What lights should a power-driven vessel exhibit which is of less than 7m in length and whose speed does not exceed 7 knots?

A power-driven vessel that is less than 7 meters in length and whose speed does not exceed 7 knots is required to exhibit one all-round white light when underway. This is aligned with the International Regulations for Preventing Collisions at Sea (COLREGs), specifically under Rule 25, which outlines the lighting requirements for power-driven vessels.

The all-round white light serves to provide visibility of the vessel to others, ensuring that it can be seen from all directions at night or in low visibility conditions. This requirement is designed to enhance the safety of navigation, allowing other vessels to discern the position and direction of the smaller vessel.

For vessels of this size and speed, no additional lights are required beyond the all-round white light, due to their limited size and operational capabilities. Consequently, the other options, which include multiple lights or no lights at all, do not align with the COLREGs provisions for small power vessels, as they either overstate or incorrectly specify the light configuration needed.