NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Line of Position Fix
From: Alexandre Eremenko
Date: 2012 Oct 18, 15:44 -0400
From: Alexandre Eremenko
Date: 2012 Oct 18, 15:44 -0400
Debra, > Could somebody help me with my problem. > I am learning on my own at present from books on celestial navigation.I > need to get a fix with two lines of position but not sure which > celestial > body other than the sun and the best times of the day to achieve the > fix. In daylight, you have very few options. 1. Use the Sun twice at different times. This causes no problems if you do not move. But this can be used when you move as well, and this is called a "running fix". You have to record your move (dead reconning) as precisely as you can, and then shift your earlier line of position by this amount. To get a fix at the time when the second Sun altitude was taken. 2. Sometimes you can use the Moon as a second body, and (with extreme luck) the Venus:-) But it is really tricky, finding the Venus, when the Sun is visible. Alex.