Submarines

Generally speaking, yes, as there may be conflilcts with diaplanes and ballast-tank venting, it might be located differently than on a surface shipl. most modern submarines, with the exception of small spy and oceanographic subs like the Alvin and upcoming Nedra, have anchors. These boats either operate over limited areas and times, or are always accompanied by a surface ship submarine tender.

Most people would use the abbreviation 'sub.' The US Navy uses the prefix SS to indicate a submarine. If it is SSN, it would indicate a Nuclear Powered submarine and SSBN would be a ballistic missile nuclear powered sub.

At times it sure seemed like a lot more than there actually were, but counting U.S. NATO, and Soviet submarines, around 300. That includes both attack and missile submarines, DE and Nuclear.

Roughly 2,000 merchant ships in WWII.

The pressure gets too great and the submarine implodes. The deeper you go under water the more pressure there is.

One is a machine; one is a mammal?

sonar

hydrophones

US submarines launched weapons during the Iraqi war. In warfare against enemy ships, the British submarine Conqueror torpedoed and sank the Argentine cruiser General Belgrano in the Falklands War in 1982. Rather than hunt for the Conqueror, two Argentine destroyers rescued survivors from the General Belgrano. The Brits had two other subs in the war zone, but they missed a chance at the Argentine carrier Vienticinco de Mayo which (with her destroyers) turned back upon hearing that their cruiser had been sunk, and a sea battle between the two navies was thus avoided.

1. Civilian-underwater research 2. Military-even though there's no hi-tech enemy left to fight (cold war's over); they're still available, just in case...

Water enters the submarine by letting water out not into its ballast tanks it enters from the flagura to the magura.

There is no specific cost - it varies with each officer, since any officer can choose a Nuclear Engineering/Training career path at any point in his career. Training costs include the officer's pay, benefits, etc., so it's different for everyone.

submarine.

Now modern day submarines are more improved and better built with better technology that we have these days.

Absolutely; it makes no difference whether or not a boat is submerged or not, as the torpedoes are water-impulse ejected out of the torpedo tube before engine start, and the tubes are literally about 20' below the waterline of a boat you see surfaced. Fully 3'4 of any surfaced boat is below the waterline that you don't see.

Density = mass / volume. If the mass decreases, the density decreases.

Because the animals were made to live in these conditions, whereas a steel submarine is a man-made object and not designed to live in these extreme depths. More Crabs and other deep-sea creatures have no air spaces in their bodies. What causes a submarine to implode at great depth is the difference in pressure on the inside and outside of the structure. Even a typical ocean fish (not a man-made object) would die at great depth because its swim bladder would be compressed. A creature with no air spaces in its body has incompressible water inside, and so it is not compressed by the pressure of the deep sea. Note that scuba equipment allows the pressure inside a diver's lungs to equal that of the water outside, but this has its limits: * At great pressure, a mammal's blood (including that of a human) absorbs far more gas than it does at sea level, and the gases we normally breathe nitrogen and oxygen become toxic in such high concentrations. Deep-sea animals do not have this problem because they are not breathing air, but only the oxygen dissolved in sea water, which is sparse at great depths. * At extreme depths, the pressure of the water would be greater even than the air pressure inside a typical scuba tank.

Most rocks are not entirely waterproof - they have cracks and channels where water can seep through.

Caves are often found in limestone rock, which is easily dissolved by rainwater seepage through tiny channels. The rainwater contains dissolved carbon dioxide, which makes it slightly acid, which dissolves the limestone very effectively. When a lime rich water droplet evaporates (dries up) on the roof of a cave the tiny amounts of lime are left behind in the form of stalactites.

The water in caves accumulates slowly and can be very old water - water that fell as rain thousands of years ago.

U.S. Virginia and British Astute class Fast-Attack submarines are considered the 2 top state of the art submarines in the world today. The U.S. and Britain often share technology, and as such the capabilities of each are similar.

Uss nautilus

ALVIN (DSV-2), contrary to popular belief, was not named for the chipmunk of the same name. It was so named in honor of the creative inspiration and mover behind the project, Woods Hole Oceanographic Institute oceanographer Dr. Allyn C. Vine. The name is a hybrid of the first 2 initials of his first name, and the first 3 initials of his last name.

German Long Range U-Boat (1943)

Lenght in Meters = 68m

Beam (wide) = 5.5m

In Comparison to a 1981 Russian Typhoon Class ( Biggest Sub Ever Made)

173m Long

25m wide

The early SS and the newer GATO Class diesel submarines.

They were at war with each other.

Classified.