What does the steaming light signify on a vessel?

The steaming light is a white light that is required to be displayed on power-driven vessels when they are under way and not at anchor, particularly when they are engaged in fishing or operating in a way that requires maneuverability. This light is mounted higher than the side lights and is positioned at the centerline of the vessel to give a clear indication of its direction of travel, thereby enhancing its visibility to other vessels.

This is crucial for ensuring safety on the water, as it helps other mariners to recognize that the vessel is actively moving. The correct interpretation of the steaming light reinforces the importance of collision avoidance, aiding in navigation by clearly indicating the presence of an underway vessel.

The other options do not accurately describe the steaming light function or characteristics. The red light indicates port (left) side navigation, the green light indicates starboard (right) side navigation, and a yellow light is typically used for warning or signal purposes but does not denote the operation status of a vessel like the steaming light does.