What action should a stand-on vessel take to avoid a collision?

The correct action for a stand-on vessel to take in order to avoid a collision is to maintain its current course and speed. In a situation where vessels are on a collision course, the stand-on vessel is the one that has the right of way and is expected to keep its course and speed unless it becomes apparent that a collision cannot be avoided.

Maintaining a steady course allows other vessels, particularly the give-way vessel, to determine the stand-on vessel's position, speed, and trajectory. This predictability is crucial for safe navigation and helps reduce confusion during high-stress situations, allowing the give-way vessel to take the necessary actions to avoid contact.

Turning towards the port side or starboard side as options are reactive movements that may lead to unpredictable maneuvers, complicating the situation rather than clarifying intentions. Increasing speed can also create dangerous scenarios during avoidance, as it could lead to miscalculations in time or distance, increasing the risk of collision rather than reducing it. Therefore, maintaining course and speed is the best practice for a stand-on vessel.