You see ONLY the light shown in illustration D080RR below. Which vessel are you observing?

The correct identification of the vessel based on the light shown in illustration D080RR is a vessel under oars. When a vessel is using oars for propulsion, it is required to display a certain configuration of lights. Specifically, a vessel under oars is typically represented by a single white light that can be seen from all directions, indicating its status.

This configuration contrasts with the lights displayed by other types of vessels. For instance, a vessel at anchor would show an all-round white light at the stern and an all-round white light at the bow. A vessel underway, which is powered and not anchored, would typically display sidelights and a stern light. A vessel aground often carries similar lights to a vessel at anchor, but might also include additional lights to indicate its status.

Recognizing the specific light pattern helps mariners determine the type of vessel they are encountering, which is crucial for safe navigation and adherence to maritime rules. Understanding these lighting requirements reinforces the need for vigilance and proper observation while on the water.