Your vessel is entering port when you change...

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Question 1 of 2066636ee928f7522a1c51a5da

Your vessel is entering port when you change course and steady up on a range with the lights in line. After a few minutes you observe the range lights as shown in illustration D047NG below. How should your heading be altered?

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Question 1 of 20

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🔍 Key Concepts

• Range lights alignment: What does it mean when the rear (higher) range light appears to the right of the front (lower) light? • Effect of set and drift: How will a cross current move your vessel relative to the range line if you keep the same heading you started with? • Crabbing into the current: To stay on the range line, should your ship’s heading be the same as the track, or slightly into the current?

💭 Think About

• From your viewpoint entering the harbor, if the rear range light shifts to the right of the front light, are you now to the left or to the right of the intended range line? Sketch a simple plan view if needed. • Once you know which side of the range line you are on, in which direction must you alter course to return to the range line? How does that relate to the words "left" and "right" in the answer choices? • To avoid the same drift happening again, should you keep the range exactly dead ahead, or slightly on one bow? Which bow: the one toward the current or away from it?

✅ Before You Answer

• Be sure you can state clearly: "Rear light right of front means I am on which side of the range line?" • Confirm which way you must steer to regain the range: toward the rear light or away from it. • Before picking an answer, match both parts: (1) correct turn direction, and (2) proper final alignment of the range (dead ahead vs. fine on a specific bow) that will compensate for the cross current.

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