Which area of a self-propelled vessel with a capacity of 250 barrels and up should be illuminated between sunset and sunrise?

The correct answer is the transfer operations work area and connection points because it is critical to ensure safety during the transfer of oil or hazardous materials, particularly during nighttime or low-light conditions. Proper illumination in this area helps in maintaining clear visibility, thereby reducing the risks of spills or accidents that may arise during loading or unloading operations.

Lighting is essential to check connections and ensure that transfer hoses or pipelines are properly secured, thus preventing leaks. This regulation is especially important for vessels that transport potentially hazardous cargo, as it promotes safe practices and compliance with environmental regulations.

In contrast, while the navigation bridge, engine room, and deckhouse are important areas of a vessel, they may not require the same level of lighting focus during transfer operations as the specific area designated for transferring cargo. The prevention of spills and accidents during transfer operations is prioritized through effective illumination in that particular area.