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Example of a typical gun port of a 36-pounder battery on a 19th-century ship. The lid is half open, and features an observation window and a ventilation opening, shown half-opened. It opens by pulling two chains that run from the top of the lid and through the hull, and closes by pulling chains running from below the lid and through the gun port.
The vessels were envisaged as having a multi-purpose covered deck with the ability to carry up to 10,000 tonnes of ship fuel, 1,300 tonnes of aviation fuel, 1,100 tonnes of ammunition as well as 1,000–1,500 lane metres of deck space for carrying vehicles and containerized cargo.
By the Athenian trireme era (500 BC), [1] the hull was strengthened by enclosing the bow behind the ram, forming a bulkhead compartment. Instead of using bulkheads to protect ships against rams, Greeks preferred to reinforce the hull with extra timber along the waterline, making larger ships almost resistant to ramming by smaller ones. [2]
The 746-foot-long, double-hull ships can carry 162,000 barrels of fuel, 6,675 tons of dry cargo, and 1,716 tons of refrigerated stores. A helicopter deck at the stern also enables VERTREP.
The hull classification symbols for these craft begin with (Y). Ship status is indicated as either currently active [A] (including ready reserve), inactive [I], or precommissioning [P]. Ships in the inactive category include only ships in the inactive reserve, ships which have been disposed from US service have no listed status.
Hull form lines, lengthwise and in cross-section. A hull is the watertight body of a ship, boat, submarine, or flying boat. The hull may open at the top (such as a dinghy), or it may be fully or partially covered with a deck. Atop the deck may be a deckhouse and other superstructures, such as a funnel, derrick, or mast.
Single hull, Double bottom, and Double hull ship cross sections. Green lines are watertight; black structure is not watertight. A double hull is a ship hull design and construction method where the bottom and sides of the ship have two complete layers of watertight hull surface: one outer layer forming the normal hull of the ship, and a second inner hull which is some distance inboard ...
Model of a French 74-gun ship from 1755 showing tumblehome as its hull narrows rising to the upper deck. Tumblehome is a term describing a hull which grows narrower above the waterline than its beam. The opposite of tumblehome is flare. A small amount of tumblehome is normal in many naval architecture designs in order to allow any small ...