When two power-driven vessels are approaching head-on, what should they do?

When two power-driven vessels are approaching each other head-on, they should take action to prevent a collision by following the rule of turning to starboard. By doing so, both vessels will create a safe passage between them as they each maneuver to their right. This is a commonly accepted practice in navigational rules, known as the "rule of the road," which aims to ensure safety on the water by having predictable and consistent responses to such situations.

Turning to starboard allows each vessel to pass to the port side of the other. This action reduces the risk of collision and allows for a clear and safe passage for both vessels. It reflects an understanding of maritime navigation conventions, which emphasize the importance of predictable maneuvers to enhance safety at sea.

The other choices present various actions that do not align with established maritime navigation rules or could create confusion or danger. Speeding up might increase the risk of collision rather than preventing it, while maintaining current courses could lead to a direct collision. Lastly, having one vessel turn left while the other turns right lacks the clarity and predictability needed in such situations, potentially complicating the paths of both vessels instead of resolving the encounter safely.