Under both International and Inland rules, working lights shall be used to illuminate the decks of a vessel. When is this required?

Under both International and Inland rules, working lights shall be used to illuminate the decks of a vessel. When is this required?

• A. Over 100 meters at anchor
• B. When the vessel is underway in daylight
• C. Only in restricted visibility at sea
• D. Never

Answer: (A)

Deck working lights are there to safely illuminate the deck and make a vessel’s presence obvious to others, especially when people are moving about on deck at night. The rule applying to both International and Inland conventions requires that vessels 100 meters or longer use these lights when they are at anchor. This is to reduce the risk of accidents and improve visibility around a large, stationary ship. It does not apply just because a vessel is underway, nor is it a blanket requirement for all situations; the threshold is tied to the vessel’s length and the condition of being at anchor.

Deck working lights are there to safely illuminate the deck and make a vessel’s presence obvious to others, especially when people are moving about on deck at night. The rule applying to both International and Inland conventions requires that vessels 100 meters or longer use these lights when they are at anchor. This is to reduce the risk of accidents and improve visibility around a large, stationary ship. It does not apply just because a vessel is underway, nor is it a blanket requirement for all situations; the threshold is tied to the vessel’s length and the condition of being at anchor.