Question 39 GLI08 - Limited OUPV

The Correct Answer is B ## 2. Explanation of why option B is correct: **Option B) need not show the lights for a vessel engaged in towing, if it is impractical to do so** This statement is correct because it addresses the special circumstances of a vessel (a "vessel of opportunity") that is not structurally equipped for routine towing but is doing so in an emergency (towing a vessel in distress). 1. **COLREG/Inland Rule 24 Exceptions:** While the general rule (Rule 24) mandates specific masthead lights and a towing light for a vessel engaged in towing, both International and Inland Rules contain provisions allowing for practical exceptions when full compliance is impossible. 2. **Impracticality:** A vessel that does not normally tow (e.g., a yacht, a cargo ship) may not have the necessary equipment or structural arrangement (like a second or third masthead light vertically spaced as required) to show the full set of towing lights immediately. 3. **Waiver:** In these specific circumstances, navigational rules permit the vessel to display its standard running lights (Rule 23), provided it takes all possible measures to indicate the nature of the operation. This exemption recognizes that requiring immediate, non-standard modifications to a vessel during an emergency tow is unreasonable and impractical. ## 3. Explanation of why the other options are incorrect: **A) may show the lights for a vessel not under command** * **Incorrect.** A vessel not under command (NUC, Rule 27) is one that, due to exceptional circumstance, is unable to maneuver as required by the rules. The vessel described is actively engaged in the operation of towing (propulsion and steering control are still exercised). Displaying NUC lights while performing a maneuverable operation like towing is misleading and dangerous. **C) must show a yellow light above the stern light** * **Incorrect.** This is the "towing light" (Rule 24(a)(iii)) and is generally required. However, the scenario specifically allows for the *impracticality* exemption (Option B). If it is impractical to comply with the whole set of towing lights (Rule 24), then the vessel "need not" comply with the lighting rules, which includes the towing light, although displaying it is strongly encouraged if possible. Since B establishes the legal allowance for non-compliance, C (which states "must show") is not universally true in this specific emergency context. **D) must show the lights for a vessel towing** * **Incorrect.** This statement represents the *general rule* (Rule 24), but it fails to account for the crucial exception provided for vessels not normally engaged in towing (Rule 24 exemption for impracticality). Because the vessel is not normally engaged in towing, Option B grants a permissible waiver, meaning it is not strictly true that it *must* show the full set of lights.