A permanent covering over a compartment, hull or any part thereof. The platforms supported on the beams of ships. The old three deckers had upper deck, main deck, middle deck, lower deck, and orlop deck, no guns being carried on the latter. Below the orlop deck were the hold platforms, or decks. Yachts usually are said to have only one deck, i.e. the upper deck open to the sky; some large yachts, however, have a lower deck, laid and caulked. Smaller yachts have platform beams upon which the platform rests. The platform is the cabin floor or sole. The platforms supported on the beams of ships. The old three deckers had upper deck, main deck, middle deck, lower deck, and orlop deck, no guns being carried on the latter. Below the orlop deck were the hold platforms, or decks. Yachts usually are said to have only one deck, i.e. the upper deck open to the sky; some large yachts, however, have a lower deck, laid and caulked. Smaller yachts have platform beams upon which the platform rests. The platform is the cabin floor or sole.