date: 2015 May 6, 18:50 +0000
You're right, a minute of longitude at 40 degrees is 67 feet shorter than one at 39 degrees. When your sextant observations become so accurate that this becomes an issue, let us know.
gl
From: Samuel L <NoReply_SamuelL@fer3.com>
To: garylapook@pacbell.net
Sent: Wednesday, May 6, 2015 9:31 AM
Subject: [NavList] Re: My plotting board
I just found a Mercator sheet which already has the Longitude degree marks. Nice idea.
A problem I'm curious in solving is if my AP Latitude is N40° and the AP Longitude is W075° must a fix that results between N39° and N40° be interpreted based on the N39° Latitude/Longitude scale? As the fix is South of N40° the Longitude must expand a bit which will give a different fix.
Sam Lohengrin
