In a crossing situation, when is a stand-on vessel allowed to act?

The correct answer emphasizes that a stand-on vessel is allowed to take action when it becomes apparent that the give-way vessel is not taking appropriate action. The stand-on vessel, as defined by the Rules of the Road, generally has the right of way and is expected to maintain its course and speed. However, if the stand-on vessel observes that the give-way vessel is not behaving as expected — for example, if it is not changing course or speed to avoid a collision — the stand-on vessel has the responsibility to take safe action such as altering its course or speed to avoid a potential collision.

This rule is in place to ensure safety at sea, as the stand-on vessel cannot rely solely on the give-way vessel to perform its duties effectively. By taking action when necessary, the stand-on vessel can prevent dangerous situations and ensure safe passage, highlighting the importance of situational awareness in navigation.

The other options do not provide proper conditions for the stand-on vessel to act. Clear visibility or the presence of distress signals from the give-way vessel do not automatically warrant a departure from the stand-on stance. Feeling threatened is too subjective and does not conform to the objective rules governing navigational obligations. Thus, the correct response underscores the importance of proactive safety measures in a