Vessels under oars need to display which kind of light to prevent collision?

Vessels under oars are required to display an electric torch or lighted lantern to prevent collisions, particularly during low visibility conditions such as at night or in poor weather. This requirement ensures that the vessel is visible to others navigating in the vicinity, which is crucial for maintaining safety on the water. The use of a torch or lantern provides a reliable and easily recognizable source of light, alerting other boaters to the presence of the oarsman.

While sidelights and colored lights are important for other types of vessels, they do not apply specifically to vessels under oars. A strobe light is typically associated with emergency signaling rather than routine navigation. Therefore, the most appropriate and effective means for an oarsman to signal their presence and prevent collisions is by using an electric torch or a lighted lantern.