Question 1831Navigation General

70% to pass

You are inbound in a channel marked by a range. The range line is 133° T. You are steering 129° T and have the range in sight as shown in illustration D048NG below. Which action should you take?

Diagram for USCG Navigation General: You are inbound in a channel marked by a range. The range line is 133° T. You...
A Immediately alter course to the left to bring the range in line.
B Immediately alter course to 133° T if the range is closing.
C Continue on the present heading until the range is in line then alter course to the right.
D Immediately alter course to the right to bring the range in line.
AI Explanation

The correct answer is D) Immediately alter course to the right to bring the range in line. The reasoning is that when running on a range, the vessel should steer to keep the range line centered and in line. Since the range line is 133°T and the vessel is steering 129°T, the vessel is to the left of the range line. To bring the range back in line, the vessel should immediately alter course to the right to 133°T. The other options are incorrect because: A) Altering to the left would take the vessel further off the range line; B) Altering to 133°T without the range closing would put the vessel off the range line; C) Continuing on the present heading would keep the vessel off the range line.

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