Unsinkability

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Unsinkability

 

of a vessel, the ability of a vessel to remain afloat and not capsize when its hull is damaged and one or more compartments are flooded; the most important element in the survivability of a vessel.

In practice, the unsinkability of a vessel is its ability to meet the standards for buoyancy and stability set forth by a classification society for the given type of damage. The most rigorous requirements apply with regard to the unsinkability of passenger vessels. The unsinkability of a vessel is enhanced by the internal division of the hull into watertight compartments both vertically (by decks) and horizontally (by partitions); other measures include connecting compartments located on opposite sides of the ship and constructing a double bottom. A damaged vessel can be kept afloat if vessel list and trim are prevented by flooding compartments that are symmetric to the damaged compartments and if stability is restored by the intake of ballast in the lower compartments.

The concept of unsinkability was first introduced by the Russian scientist and naval commander Admiral S. O. Makarov. The theory of unsinkability was formulated by Academician A. N. Krylov and supplemented and developed by I. G. Bubnov, R. A. Matrosov, and V. G. Vlasov, among others.

E. G. LOGVINOVICH

References in periodicals archive ?
Bookmakers remained largely unmoved with Coral and Ladbrokes leaving Unsinkable Boxer's Gold Cup price unchanged at 12-1.
CORAL CUP BETTING: Coral: 10-1 Unsinkable Boxer, 14-1 Blowing Wind, Moorish, Sprung Rhythm, Top Cees, Whip Hand, 16-1 Big Strand, Buckhouse Boy, Commanche Court, Lets Be Frank, Melody Maid, Nocksky, Royale Angela, Tamarindo, 20-1 bar.
Coral betting: 10-1 Unsinkable Boxer, 14-1 Blowing Wind, Moorish Sprung Rhythm Top Cees Whip Hand, 16-1 bar.
Andrew Thornton will ride Lance Armstrong and Dean Gallagher will be on Unsinkable Boxer.
The ease of Unsinkable Boxer's win angered rival trainers who, before the race, felt the Martin Pipe- trained gelding had been let into the race lightly.
The 46,328-ton ship, described as unsinkable, was built at Harland & Wolff in Belfast.
The event was notable for the first-fence fall of Unsinkable Boxer, and the appearance of 1998 Whitbread Gold Cup winner Call It A Day, who finished third
OLD favourites Unsinkable Boxer and Senor El Betrutti are set to run in point-to-points this weekend.
Meanwhile, Jersey-based owner Paul Green has decided to switch Unsinkable Boxer from French trainer Francois Doumen to Robert Alner in Dorset.
Builder of quality, unsinkable, affordable inshore fishing boats and skiffs 12-17 ft.
Unsinkable Girl has the early pace to be in third place on the second bend and within sight of the leaders.
Miss Allurity took a flier from trap four and raced to the bend ahead of Unsinkable Girl and Survive In Style.