A vessel displaying one green light at night indicates what type of vessel?

A vessel displaying one green light at night indicates that it is a sailing vessel underway. In maritime navigation, the lights used by vessels serve specific functions and convey important information about their status and activities. A green light is displayed on the starboard (right) side of a vessel, which offers a visual indication to other vessels about the direction it is traveling.

When observing a green light alone, it indicates that the vessel is actively moving through the water, which aligns with the characteristics of a sailboat under sail. This is an important visual cue for other boaters to ascertain their safe passage and to avoid potential collisions at night when visibility might be limited.

Understanding the significance of the navigation lights is crucial for safe boating practices, as it enables operators to make informed decisions about navigation and adherence to maritime rules.