Question 26 GLI07 - OUPV

The Correct Answer is D **Why option D is correct:** Option D is a direct citation of a special rule within the Inland Navigation Rules, specifically Rule 23(d)(i) concerning power-driven vessels when operating on the Great Lakes (Inland Only). This rule provides an exception to the standard lighting configuration for power-driven vessels when operating under 50 meters in length on the Great Lakes. It states that such a vessel may carry an **all-round white light** in lieu of the second masthead light and the stern light required by the standard Rule 23(a)(i) and (a)(ii). This simplified lighting arrangement is a valid alternative under the "INLAND ONLY" regulations specific to the Great Lakes. **Why the other options are incorrect:** * **A) Great Lakes vessels are exempted from the requirement to show yellow towing lights.** This is incorrect. Yellow towing lights (or stern lights) are required for towing vessels under the standard Inland Rules (Rule 24). The Inland Rules applicable to the Great Lakes do not provide a blanket exemption from showing the required yellow towing lights when engaged in towing operations. * **B) Sidelights for vessels over 50 meters are required to have only a two-mile range of visibility.** This is incorrect. According to Rule 22 (Visibility of Lights), for vessels 50 meters or more in length, the sidelights must have a minimum range of visibility of **3 miles**, not 2 miles. A 2-mile range is only permitted for vessels 12 meters or more but less than 50 meters. * **C) The showing of a forward masthead light is optional for vessels under 150 meters.** This is incorrect. The requirement to show a forward masthead light is mandatory for all power-driven vessels when underway (Rule 23(a)(i)), regardless of length, unless specifically utilizing a permitted exception (like the single all-round light exception for vessels under 12 meters, or the exception discussed in D for vessels under 50 meters on the Great Lakes). There is no provision making the forward masthead light optional for vessels under 150 meters.