NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Set and Drift
From: Bill B
Date: 2006 Jun 6, 19:54 -0400
From: Bill B
Date: 2006 Jun 6, 19:54 -0400
I am at a loss. I've started working through some of the questions on the Coast Guard license exam, navigation section. The following question is giving me fits, as math and graphic solutions are very close but match none of the answers. I cannot find my error(s). 10700. Block Island Sound At 1020 your position is LAT 41s 11.0' N, LONG 71d 50.0 W. You are on course 056d per standard magnetic compass at 9.2 knots. At 1112 your position is LAT 41d 15.9 N, LONG 71d 41.7 W. What were the set and drift? Variation 15 W Deviation 4 E "Per standard magnetic compass" (psc) is defined as, "Your compass heading after you apply TVMDC to the true course." In this case true would be compass C 056(psc) + D 4E - V 15W (W)= 045T CDMVT (add east) Yes? I came up with true course steered of 045d 00.0', COG 51d 52' 16.3" T Set 136 d and drift .95 kn. "Correct" answer is 141d T at 1.2 knots. I cannot find my blunder. Any help would be appreciated. Bill
