What is the degree coverage of a masthead light?

The degree coverage of a masthead light is indeed 225 degrees. A masthead light is typically mounted high on the vessel and is designed to be visible from both the front and the sides of the vessel to help communicate its position to other vessels. The light covers the forward arc of the vessel, extending both to port and starboard, but it does not illuminate directly behind the vessel.

The 225 degrees are divided such that 112.5 degrees are visible to each side of the vessel's centerline, extending forward and encompassing a significant portion of the boat's forward visibility. This design is crucial for navigation safety, especially in conditions of low visibility, as it provides other vessels with information about the orientation and movement of the vessel.

In contrast, options referring to 180 degrees, 360 degrees, and 90 degrees do not accurately describe masthead light coverage, as those angles do not reflect the specific visibility requirements outlined in maritime navigation rules. A masthead light’s primary purpose is to indicate the presence of the vessel directionally to other vessels, which is effectively communicated within the 225-degree arc.