Final answer:
When approaching a mooring buoy, one should maintain a safe speed and distance to avoid collisions, following proper navigation rules and safety procedures.
Step-by-step explanation:
When approaching a mooring buoy, the proper action to take is to maintain a safe speed and distance. This ensures that you have enough time to maneuver and avoid any potential collisions. It's important not to ignore the buoy and continue at the same speed, speed up, or stop the vessel immediately, as these actions can be unsafe.
The question can be related to understanding motion in a physics context, but since it deals with navigation rules and safety on water, it falls under the Social Studies category, specifically boater's education or maritime safety.
Example: If a ship is moving forward at a constant velocity and approaches a mooring buoy, it should decelerate in a controlled manner. According to the given scenarios, the ship should follow the solution described in option (d), which indicates it should decelerate at a constant rate and continue to slow down until it safely reaches the mooring buoy.