Question 3455 Deck General

70% to pass

What signal must be sounded by a vessel towing a mobile offshore drilling unit through an area of restricted visibility?

A One prolonged and three short blasts
B Two prolonged blasts
C One prolonged and two short blasts
D Five or more short blasts
AI Explanation

The correct answer is C) One prolonged and two short blasts. This signal is required by the International Regulations for Preventing Collisions at Sea (COLREGS), which govern navigation rules for vessels. Specifically, Rule 27(b) states that a vessel towing another vessel shall sound "one prolonged blast followed by two short blasts" when the vessel is not under command, restricted in its ability to maneuver, or towing another vessel. The other answer choices are incorrect because they do not match the specific signal required by the COLREGS for a vessel towing another vessel in restricted visibility.

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