Which set of vessels is described as turning off side, stern, and if required masthead lights when underway, not making way?

• A. Fishing; trawling; NUC; RAM
• B. Fishing; Trawling; RAM; Power driven
• C. Trawling; NUC; RAM; Sailing
• D. Fishing; NUC; RAM; Crossing

Answer: (A)

When a vessel is underway but not making way, the navigation-light requirements change for certain operations or statuses. Some vessels—like fishing vessels (including trawlers) and those that are Not Under Command or Restricted in Ability to Maneuver—are allowed to display only the lights necessary to indicate their status and avoid confusion or interference with their work. Because of the nature of their activity or their maneuvering limits, they may turn off the side and stern lights (and, if required, the masthead light) while still showing the lights that identify their situation. This is why the set that includes fishing, trawling, Not Under Command, and Restricted in Ability to Maneuver is described as turning off those running lights when underway but not making way. Other vessel types would normally show the standard running lights, so they don’t fit this description.