A graving dock is a large structure used for the maintenance and repair of ships. It resembles a dry dock, but with an added feature: a submerged entrance gate that can be closed to allow water to be pumped out, creating a dry working environment. This enables shipbuilders and technicians to access the hull of a vessel for cleaning, painting, and repairing purposes. The symbol "馃殺鉀达笍馃敡" represents the combination of a ship, a boat, and a wrench, signifying the essential tools and equipment used in the graving dock for ship maintenance and repair.