At 1245 the GPS shows your position to be...

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Question 1 of 2066636eea28f7522a1c51aa87

At 1245 the GPS shows your position to be LAT 41°10.3'N, LONG 72°44.2'W. You are steering a course of 284°T at an engine speed of 13.0 knots. At what time would you expect the New Haven Harbor Outer Range to be in line if you have a current setting 112°T at 1.2 knots?

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Question 1 of 20

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🔍 Key Concepts

• Set and drift of current and how they affect your course and speed over ground • Using vector triangles or plotter methods to combine ship’s speed and current • Determining ETA by dividing distance to go by speed over ground

💭 Think About

• From your 1245 GPS position, plot the course of 284°T and the range line from New Haven Harbor Outer Range. Where do they intersect? • Construct a current vector with set 112°T and drift 1.2 knots, then combine it with your 13.0-knot engine speed to find your speed and track over ground. • Once you know the track over ground and speed over ground, how can you find the time needed to reach the intersection point with the range line?

✅ Before You Answer

• Be sure your current vector is drawn to the correct direction (set) and scale (1.2 knots). • Confirm you are using the resultant track over ground, not just the 284°T heading, to measure distance along the chart. • When converting distance to time, double-check your units: nautical miles and knots so that time comes out in hours, then convert to minutes.

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