You are underway on course 050°T and your...

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Question 1 of 2066636ee928f7522a1c51a4c8

You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 080°T, 100 miles from your position. The hurricane is moving towards 265°T at 22 knots. What course should you steer at 12 knots to have the maximum CPA?

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🔍 Key Concepts

• Relative motion vectors between your ship and the hurricane (speed and course triangles) • How to construct the hurricane’s track line from its present position using 22 knots on course 265°T • How changing your ship’s course at fixed speed (12 kn) shifts the relative motion line and therefore the CPA

💭 Think About

• On a plotting sheet, where is the hurricane now in relation to your ship, and in what direction is it moving? Sketch that first before thinking about your course. • If you draw your ship’s possible 12‑knot courses as vectors from your position, how does the line of relative motion between you and the hurricane change? Which relative track keeps you farthest from the storm center? • Is the safest track one that aims toward, across, or away from the hurricane’s motion? Think about where the point of closest approach on the relative track will fall.

✅ Before You Answer

• Verify you are plotting true bearings and true courses (not relative) and using consistent units (nm and knots). • Check that your chosen course and 12‑knot speed, combined with the hurricane’s 22‑knot motion, produce a relative motion line that passes at the largest distance from the hurricane’s present position. • Before picking a choice, confirm your plotted solution’s CPA is clearly larger than the alternatives you could sketch near it (slightly more left or right).

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