Deck Misc (Supplementary) USCG Question #21 (Set 1)

On 22 November your vessel is enroute from Accra, Ghana to Montevideo, Uruguay. You are on course 240°T and making a speed of 15.0 knots. Your 1129 DR position is LAT 28°25.0' S, LONG 42°40.0' W. You observed 3 celestial bodies. Determine the latitude and longitude of your 1137 running fix.

Official USCG Answer & Rule Citation

Correct Answer: Option B — LAT 28°27.0'S, LONG 42°38.0'W

Calculating the vessel's run over the 8-minute time interval (15 knots multiplied by 0.133 hours equals 2.0 miles along 240°T) and applying this vector to the observed celestial intercepts produces the precise position LAT 28°27.0'S, LONG 42°38.0'W.

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