How should a captain act if someone falls overboard?

When someone falls overboard, the appropriate and safest action for a captain is to stop the boat and throw a life preserver. This response ensures that the person in the water has a flotation device to hold onto, which can prevent drowning and provide critical support until they can be rescued. Stopping the boat allows for a proper assessment of the situation, and it minimizes the risk of further accidents, such as running over the person who has fallen overboard.

The effectiveness of a life preserver is especially significant because it helps to keep the individual afloat while they await assistance. This method prioritizes the safety of the person in the water and maximizes the chances of a quick and safe recovery. It's crucial for the captain and crew to remain calm, communicate clearly, and follow safety protocols during such emergencies to ensure the best outcome.