Question 18 GLI02 - Mate of Unlimited Tonnage

The Correct Answer is A **Explanation for A (A vessel constrained by her draft):** According to the International Regulations for Preventing Collisions at Sea (COLREGs), Rule 28 (Vessels Constrained by their Draft), a vessel constrained by her draft may, in addition to the lights prescribed for a power-driven vessel underway, exhibit **three all-round red lights in a vertical line**. These lights indicate that the vessel is severely restricted in her ability to deviate from her course because of her draft and the available depth and width of navigable water. **Why the other options are incorrect:** * **B) A vessel moored over a wreck:** A vessel engaged in diving operations or similar work (which might include mooring near a wreck) would typically display the lights appropriate for a vessel restricted in her ability to maneuver (three all-round lights: red, white, red, in a vertical line), or if simply moored, the required anchor lights. Three all-round red lights specifically denote a vessel constrained by her draft, not one moored over a wreck. * **C) A vessel aground:** A vessel aground displays the anchor lights (Rule 30) and, in addition, **two all-round red lights in a vertical line** where they can best be seen. This is different from the three all-round red lights displayed by a vessel constrained by her draft. * **D) A vessel dredging:** A vessel engaged in dredging (or underwater operations) is defined as a vessel restricted in her ability to maneuver (Rule 27). Such a vessel displays three all-round lights in a vertical line: red, white, red. Additionally, when there is an obstruction, she displays two all-round red lights on the side of the obstruction and two all-round green lights on the side where another vessel may pass. It does **not** display three all-round red lights alone.