Which vessel may exhibit identifying lights when not engaged in her occupation?

Which vessel may exhibit identifying lights when not engaged in her occupation?

• A. None of the above
• B. A tug
• C. A fishing vessel
• D. A trawler

Answer: (A)

Identifying lights are used to signal a vessel’s current occupation to others, and they’re shown only while the vessel is actively engaged in that occupation. If a vessel is not performing that activity, it switches back to the standard navigation lights and does not display the occupation-specific identifying lights. So none of the listed vessels would be displaying those occupation-identifying lights when they’re not engaged in that work. They would use the normal navigation lights instead, and only switch to the occupation-specific lights if they are actively fishing, towing, etc.

Identifying lights are used to signal a vessel’s current occupation to others, and they’re shown only while the vessel is actively engaged in that occupation. If a vessel is not performing that activity, it switches back to the standard navigation lights and does not display the occupation-specific identifying lights.

So none of the listed vessels would be displaying those occupation-identifying lights when they’re not engaged in that work. They would use the normal navigation lights instead, and only switch to the occupation-specific lights if they are actively fishing, towing, etc.