Connecticut Safe Boating Practice Test

When can a power-driven vessel use its all-round white light?

1. At all times

2. While at anchor

3. When under engine power only

4. Only when combined with sidelights

The correct answer is: When under engine power only

The all-round white light is a navigational light that serves specific purposes under the regulations governing vessels. It is utilized primarily to indicate the presence of a power-driven vessel when it is under engine power. This light helps other vessels and operators in the vicinity to identify the type of vessel and its status, particularly in situations where other visibility might be limited. When a power-driven vessel is actively moving, displaying the all-round white light is crucial for ensuring safety and preventing collisions. This light signals that the vessel is operational and alerts other nearby vessels to its movement. Using the all-round white light while at anchor or when combined with sidelights is not accurate; it specifically pertains to when the vessel is using its engine. Therefore, this makes the statement regarding the usage of the all-round white light limited to engine power correct within the context of safe boating practices.