At 0600 zone time, on 16 March your DR...

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Question 1 of 2066636eea28f7522a1c51a867

At 0600 zone time, on 16 March your DR position is LAT 20°10.0'N, LONG 81°30.0'W. You are steering course 300°T. The speed over the ground is 10 knots. You observed 3 morning sun lines. Determine the latitude and longitude of your 1130 running fix. Zone Time GHA Observed Declination Altitude 0800 12°50.0' 19°00.0' S 01°38.8' 1030 50°20.4' 51°42.0' S 01°36.5' 1130 65°20.5' 62°11.5' S 01°35.5'

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🔍 Key Concepts

• Running fix using multiple sun lines at different times • Converting zone time to GHA and LHA then plotting/interpreting intercepts • Advancing earlier LOPs (lines of position) to a common time using course and speed

💭 Think About

• How far (in nautical miles) does the vessel travel between 0600 and each observation time at 10 knots, on course 300°T? • When you advance the 0800 and 1030 LOPs to 1130, how will their positions shift relative to your track line? • After plotting all three LOPs at 1130, what is the most likely latitude/longitude of their intersection compared with your DR position at 1130?

✅ Before You Answer

• Be sure you advance all LOPs to the same time (1130) using the given course and speed. • Check that your DR track from 0600 to 1130 is correctly laid out before applying any celestial intercepts. • Compare your final running fix with the 1130 DR position to see if the offset (both in distance and direction) is reasonable for the intercepts you found.

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