What must a stand-on vessel do unless it is clear that the give-way vessel is not taking appropriate action?

A stand-on vessel is defined as the vessel that has the right of way in a crossing situation or when two vessels are approaching close to one another. In this context, the stand-on vessel is expected to maintain its course and speed under normal navigation rules to avoid confusion and ensure safety. By doing so, it signals its intentions to the give-way vessel, which is responsible for avoiding a collision.

If the stand-on vessel were to change course immediately, slow down, or stop completely without clear indications that the give-way vessel is not taking appropriate action, it might lead to uncertainty that could increase the risk of collision. Maintaining course and speed helps both vessels clearly understand their positions and intentions, allowing the give-way vessel to take the necessary actions to avoid a potential collision. This principle is critical in ensuring safe navigation and minimizing the chances of accidents on the water.