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The stuffing box prevents water from entering the boat's hull. In many small fiberglass boats, for example, the stuffing box is mounted inboard near the point the shaft exits the hull . The "box" is a cylindrical assembly, typically of bronze, comprising a sleeve threaded on one end to accept adjusting and locking nuts.
The most common watertight subdivision is accomplished with transverse bulkheads dividing the elongated hull into a number of watertight floodable lengths. Early watertight subdivision tested with hoses sometimes failed to withstand the hydrostatic pressure of an adjoining flooded compartment. Effective watertight subdivision requires these ...
Compartmentalisation of a ship, to reduce floodability Parts of a water-tight compartment. Floodability is the susceptibility of a ship's construction to flooding.It also refers to the ability to intentionally flood certain areas of the hull for damage control purposes, or to increase stability, which is particularly important in combat vessels, which often face the possibility of serious hull ...
The flotation boxes came in two types: a rectangular basic unit measuring 5 ft × 5 ft × 7 ft (1.5 m × 1.5 m × 2.1 m). [1] The majority of NLPs were constructed using these. The second type had one side that was curved or angled to make a bow on the front of NLP barges or a ramp as needed.
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. The line where the hull meets the water surface is called the waterline.
Kelson marked with 17. The keelson or kelson is a reinforcing structural member on top of the keel in the hull of a vessel. [1] Originally used on wooden ships, in modern usage a kellson is any structural member used to strengthen the hull or support any heavy weight.
A sneakbox is a small boat that can be sailed, rowed, poled or sculled. It is predominantly associated with the Barnegat Bay in New Jersey, just as the canoe-like Delaware Ducker is associated with the New Jersey marshes along the Delaware River near Philadelphia. Railbird skiffs and garvey-like sneakboxes are other American hunting-boat types ...
The bottom is flat in a river junk with no keel (similar to a sampan), so that the boat relies on a daggerboard, [16] leeboard or very large rudder to prevent the boat from slipping sideways in the water. [17] The internal bulkheads are characteristic of junks, providing interior compartments and strengthening the ship.
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