What action should an operator take if they see a swimmer in the water?

When an operator sees a swimmer in the water, the most responsible action is to reduce speed and maintain a safe distance. This approach prioritizes the safety of both the swimmer and those on the vessel. Reducing speed minimizes the risk of creating a dangerous wake that could jeopardize the swimmer's safety or worsen their situation. Maintaining a safe distance ensures that the vessel does not accidentally come too close to the swimmer, which could lead to potential accidents, such as a propeller strike or capsizing waves from the boat’s movement.

Choosing to speed past quickly would pose immediate danger, as it can create turbulence and unpredictable waves that may endanger the swimmer. Stopping the vessel could also lead to risks if the boat is in a busy waterway, where other vessels may not be aware of the stopped boat. Calling for assistance may be necessary in certain scenarios, especially if the swimmer is in distress, but it should not replace the immediate responsibility to ensure the swimmer's safety by reducing speed and keeping a safe distance. Thus, the best course of action balances immediate safety concerns with situational awareness on the water.