Submarines

An unmaned submarine can go down to 15000

because theyre rescue vessels were in poor condition and the rescue subs were badly crewed

Submarine hulls are subject to sea pressure, and that pressure increases the deeper the submarine goes. There are design limits to the amount of pressure that a hull can take, and if that pressure is exceeded by diving too deep, the hull will fail and will be crushed.

There was no submarine that could do that as early as 1945

The Hunley is currently undergoing restoration and research in Charleston, S.C., site of her attack on the USS Housatonic.

January 23, 1960. The Trieste made it to the bottom of Challeger Deep which is the deepest point in all the world's oceans.

Water enters the submarine by entering through the butthole and leaving from the propellers

As of earlier this year (2012) the U.S. Navy qualified its first female submariner, with several more in the pipeline.

However, for now (and likely the foreseeable future), female crew are limited to officers only, since they're afforded their own staterooms and the privacy concerns are reduced considerably.

Both the Union and the Confederate had submarines, but the Confederate used them more often.

Modern nuclear submarines can work (or patrol) for 3 months or more.

In 1957, the Lawrence Livermore National Laboratory was selected to develop the nuclear warhead for the UGM-27 Polaris SLBM.

In Germany we say uuuhhh and U is an abbreviation for Unterwasser (underwater) So in English you would say Underwaterboat

A submarine's main screw shaft length is totally dependent on the size of the vessel, but in general, anywhere from 30 to 50 feet.

There are generally 2 periscopes, the Primary and the Attack scopes.

The Primary periscope is normally used during normal periscope depth observations of the ocean surface (to verify known Sonar contacts and to search for any not picked up by Sonar) and the sky (aerial targets). In addition to optics, it also contains electronic sensors that receive a multitude of signals, including intelligence and navigation.

The Attack scope is a much smaller profile scope, and as such is much harder to detect during submerged periscope depth approaches or observations. It is only used for final surface target range calculation, or in those instances where extreme stealth is required during periscope operations. It also server as the backup scope (everything on a submarine has at least 1 backup system) should the primary become unavailable. Due to its size, it normally doesn't carry the sensory features of the Primary.

Peru Chili Trench

A submarine is an undersea boat, or submersible.

In World War I, the Germans used submarines mainly to create a Submarine Blockade on Britain in an attempt to starve Britain out of the war. This blockade is similar to the Naval Blockade Britain used on Germany, but was not as effective, and Germany stopped halfway through the war. However, towards the end of the war when Germany was losing, they restarted the 'unrestricted submarine blockade', which accidentally sunk an American passenger ship. This angered America, leading to America's participation in the war, and the ultimate defeat of Germany.

The number varied, but at the height of President Reagan's 500-ship Navy program, the U.S. totaled around 90 submarines, including Fast-Attack, Ballistic Missile, and Diesel-Electric (4).

Like all ballistic missiles, the old Polaris missiles and the current Trident missiles use internal gyros for stability in flight.

Submarines

The submarine referenced is the USS Bowfin (SS-287) but stock footage and sets were used in the film. The Navy did not allow filming onboard submarines until the end of the Cold War, and even then it's strictly regulated for security reasons. Even submarine crewmembers require permission from the CO to have a camera aboard ship.

A full scale replica of the Argonaut Jr. is in Atlantic Highlands, New Jersey.

the SSBN's or balistic missle submarines are on strategic deterrance. the only class of SSBN's the navy currently has is the Ohio class. 726-743.

although the Ohio itself, SSBN 726 is undergoing conversion to SSGN, replacing its balistic missles with guided conventional payload missles.

Women have been riding submarines for many decades; however, until the current U.S. Administration changed policy, women have not been allowed to serve aboard submarines for a variety of reasons, but in general since it's hazardous duty and has safety hazards that affect women more than men.

While "social experiments" and the desire to serve aboard a submarine are great goals, in practice it's easy to want something when you don't know the risks involved, and the risks aren't publicly known since minimum clearance for anything regarding a modern submarine is Secret/NOFORN. Few submariners (myself included) ever get away from submarine duty without some health problem, be it lung related, mental, or cancer. The British Royal Navy's policy against women serving aboard submarines is specific, stating the radiation danger to a woman's fetus as the primary factor. Of course that's BS (radiation levels on board modern boats are less than you get from the sun) but the dangers to the female reproductive system from other chemical agents and radiation sources other than the reactor are very real. Of course that's not in the recruiting brochure when you're asked to volunteer.

It remains to be seen if the policy shift will actually take effect - unlike the changes with gays and women aboard combat ships, flying combat missions, etc., submarine duty is strictly a volunteer force, and the Navy could wind up with a mass exodus of qualified sailors from the submarine force if they push the issue. Navy life in a submarine isn't like a regular ship, and the mental stresses are hard enough without any other distractions.

One of the biggest opponents of women serving aboard boats is the wives of current submariners. Divorce rates for the submarine force typically run around 70%, given the long absences without any communication (unlike surface ships), and above average port destinations. The thought of any woman in such close quarters does not sit will with most wives.

In the past, women who ride submarines temporarily are usually assigned quarters in the XO or CO's stateroom, which has its own head facility. The biggest problem is the complete lack of privacy, even in officer and senior enllsted areas.

As of May 2011, Submarine Base Groton has received its first female candidates for submarine duty. However, they are female officers, and will be assigned to SSBN's and SSGN's due to the minimal impact on crew co-habitation.