NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Cannot dispense with the assumed position at sea
From: Gary Harkins
Date: 2004 Feb 18, 19:00 EST
From: Gary Harkins
Date: 2004 Feb 18, 19:00 EST
In a message dated 2/18/2004 12:20:32 PM Eastern Standard Time, jim2@jimthompson.net writes:
Can we plot a celestial sight if we do not have a nearby "assumed position"?
Yes!...3 CLOP's will have a common intersection at only one place on the face of the earth. You can plot these using the GP's of the bodies as the center of the COP and the co-altitude as the radius of the COP. An example of this is a problem used in one of the books I have. It says that you are somewhere on earth and you take these 3 sights and gives the data (date, time, Hs etc....). It then asks "where are you?" At first glance many people think that this is an impossible problem. However, the plots are possible, although a little cumbersome, because of the typical radius' involved.
Gary Harkins C400 #140 "Cygnus"
Website http://www.hometown.aol.com/htycgary/myhomepage/index.html
Harbour Towne Marina, Muskegon, Michigan Slip C-28
Harbour Towne Yacht Club, Life Member
C400 National Association
United States Power Squadrons-JN
NRA Life Member
MCRGO (Michigan Coalition for Responsible Gun Owners)
JPFO (Jews for the Preservation of Firearms Ownership)
Website http://www.hometown.aol.com/htycgary/myhomepage/index.html
Harbour Towne Marina, Muskegon, Michigan Slip C-28
Harbour Towne Yacht Club, Life Member
C400 National Association
United States Power Squadrons-JN
NRA Life Member
MCRGO (Michigan Coalition for Responsible Gun Owners)
JPFO (Jews for the Preservation of Firearms Ownership)
