The white masthead light required for a power-driven vessel under the Rules is visible over how many degrees of the horizon?

The white masthead light required for a power-driven vessel is essential for safe navigation and visibility to other vessels. This light must be visible over an arc of the horizon measuring 225 degrees. The design of this requirement ensures that the light is seen from both the front and the sides of the vessel, enhancing the ability of other operators to judge the heading and type of the vessel they are seeing.

Specifically, the masthead light is typically installed at a higher point on the vessel, providing a clear line of sight for other boats. This extensive visibility range is crucial, particularly in conditions of reduced visibility, ensuring that all surrounding vessels can recognize the presence of the power-driven vessel and its direction of travel. Thus, the specification of 225 degrees ensures that safety protocols are maintained during nighttime and poor visibility conditions, promoting awareness and preventing potential collisions.