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On a ship, the function of a porthole, when open, is to permit light and fresh air to enter the dark and often damp below-deck quarters of the vessel. It also affords below-deck occupants a limited view to the outside world. [2] When closed, the porthole provides a strong water-tight, weather-tight and sometimes light-tight barrier.
A closed weathertight door can seal out spray and periodic minor flow over weather decks, but may leak during immersion. These outward opening doors are useful at weather deck entrances to compartments above the main deck. [11] Joiner doors are similar to doors used in conventional buildings ashore. They afford privacy and temperature control ...
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 ...
Aweather: toward the weather or windward side of a ship. [10] Aweigh: just clear of the sea floor, as with an anchor. [11] Below: a lower deck of the ship. [1] Belowdecks: inside or into a ship, or down to a lower deck. [12] Bilge: the underwater part of a ship between the flat of the bottom and the vertical topsides [13] Bottom: the lowest ...
AAW An acronym for anti-aircraft warfare. aback (of a sail) Filled by the wind on the opposite side to the one normally used to move the vessel forward.On a square-rigged ship, any of the square sails can be braced round to be aback, the purpose of which may be to reduce speed (such as when a ship-of-the-line is keeping station with others), to heave to, or to assist moving the ship's head ...
The water-tight doors were immediately closed, and all hands were summoned to save ship. The sailors worked calmly and without confusion. As she was bumping heavily on the reef steam was got up, when suddenly the sternpost was smashed, and the screw propeller dropped into the sea.
A landing craft in the flooded well deck of USS Comstock. The structure on the modern naval amphibious ships does not exactly fit the traditional "well deck" definition of a weather, or open deck, that is lower than adjacent decks, surrounded by bulkheads that would, lacking proper drainage, form a catchment for water; however, the structure has its origins in such an exaggerated deep deck on ...
Weather elements such as sea state, surface winds, tide levels, and sea surface temperature are tackled by organizations tasked with forecasting weather over open oceans and seas. Currently, the Japan Meteorological Agency , the United States National Weather Service , and the United Kingdom Met Office create marine weather forecasts for the ...
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