Visibility becomes variable in patchy fog...

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Question 1 of 2066636ee928f7522a1c51a66c

Visibility becomes variable in patchy fog and you maintain 5 knots speed. At 0610 you sight Montauk Point Light bearing 239°pgc. At 0630 you sight Watch Hill Point Light bearing 333°pgc. What is the position of your 0630 running fix?

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🔍 Key Concepts

• Running fix using two LOPs (lines of position) separated in time • Using speed, time, and course to advance an earlier LOP to a later time • Understanding how a bearings-only position plots relative to nearby charted lights (Montauk Point and Watch Hill Point)

💭 Think About

• From 0610 to 0630, how far do you travel at 5 knots, and in what direction are you assumed to be moving? • When you take the first bearing to Montauk Point at 0610, where is your LOP, and how do you advance that line to 0630? • Once you plot the 0630 bearing to Watch Hill Point and your advanced 0610 LOP, what kind of intersection are you looking for on the chart?

✅ Before You Answer

• Compute distance run between 0610 and 0630 at 5 knots and mark that on your assumed track. • Plot both bearings from the lights to the vessel, not from the vessel to the lights, making sure the angles are correct relative to true/pgc as used on the exam chart. • Verify that the final running fix falls in a plausible location relative to both lights (between Montauk Point and Watch Hill Point on the correct side of Long Island Sound).

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