NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Wind Velocity from Three Drifts
From: Gary LaPook
Date: 2021 Mar 8, 13:05 -0800
From: Gary LaPook
Date: 2021 Mar 8, 13:05 -0800
The standard method to mesure the three heading drifts for U.S. Navy navigiators ws to take a drift on the on course heading, Turn 60 degrees and hold that heading for 2 minutes while taking a drift. and then turn 120 degrees the other way (60 degrees on the other side of the on course heading) for 2 minutes. Then turn 60 degrees back onto the on course heading. There was a standard simbol of this and it simply resulted in retarding the DR by two minutes because the oncourse track was equal to the equalateral triangle created by the heading changes. The off course legs were each two minutes so the on course leg had to also be two minutes.
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