What is the purpose of a lifebuoy with a line?

• A. To act as a decorative buoy.
• B. To float for lifeboat docking.
• C. To measure ship speed.
• D. To assist a person in the water and pull them toward the vessel.

Answer: (D)

The main idea is that a lifebuoy with a line is a rescue tool: it provides buoyancy to keep a person afloat and includes a line so the rescuer can throw it to someone in the water and then pull them safely toward the vessel. The buoyant ring keeps the person's head above water, while the line allows you to reel them in and control the retrieval from a safe distance, reducing the risk of both the rescuer and the survivor being overwhelmed by waves or entangled. This setup is specifically for saving someone in the water, not for decoration, docking, or measuring speed.