At 2100 your position is LAT 40°58.5'N, LONG...

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Question 1 of 2066636eea28f7522a1c51ac9b

At 2100 your position is LAT 40°58.5'N, LONG 71°46.0'W. You are proceeding north. At 2131 Montauk Point Light has a radar range of 5.1 miles and bears 284°T. Block Island Southeast Light has a radar range of 10.8 miles. What was the course made good from your 2100 position?

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Question 1 of 20

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🔍 Key Concepts

• Radar range and bearing to a known light to fix your position at 2131 • How to plot a course made good between the 2100 DR position and the 2131 fix • Using the time run (31 minutes) to check that the distance between positions makes sense for a realistic speed

💭 Think About

• From the 2100 position, how would you use the 2131 radar range and bearing to Montauk Point Light to plot your new position on the chart? • Once you have both the 2100 position and the 2131 fix plotted, what line connects these two points, and how do you measure its true course? • Given the time interval of 31 minutes, does the distance between the two plotted positions correspond to a reasonable speed for your vessel on that course?

✅ Before You Answer

• Be sure the bearing is plotted FROM the light TO your ship correctly when using radar range and bearing to get a position • Confirm that the course line is drawn from the 2100 position to the 2131 fix, not the other way around • After measuring the course, quickly estimate the speed made good to see if the distance over 31 minutes is realistic before choosing your answer

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