33 C.F.R. § 6.01-4

Waterfront facility. “Waterfront facility,” as used in this part, means all piers, wharves, docks, or similar structures to which vessels may be secured and naval yards, stations, and installations, including ranges; areas of land, water, or land and water under and in immediate proximity to them; buildings on them or contiguous to them and equipment and materials on or in them.