Question 26 ONC07 - OUPV-Near Coastal

The Correct Answer is D **Why Option D is Correct:** Option D states: "An all-round white light may be carried in lieu of the second masthead light and stern light." This statement is correct and is specifically allowed under Annex V, Rule 3(b) of the Inland Navigation Rules, which pertains to the lighting requirements for Great Lakes vessels. This rule provides a specific exemption for power-driven vessels operating on the Great Lakes, allowing them to simplify their lighting configuration. If a vessel is under $65.5$ meters (215 feet) in length, it may display one all-round white light in place of the second masthead light (after masthead light) and the stern light, provided that the all-round white light is located in the after half of the vessel and is visible $360$ degrees. **Why Options A, B, and C are Incorrect:** * **A) Great Lakes vessels are exempted from the requirement to show yellow towing lights.** * This is incorrect. When a power-driven vessel is towing, it is required to show two or three vertical masthead lights (depending on the length of the tow) and one or two yellow towing lights (placed above the stern light). Great Lakes vessels follow the general Inland Rule for towing lights, and are *not* exempted from the requirement to show yellow towing lights when applicable. * **B) Sidelights for vessels over 50 meters are required to have only a two-mile range of visibility.** * This is incorrect. According to Annex I, the required minimum range of visibility for sidelights on vessels $50$ meters or more in length is **3 nautical miles**, not 2 miles. The 2-mile range applies to vessels 20 meters or more, but less than 50 meters in length. * **C) The showing of a forward masthead light is optional for vessels under 150 meters.** * This is incorrect. The forward masthead light is a mandatory light for all power-driven vessels underway, regardless of length, unless specifically exempted (e.g., small boats under 12 meters may use an all-round white light). A vessel under 150 meters (which is over 50 meters) must show a forward masthead light. The length of 150 meters does not make the forward light optional.