A kedge is a lightweight, secondary anchor used for maneuvering or warping a vessel, while "kedging" is the process of using it to move a boat or pull it off a grounding. It involves carrying the anchor out via dinghy to haul the boat toward it, often used to navigate tight spots or escape shallow water.

Key Aspects of Kedge Sailing:
The Anchor: A kedge anchor is traditionally smaller and lighter than the primary "bower" anchor, allowing it to be easily transported by a tender or dinghy.

Kedging (Maneuver): To move a boat into deeper water after running aground, sailors take the kedge anchor in a dinghy, drop it in deep water, and use winches to haul the vessel off.

Warping (Repositioning): The technique is used to shift a boat's position, such as turning the vessel in a narrow harbor or moving in calm conditions where there is no wind.

Alternative Uses: It can be used to hold a boat's stern toward a beach (stern anchoring) or in conjunction with a halyard to heel a boat and reduce its draft to float off a shallow bank.