Which tool is used on a vessel to assist someone out of the water?

A Jacobs ladder is a type of ladder that is often used on boats to assist individuals in getting out of the water. It typically consists of a vertical series of rungs or steps attached to the side of the vessel, allowing persons in the water to climb back aboard more easily, especially in emergency situations. The design of a Jacobs ladder allows for easier access from the water, as it typically has wide rungs and may be designed to be deployed and retrieved quickly.

In contrast, chafing gear is used to protect lines from wear while rubbing against surfaces, whipping is a method used to prevent the ends of ropes from fraying, and a bollard is a sturdy post on a dock for securing vessels. None of these options are intended for aiding someone out of the water, making the Jacobs ladder the only suitable choice for this purpose.