Question 27 MODU01 - Offshore Installation Manager

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 (which are handled identically for lighting purposes) operating **INLAND ONLY** on the Western Rivers (specifically referencing the area above the Huey P. Long Bridge, which is governed by the Inland Rules). Under the Inland Navigation Rules, specifically **Rule 24(a)(iii)** regarding towing and pushing operations on the Western Rivers and certain specified waters (like the Mississippi River above the Huey P. Long Bridge): 1. **Vessels pushing ahead or towing alongside** must exhibit **sidelights** (Rule 24(a)(i)). 2. Instead of the typical single towing light required elsewhere, vessels engaged in towing or pushing operations on these specified inland waters must exhibit **two towing lights** in a vertical line at the stern (Rule 24(a)(iii)). 3. They are specifically **not** required to show masthead lights or stern lights (as the two towing lights substitute for the stern light). Therefore, the correct configuration is **sidelights and two towing lights**. ### Why the other options are incorrect: * **A) one masthead light, sidelights, and stern light:** This configuration describes a standard power-driven vessel, not one engaged in towing/pushing. It also fails to account for the unique requirement of two towing lights on the Western Rivers. * **B) two masthead lights, sidelights, and stern light:** This configuration is typically used for a towing vessel (not on the Western Rivers) where the length of the tow exceeds 200 meters, or for certain vessels over 50 meters in length. It still incorrectly substitutes a stern light for the required two towing lights on the Western Rivers and incorrectly includes masthead lights (which are not required for this operation on these specific waters). * **D) two masthead lights, sidelights, and two towing lights:** While it correctly includes sidelights and the two towing lights required for Western Rivers operations, it incorrectly includes masthead lights. Inland Rule 24(a)(iii) explicitly exempts these vessels from showing masthead lights when pushing ahead or towing alongside on the Western Rivers.