From your 1210 position, you are making good...

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Question 1 of 2066636eea28f7522a1c51aa79

From your 1210 position, you are making good a course of 083°T. Your engines are turning RPMs for 10 knots. The set and drift of the current are 310° at 1.7 knots. At what time should you expect to enter the red sector of New London Harbor Light?

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Question 1 of 20

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🔍 Key Concepts

• Set and drift and how they affect your course and speed made good • How to construct and use a current triangle / vector triangle on the chart • Using distance = speed × time with speed made good through the water vs over the ground

💭 Think About

• First, if your engines are turning for 10 knots but you have an opposing or aiding current, what is your actual speed over the ground along your track? • How will you combine your intended course (083°T) with the current set 310° at 1.7 knots to find the resulting ground track and speed? • Once you know your speed over the ground and the distance from the 1210 position to the red sector limit of New London Harbor Light, how do you convert that distance into minutes of time?

✅ Before You Answer

• Be clear on the difference between speed through the water (engine RPMs) and speed over the ground (affected by current) • Verify you have used the correct direction for set (where the current is flowing toward, not from) when drawing your current vector • Double-check your distance measured on the chart from the 1210 position to the point where your track first enters the red sector boundary line before converting to time

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