Question 27 GLI03 - Master-LT 500-1600 GRT

The Correct Answer is C ### Why Option C is Correct This question specifically addresses the lighting requirements for a power-driven vessel engaged in pushing ahead or towing alongside on the **Western Rivers** (specifically above mile 106.1 on the Mississippi River), which falls under the **Inland Rules** of navigation. The Inland Rules (33 CFR Part 89 – Inland Navigation Rules, specifically Rule 24: Towing and Pushing) have a special provision for vessels engaged in towing on the Western Rivers and certain other designated waters: 1. **Sidelights:** Required for visibility to prevent collision from the side. 2. **Towing Lights:** Vessels pushing ahead or towing alongside on the Western Rivers are required to show **two towing lights** in a vertical line (replacing the usual stern light). This configuration is mandated by the special annexes governing lighting on these specific inland waterways. Therefore, the required configuration is **sidelights and two towing lights**. ### Why Other Options Are Incorrect **A) one masthead light, sidelights, and stern light** * **Incorrect:** This configuration describes a standard power-driven vessel of less than 50 meters in length (not towing) or, incorrectly, a vessel towing by hawser (which requires masthead lights). Crucially, it uses a single stern light instead of the required two towing lights for pushing/towing alongside on the Western Rivers. **B) two masthead lights, sidelights, and stern light** * **Incorrect:** This configuration describes a standard power-driven vessel of 50 meters or more in length (not towing). It lacks the special towing lights and incorrectly includes standard masthead lights (which are generally superseded by a different masthead light requirement or omitted for certain Western River towing configurations, depending on the specifics of the tow, but are definitively incorrect paired with a single stern light). **D) two masthead lights, sidelights, and two towing lights** * **Incorrect:** While this option includes the required sidelights and two towing lights, the presence of **two standard masthead lights** is incorrect for this specific operation (pushing ahead/towing alongside) on the Western Rivers. Vessels pushing ahead on the Western Rivers typically display the required masthead lights (which may be two, depending on length, but positioned differently or designated specifically for towing) and sidelights forward, but the standard requirements are often met by displaying the two towing lights aft combined with specific masthead light/range light placements not accurately described by this option in the context of Western River pushing operations. The defining characteristic for the stern visibility requirement on the Western Rivers for pushing is the use of **two towing lights** along with sidelights, making C the most precise and minimal correct requirement for visibility from the side and stern.