(a) Apron — The area along the waterfront edge of the pier or wharf.

(b) Bulwark — The side of a ship above the upper deck.

(c) Coaming — The raised frame, as around a hatchway in the deck, to keep out water.

(d) Jacob's ladder — A marine ladder of rope or chain with wooden or metal rungs.

(e) Rail, for the purpose of §1926.605, means a light structure serving as a guard at the outer edge of a ship's deck.