Question 27 GLI04 - Mate of LT 500-1600 GRT

The Correct Answer is C ### Why Option C (sidelights and two towing lights) is correct: The question specifies a power-driven vessel that is either pushing ahead or towing alongside (i.e., operating as part of a composite unit or alongside a tow) specifically on the **Western Rivers** (above mile 106.1 on the Mississippi River). The rules governing navigation lights on the Western Rivers are found in **33 CFR Subchapter M** (Inland Navigation Rules), specifically addressing the requirements for push boats and towing vessels on these waters. According to 33 CFR 89.27(a), **Western Rivers Towing Lights**: > "A power-driven vessel when pushing ahead or towing alongside on the Western Rivers, except the portion of the Mississippi River below the Huey P. Long Bridge at mile 106.1, shall exhibit: > (1) The **sidelights**; and > (2) **Two towing lights** in a vertical line." Option C, "sidelights and two towing lights," perfectly matches this specific requirement for towing operations on the Western Rivers. ### Why the other options are incorrect: **A) one masthead light, sidelights, and stern light:** This configuration is generally used for a typical power-driven vessel under 50 meters in length that is proceeding normally (not towing). It does not meet the specific requirement for towing on the Western Rivers, which mandates two towing lights instead of a stern light and requires specific masthead lights only if the vessel is pushing ahead (and then usually two or three). **B) two masthead lights, sidelights, and stern light:** This configuration is often used for a power-driven vessel over 50 meters in length proceeding normally. It lacks the two towing lights required for Western River towing operations and includes a stern light, which is replaced by towing lights in this context. **D) two masthead lights, sidelights, and two towing lights:** While a vessel pushing ahead might exhibit masthead lights (either two or three, depending on the length of the tow, and located forward), the specific **Western Rivers Towing Lights** rule (33 CFR 89.27) *only* lists sidelights and two towing lights as mandatory for this operation on these specific waters. The inclusion of two masthead lights is not strictly mandated by the fundamental rule for Western Rivers pushing/towing alongside, making option C the most precise and definitive answer based on the mandatory light setup defined in the regulations. The regulation 33 CFR 89.27 specifically defines the Western Rivers towing configuration as only the sidelights and the two towing lights.