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| | Submarine - The real meaning from Timesharetalk wikipedia (Site not responding. Last check: 2007-11-03) |
 | | All surface ships, as well as surfaced submarines, are in positively buoyant condition, weighing less than the water they displace. |
 | | For general submersion or surfacing, submarines use the forward and aft tanks, called Main Ballast Tanks or MBTs, which are opened and completely filled with water to submerge, or filled by pressurized air to surface. |
 | | Such surfacing is very quick, so the sub may even partially jump out of the water, but it inflicts serious damage on some submarine systems, primarily pipes. |
| www.timesharetalk.co.uk /information.asp?k=Submarine (8410 words) |
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