Submarines

Counting warships & merchantman, US subs sunk about 1,000 vessels.

It was a French port, and the Germans planned to trap the retreating British forces on the continent. Only an heroic sealift rescued the British Expeditionary Force and most of the French First Army (May 24 to June 4, 1940).

Theodore Roosevelt rode in The Plunger.

A periscope.

Unlike today's modern submarines, in WWI and WWII, water usage was at a premium, and showers/shaving weren't as critical on a regular basis as the water was for basic survival. Today's submarines have seawater distillers to make potable water - back then fresh water was carried and used and when it ran out it was gone. Beards on submarines were common until 1983 when the Navy changed policy for facial hair, primary reason being interference with safety equipment usage (Emergency Air Breathing masks, etc.). Many submariners (myself included) who had to shave their beards had a hard adjustment since many of their families had never seen them clean shaven before except for pictures.

VERY scary !

There is no such thing as a safe submarine - there is a specific reason that submarine duty is strictly volunteer, and that submariners get hazardous duty pay, and it's due to the inherent increased dangers of submarine life, be it aboard a nuclear or diesel-electric submarine.

Without getting into classified specifics, there are significant increased health risks for women aboard boats as there are men, but the Navy doesn't specify those risks until the candidate has volunteered (and even then they don't say anything). Assuming you make it through the increased screening requirements (both psychological and physical), even then only about 5% of Navy volunteers are accepted as being qualified for submarine duty. Of that percentage, the average of those with health problems who serve aboard submarines is much higher than that of the regular Navy.

American Vice Admiral William S. Sims

During WW2, all the major countries involved used submarines.

Only nuclear submarines can go that long without refueling. The process of converting matter to energy releases a tremendous amount of energy from just a little bit of matter, so a fairly small amount of fuel lasts many years.

None beause they are all sunk in the sea because china are poor :P

2,200,000 Soldiers

97 Warships

40 Submarines.

Fluid friction is defined as occurring between layers within a fluid that are moving relative to each other. It is a resistance so it does not move a submarine through water.

The actual diving depths for Navy submarines is classified information. However, Deep Submergence Vehicles, such as the bathyscape Trieste, has been submerged to almost 11,000 meters (36,000 feet) in the Marianas Trench, at the time considered the deepest point in the ocean.

Cornelius Drebbel was a Dutch inventor who built the first submarine ever.

The first navigable submarine was built by Cornelius Drebbel in 1620 using the 1578 plans of English mathematician William Bourne.

Actually the submarine will not kill any one, but the rockets and torpedo launched from the submarine kill the people.

it didnt

New york harbor

David Bushnell's submersible Turtle, designed by Bushnell and built in Old Saybrook, Connecticut in 1775, was so named because it looked like a turtle due to its shape. It was manually powered, constructed of wood, heavily covered in pitch and reinforced with metal bands. Though it is considered the first submarine used in combat (Revolutionary War) its attacks on British warships were never successful. This was due in large part because it didn't have a way to penetrate the copper cladding around the lower part of British warship hulls. It was sunk by the British while attached to its tender.

The most massed produced US WWII sub was the Gato class, and they were 311 feet long.

sure, they all can reach the bottom... most of the time you don't want them to though.

the ocean varies in depth everywhere depending on where you are. modern subs can't sit at the bottom like old WWII boats could, the new ones have delecate sonar equipment among other things on the bottom. depending on the class, us navy ships can dive to ~2000 ft. but normally operate much higher than that.

A lot less than the average surface ship of similar size, and certainly not in a manner as harmful.

Modern submarines, like most vessels that are nuclear powered, don't leave behind any fuel oil waste; the only thing that is dumped overboard is waste from the sanitary tanks (fish food - think twice about eating fish) and trash, which is compacted into cans, weighted, and then dumped via a trash tube (essentially the same as a torpedo tube, but smaller and vertical, emptying out the bottom), where is sinks to the bottom of the ocean. Each can must be specifically weighted to ensure it will sink.

Only biodegradable waste products are allowed to be dumped; any materials that don't meet the criteria or are of a harmful nature are brought back to port and disposed of properly. Of course in emergencies, it's a different story, as crew / ship safety takes precedence.

Depends on which Navy, rank of officer and time served.

Royal Navy Submarine Warefare Officers starting salery (once they have qualified and are serving onboard) is around £40,000 a year.

It depends on the boat, but cramped is the best operational word for it. Even in the passageways there's not enough room for 2 people to walk side-by-side; you need to turn sideways to get by each other.

Aside from the occasional change in depth with angles, or high speed turns, you don't even really notice any movement when you're submerged like you would on a surface ship. It's essentially like being in a closed room or building, with no windows or frame of reference for time (e.g., daylight), for days, weeks, or months as the mission requires. The only way you really know what time of day it is is by what meal is being served.

Daily life is pretty structured; standard underway watches unless there's something special happening requiring target tracking or battlestations, training, qualifications, more training, more qualifications. Occasional movies, and once in a great while you actually get to sleep (but not often).