Aboard your hypothetical submarine, a pistol bullet might penetrate and damage any one of hundreds of electronic or mechanical devices. However, nothing designed to resist sea pressure, such as the hull or valvework, would be penetrated or seriously damaged.
The name is foreboding and fairly self-explanatory; it's when the submarine goes so deep the water pressure crushes it, causing an implosion. The crush depth of most submarines is classified, but it's likely to be more than 400 metres.
Flooding at depth happens really fast, because of the high pressure of the sea water. Rupture from a depth charge: There would be a big gaping hole in the side of the submarine. Water would come rushing in, and everyone would die by drowning.
By Archimedes' law, once the average density is greater than the density of water, the diver sinks. This explains one way that submarines can or sink or rise. Pumping enough water into the ballast tanks can cause sinking, and pumping enough water out of these tanks can cause rising.
This caffeine-underground invention drops a serving of espresso (tastes best made short, about 1 ounce) into a cup of regular drip coffee. Caffeine overload aside, this can be a very pleasant and complex drink, particularly when the coffee is freshly brewed. (
The United States Navy commissioned 175 Fletcher-class
destroyers between 1942 and 1944, more than any other
destroyer class, and the design was generally regarded as highly successful.
Fletcher-class destroyer.
| Class overview |
|---|
| Succeeded by: | Allen M. Sumner class |
| Subclasses: | Ariake class |
| Cost: | $6 million |
| Built: | 3 March 1941 to 22 February 1945 |
The Akitzuki class were formidable ships and arguably the finest destroyers of WW II. These large, seaworthy destroyers had a full load displacement of 3700 tons. They were designed primarily as AA destroyers and fielded a main battery of 8-3.9" (100mm) DP guns and (initially) a light AA battery of four 25mm guns.
HMS Greyhound was a G-class destroyer built for the Royal Navy in the 1930s. Greyhound participated in the Norwegian Campaign in April 1940, the Dunkirk evacuation in May and the Battle of Dakar in September before being transferred to the Mediterranean Fleet in November.
A submarine will typically carry 12 to 38 torpedoes or missiles shared by between four and eight torpedo tubes. Missile tubes, meanwhile, which are typically mounted vertically on the top of the hull, carry one missile each.
The Navy announced today a ban on smoking aboard submarines while they are deployed below the surface after medical testing showed non-smokers suffered effects of second-hand smoke. Mark Jones of the Commander Naval Submarine Forces out of Norfolk, Va., said about 40 percent of the submarine sailors are smokers.
At about 10–12 meters (33–40 feet) of depth, pressure of water column above you (1 extra atmosphere of pressure per 10 meters) will compress air spaces in your body by half, with lungs compressing the most by the absolute volume.
Human bone crushes at about 11159 kg per square inch. This means we'd have to dive to about 35.5 km depth before bone crushes. This is three times as deep as the deepest point in our ocean.
Submarines are relatively unaffected by weather or tsunamis when submerged in deep open waters. However if a submarine has to go shallow or to periscope depth then conditions on the surface become a major concern. Large enough waves can cause a submarine to be pulled (sucked) up to the surface.
A U-boat of this type, listed for decades as being sunk off Gibraltar, was found on the sea bottom about 60 miles off the coast of New Jersey in 1991. According to the definitive website Uboat.org, a total of 50 German U-boats remained unaccounted for after the end of World War II.
The longest submerged and unsupported patrol made public is 111 days (57,085 km 30,804 nautical miles) by HM Submarine Warspite (Cdr J. G. F. Cooke RN) in the South Atlantic from 25 November 1982 to 15 March 1983.
Oxygen is supplied either from pressurized tanks, an oxygen generator (which can form oxygen from the electrolysis of water) or some sort of "oxygen canister" that releases oxygen by a very hot chemical reaction. The carbon dioxide is trapped in the soda lime by a chemical reaction and removed from the air.
Virtually all narco submarines interdicted at sea have been more correctly termed low-profile vessels (LPVs). Also known as semi-submersibles, these are craft designed to run exceptionally low in the water to avoid detection. But they cannot fully submerge.
Glider
- The Best Submarine of the war was without question is the German Type XXI.
- The Best submarine in service in numbers during the war were the American Fleet submarines.
- I would suggest that the best submarine at the start of the war 1939 was from from Poland.
After 48 hours, it would be unbearable and you would have to surface. The World War II submarine that had the longest possible underwater endurance was the German Type 21. It could stay down for up to 75 hours, which gives you a tad over 3 days.
The fastest ones as of now can do well over 30–35 knots. The fastest ones were the Soviet Alfa and Papa classes, at well over 40 knots, but they're not around anymore.
Specifications
| Country | Class | Diving depth (feet) |
|---|
| Netherlands | O21 Class | 115m |
| United Kingdom | T-class | 300-350 |
| United Kingdom | U-class | 300 |
| United States | Gato | 300-400 |
Victor Vescovo set a new deep-diving record and is the first human to make multiple dives, solo, to its depths in the DSV Limiting Factor (Triton 36000/2 model submersible) the world's deepest diving, currently operational submarine.
One team would play as the escort commanders, the other as the U-boat captains. They would take turns to make their moves, firing torpedoes, dropping depth charges, the U-boats diving and surfacing to make their attacks, the escort ships wheeling around in great arcs as each side hunted the other.
