If a vessel is not under command, what should other vessels do?

• A. Keep well clear and take early action to avoid collision.
• B. Maintain speed to pass quickly.
• C. Attempt to assist the not-under-command vessel to sail.
• D. The not-under-command vessel has priority and others must slow down.

Answer: (A)

Not under command describes a vessel that, due to some exceptional circumstance, cannot maneuver as required by the rules. Because it cannot control its movements, other vessels must take action to avoid collision. The best course is to keep well clear of the not-under-command vessel and begin evasive action early if there is any risk of crossing or close approach. This often means reducing speed and/or altering course to pass at a safe distance on either side, giving the vessel ample room to maneuver if it regains control. There is no obligation to assist or to wait for the not-under-command vessel to move; the priority for others is safe passage and avoiding collision.