Question 47 MODU01 - Offshore Installation Manager

The Correct Answer is D **Explanation for Option D (Correct Answer):** The required fog signal for a vessel or object being towed (manned or unmanned, if the tow is longer than 200 meters, but the question specifies a manned vessel being towed) is defined by Rule 35(e) of the International Regulations for Preventing Collisions at Sea (COLREGs), which applies to both International and Inland waters (as Inland rules typically mirror COLREGs for fog signals unless specifically exempted). Rule 35(e) states: "A vessel being towed may give, at intervals of not more than 2 minutes, one prolonged followed by three short blasts." This signal indicates the presence of the towed vessel and its relationship to the towing vessel (which is giving the standard power-driven vessel signal: one prolonged blast). **Explanation for Incorrect Options:** **A) One prolonged followed by two short blasts:** This is the fog signal required for a vessel not under command, a vessel restricted in its ability to maneuver, a vessel constrained by its draught, a sailing vessel, or a fishing vessel. It is not the signal for a vessel being towed. **B) Two prolonged blasts:** This is the fog signal required for a vessel when stopped and making no way through the water (but still underway) when heard forward of the beam by another vessel. It is often used by pilot vessels, but it is not the signal for a vessel being towed. **C) One prolonged followed by one short blast:** This is the fog signal required for a vessel at anchor. It is not the signal for a vessel being towed. (Note: A vessel at anchor must also ring the bell rapidly for 5 seconds at intervals not exceeding one minute.)