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?

Correct Answer: Option D — Immediately alter course to the right to bring the range in line.

Steering 129°T against a 133°T inbound range places the vessel to the left of the intended track. Following standard piloting guidelines for range navigation, the helm must be maneuvered immediately to the right to bring the range markers vertically aligned.