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56:, which have two hull layers only in the bottom of the ship but not the sides. In low-energy collisions, double hulls can prevent flooding beyond the penetrated compartment. In high-energy collisions, however, the distance to the inner hull is not sufficient and the inner compartment is penetrated as well.
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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, typically by a few feet, which forms a redundant barrier to seawater
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Double hulls are significantly safer than double bottoms, which in turn are safer than single bottoms. In case of grounding or other underwater damage, most of the time the damage is limited to flooding the bottom compartment, and the main occupied areas of the ship remain intact.
174:, the double hull structure is significantly different, consisting of an outer light hull and inner pressure hull, with the outer hull intended more to provide a hydrodynamic shape for the submarine than the cylindrical inner pressure hull. It was introduced in the late 1890s by
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In low-energy collisions to the sides of the vessel, double hulls also prevent flooding beyond the penetrated compartment. In high-energy collisions, however, the distance to the inner hull is not sufficient and the inner compartment is penetrated as well.
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or MARPOL Convention. A double hull does not protect against major, high-energy collisions or groundings which cause the majority of oil pollution, despite this being the reason that the double hull was mandated by United States legislation. After the
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245:"Chapter II-1: Construction - Structure, subdivision and stability, machinery and electrical installations, Regulation 12: Double bottoms in passenger ships"
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structure with the two hull plating layers as upper and lower plates for a composite beam. This greatly strengthens the hull in
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Single hull, Double bottom, and Double hull ship cross sections. Green lines are watertight; black structure is not watertight
190:, which are designed specifically to absorb sound rather than reflect it, helping to hide the vessel from sonar detection.
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Double hulls or double bottoms have been required in all passenger ships for decades as part of the
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This article is about ships with two hull layers. For ships with two parallel hulls, see
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be used as inboard tanks to carry oil, ballast water or fresh water (ventilated by a
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The space between the two hulls is sometimes used for storage of ballast water.
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254:, International Maritime Organization (IMO), 2004 , p. 51, archived from
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led to double hulls being standardized for other types of ships including
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help prevent pollution in case of liquid cargo (like oil in tankers)
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International
Convention for the Prevention of Pollution from Ships
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A double bottom or hull also conveniently forms a stiff and strong
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252:
International
Convention for the Safety of Life at Sea (SOLAS)
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284:
The
Tankship Tromedy, The Impending Disasters in Tankers
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Double hulls are a more extensive safety measure than
186:), this outer skin serves as a mounting point for
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46:in case the outer hull is damaged and leaks.
130:Double hulls' ability to prevent or reduce
115:act as a platform for machinery and cargo.
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16:Ship hull design and construction method
112:help to maintain stability of ship; and
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150:disaster, when that ship grounded on
89:secondary hull bending and strength
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93:primary hull bending and strength
286:, CTX Press, Tavernier, Florida
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180:French submarine Narval
98:Double hulls can also:
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317:Watercraft components
63:or SOLAS Convention.
61:Safety Of Life At Sea
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154:outside the port of
126:Double-hulled tanker
200:Coulombi Egg Tanker
184:hydrodynamic bypass
205:Naval architecture
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136:oil tankers
120:Oil tankers
36:double hull
306:Categories
231:References
166:Submarines
152:Bligh Reef
132:oil spills
220:Multihull
215:Submarine
148:oil spill
104:gooseneck
21:multihull
282:(2006):
210:Bulkhead
194:See also
265:17 July
138:by the
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160:Alaska
156:Valdez
81:girder
259:(PDF)
248:(PDF)
38:is a
290:ISBN
267:2012
85:beam
67:Uses
43:hull
40:ship
178:on
170:In
83:or
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34:A
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