Which action is NOT required of a sailing vessel when encountering a power-driven vessel?

A sailing vessel is generally required to adhere to certain navigational rules when encountering a power-driven vessel. In this context, altering course in confusion is not a mandated action. Instead, it is essential for a sailing vessel to maintain a steady course and only alter its direction when it clearly contributes to safe navigation and avoiding a collision.

Sailing vessels are often regarded as having the right of way when under sail, meaning they should take measures to ensure they do not interfere with the navigation of power-driven vessels, which must provide the appropriate action to avoid collisions. Keeping course, signaling as necessary (which can include warning signals), and maintaining their navigational rights are critical responsibilities.

In confusion, however, simply altering course without a clear understanding of the situation can lead to more danger and uncertainty, making it an action that is not required and potentially reckless. It is vital that any changes in navigation are made judiciously and only when they enhance safety.