Submarines

The Navy's SUBASE is officially located in New London, Connecticut, along the Thames River and near Long Island Sound. The neighboring town of Groton is also home to portions of the base, including the training station. Electric Boat, a Naval contractor which builds submarines is also in Groton.

Limited underwater speed and battery capacity, they often had to surface to recharge the batteries, a dangerous job, as fumes could be discharged making the ship a sitting duck for even a low flying scout plane with incendiary bullets- or tracers, aim for the battery boxes. The Russians, give "em credit aimed at eliminating part of this hazard with their Turbo-electric two-shaft A-9 class of Fleet or as we would say task-force submarines.designed to operate with surface craft. these had high surface speed- as did the much later Gamma Boats, and could recharge the batteries at ( Siphon depth) with about 2/3 propulsive power available. no US sub could do this at that time (ww-l;) The A-9 was the top=-fleet almost said top-flight Czarisr Russian sub.

In their history, submarines were called by many names such as 'U-boats', 'eel boats', 'plunging boats', 'devil divers', and 'pig boats'. Technically, and by size, the submarine is a ship, but it has been called a boat since its earliest days, and the term is steeped in tradition. Submariners almost invariably call their ships 'boats".

Mercury used as ballast

If you're referring to the German U-boat attack that killed 128 Americans in 1915, that was the RMS Lusitania. The ship was actually a British passenger liner (similar to RMS Titanic) that was torpedoed off the Irish coast. She exploded violently, and was supposedly carrying munitions from the United States to Great Britain.

That is David Bushnell's 'Turtle'

I think you've confused WWII with WWI because as far as I remember Germany had submarines called U boats that were used to blockade Europe from the rest of the world in WWI . Either way the answer to whatever you're asking is definitely Germany.
This striking first appearance of the submarine in war time history occurred on the 22nd September 1914, when SM U-9 sank the three cruisers HMS Aboukir, Hogue and Cressy (12, 000 tons each) off the Hook of Holland in 75mins. But the u-boats were from Germany..
Germany. They've been calling them "Undersea Boats" since they commissioned their first U1 in 1906, right after the Russo-Japanese War...for which they had originally been intended for.
Germany called their subs, "Under-Sea-Boats." German enthusiasts will spell it, "Boots" instead of "Boats."
Germany. U is for Untersee -under-sea; so U-boat is an Unterseeboot.
Germany. They were called U-boats.
Germany. The term is actually U-boot, with the German word "Boot" being pronounced approximately like the English "boat," not like the English "boot." "U-boot" is short for "Unterseeboot," meaning "under-sea boat."
The country is Germany. It is also spelled U-Boat. It originally stood for Unterseeboot. It was then shortened to U-Boot, then into U-Boat.
German submarines were called U-boats. The "U" stood for Underwater,so the submarines were known as Underwater Boats. The Germans even used this in the identification of individual vessels. U-571, U-362 etc.

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there are far more than two main kinds of submarines. The only two sections I can think of to separate them are fast attack and Boomers or Ballistic Missle.

The very same materials that are used for missiles. A torpedo is an under-water missile. They are constructed of metals with rubber/plastic/etc. parts: Copper wiring, aluminum, steel, and other materials that are most likely classified.

U-boat is the anglicized version of the German word U-Boot , itself an abbreviation of Unterseeboot (undersea boat), and refers to military submarines operated by Germany in World War I and II. The primary targets of the U-boat campaigns in both world wars were the merchant convoys bringing supplies from Canada and the United States to Europe. Austrian submarines of World War I were also known as "U-boats". The distinction between U-boat and submarine is common in English-language usage (where U-boat refers exclusively to the German vessels of the World Wars) but is unknown in German, in which the term U-Boot refers to any submarine.

The term is actually an English-pronunciation version of the Dutch term "Schipper" (the "sch" spoken as a "sk" in Dutch). "Schip" is the term for a ship, so a "Schipper" is one who captains a boat or vessel.

In the military, Captains of any vessel type aren't called by that term unless permission is specifically granted.

My best guess is that it was probably a piece of 1"X6" board, attached to a couple of roller skate wheels that some kid put together with nails and a hammer in the garage.

In the old days, roller skates were a clamp on type that had a metal frame which you could attach to your shoes. The front wheels and the rear wheels were uwsually made of steel for sidewalk use and could be separated, leaving a bit of metal framework for each set of wheels. If one of the pair of skates broke, there wasn't a lot you could do with a single skate.

