NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Regarding fix bearings
From: NavList
Date: 2008 Dec 20, 20:53 -0800
From: NavList
Date: 2008 Dec 20, 20:53 -0800
George, thank you for your response. I thought all the discussions are frozen
before Xmas and New Year. Glad I was wrong. ;>
My suggestion regarding two bearings is follows:
As soon as you can see the landmark suitable to take bow bearing-take the
bearing and record the time. Then use the following formula
tan B = tan A / (1-tan A),
B=arctanB
where A-the first bearing
B-the second bearing.
In this case, you take your second bearing (which you calculated as angle B)
at landmark and record the time.
You know the time at A and time at B; you know the speed which means you
calculate the distance travelled. And this distance travelled is equal to
your distance off from landmark at the moment you took second bearing B.
Respectfully,
A-08
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