You are under sail and overtaking a tug and tow. Which action is correct?

Answer: A — You must maneuver to avoid the tug and tow.

When you are under sail and overtaking a tug and tow, the appropriate action is to maneuver to avoid the tug and tow. This is in accordance with the International Regulations for Preventing Collisions at Sea (COLREGS), which emphasize the responsibility of the overtaking vessel to take action to avoid collisions. In this scenario, the tug and tow likely have limited maneuverability, which is a consideration in navigation rules. As the overtaking vessel, you are required to keep a safe distance and navigate in a manner that does not impede the safe operation of the tug and tow. By maneuvering to avoid them, you demonstrate adherence to the rules promoting safety at sea, reducing the risk of collision while respecting the operational constraints of the tug. The other actions listed are not suitable responses. Proceeding without concern would ignore the obligations of safe navigation, and sounding a warning signal does not address the need to actively avoid a potentially dangerous situation. Additionally, disengaging from the tow is not applicable in this context; if you are overtaking, you must focus on maintaining safe navigation around the tug and tow rather than reconsidering their engagement in towing.