fender (boat); bumper (dock/pier)
Nautical term for a protective cushion used to prevent damage when a vessel contacts a dock, pier, or another vessel. The cross-referenced term 防舷材 is a near-synonym.
See also: 防舷材
When the ship comes alongside the quay, they lower fenders to protect the hull.
At the port, fenders are placed between the vessel and the pier to absorb impact.