While underway and in sight of another vessel more than 0.5 miles away, you reverse engines to full astern. Which whistle signal is TRUE?

Study for the Maritime Navigation Rules and Vessel Responsibilities Exam. Study with multiple choice questions including hints and explanations. Prepare effectively for your exam with us!

Multiple Choice

While underway and in sight of another vessel more than 0.5 miles away, you reverse engines to full astern. Which whistle signal is TRUE?

Explanation:
Sound signals communicate your propulsion actions to nearby vessels so they can anticipate your maneuver. When you are underway and you reverse engines to full astern, you convey that specific action with three short blasts. This tells others that you are backing down, which helps prevent misinterpretation in a busy or changing situation. The other options don’t match this particular maneuver—each of those signals corresponds to different communications, not to backing down.

Sound signals communicate your propulsion actions to nearby vessels so they can anticipate your maneuver. When you are underway and you reverse engines to full astern, you convey that specific action with three short blasts. This tells others that you are backing down, which helps prevent misinterpretation in a busy or changing situation. The other options don’t match this particular maneuver—each of those signals corresponds to different communications, not to backing down.

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