What is the visibility angle of an all-round light on a vessel?

The visibility angle of an all-round light on a vessel is 360 degrees. This means that the light is visible from every direction around the vessel, which is crucial for ensuring that the ship is seen by other vessels regardless of their positioning. All-round lights are typically used for certain types of vessels or in specific situations, such as at anchor or during certain operations, to enhance visibility and safety.

By having an all-round light visible from all angles, it provides a clear indication of the vessel's presence and helps in collision avoidance. This is particularly important in conditions of reduced visibility, such as fog or at night, where conventional navigation lights alone might not fully inform other vessels of a ship's position and orientation. In contrast, the other options indicate limited angles of visibility, which do not meet the requirement for an all-round light.