Kids are inventive. Need I say more?

actually it wasnt a kid that invented it it was a guy named bill Richard. him and some roller blade company did that. then a women tha owned a surfing company decided to start making them her name was Makaha she was one of the manufacters. and it wasn't intill the 1950's that they where frist invented and then just went from there. Google that it up it exists. anyway it wasn't with hammer and nails either otherwise the wheels wouldn't turn or even move. plus it wasnt that old as u can see from what i put up earlyer, and yes i agree with that kids are inventive but i don't think they would have the brain power at that time to invent somthing like that, that actually worked. so for all u skateboarders who love to skateboard say thanks to bill Richard. he's the one that made it all possible. Also in the 1950's back then it was called "sidewalk surfing".. just somthing i thought u all should know.

Having made skateboards from skates in the 1950's I can tell you exactly how it was done. Many of us had Roller Derby-type skates in those days - the kind that clamped onto your shoes. We'd first removed the clamps on the front of the skates. Using a hacksaw, we cut off the heel of the skates. Now we have a flat surface to work with. Yes, we used nails and just bent them over the skates attaching them to a 1x6 board. We'd use a wood saw to round the front and back of the board. If you were lucky, somebody's Dad in the neighborhood had a drill with metal bits. If you had that, then you could drill holes in the skates and mount the skates to the board with screws rather than nails. This was a much more sturdy design. The rear of the skate was attached to the rear of the skateboard and the front of the skate was attached to the front of the skateboard. Finally, leaning to one side or the other did not result in a sharp turn, at least not that you could make a corner on a sidewalk at the end of the street. We removed or cut-down in size the rubber piece on each skate truck. That did the trick but it also made the skateboard much more unstable. You could fall much more easily but you sure could make a turn well. We'd decorate them with paint. We did this about 1957 in Hermosa Beach, California. We had some hairy rides down 8th Place toward Pacific Coast highway. Those were the days.

The first submarine looked like an egg pointing upwards. It had a window in front and had robotic arms to attach bombs to warships. It was named as "the Turtle".

To enter or exit (or escape from) a submarine you must locate a hatch in the pressure hull. There is usually a hatch near the bow, the stern, and amidships, and each is set atop a feature called an escape trunk. The escape trunk is a small "compartment" with an inner hatch, and it is set up to provide a way to "lock out" a group of submariners that is making an emergency exit under water. A torpedo tube might also be used to escape.

WWII US Gato class subs could be built in 9 months.

Submarines have air systems aboard that add oxygen (O2) and remove carbon dioxide (CO2) from the atmosphere aboard. This keeps the crew from suffocating.

Periscope

England controlled the seas, having both the largest fleet and the easiest access to the oceans. The German fleet was large but could be easily bottled up so the German High Command saw Submarine warfare as a method of reducing the impact of the English Battleships AND of affecting morale in England by forcing rationing on the population.

Microwaves would be a great way to communicate with submarines, but they'd have to surface to use that method of connecting. Surfacing would defeat the purpose of having the submarine out there, and could easily expose it to detection. We do use radio to communicate with submarines, but not microwaves. Microwave energy has a very limited ability to penetrate water. Very low frequencies can penetrate water to a certain extent, though. And that's why we don't bother with microwaves for submarine communication.

Captain Daniel V. Gallery, then Commanding Officer of the USS Guadalcanal, and Commander of Task Group 22.3, was responsible for the capture of the German U-Boat U-505 intact off the coast of West Africa on June 4, 1944, just 2 days before the Normandy Invasion.

Gallery took the initiative in the attempt to recover the U-505's Enigma machine and codebooks, but a little known fact is that he was nearly court-martialed for doing so. Unbeknown to him, the Navy and Allied Commanders had kept the fact that the HMS Bulldog had already captured an Enigma following her engagement with the German U-110 in 1941, along with her codebooks. The Allies had been secretly reading German Enigma communications for years, being both instrumental in the defeat of U-Boat operations in the North Atlantic as well as one of the most closely guarded secrets of the war. The Germans felt that the Enigma code was unbreakable - if the slightest hint that one of their U-Boats had been captured had been leaked, they would have immediately changed their coding system. During the beginning of WWII, the Allied inability to read German Enigma messages was a huge and costly liability.

However, it was found that the codebooks recovered allowed the Allies to read a special coordinate cipher, which in Navy terms means he was off the hook. In the end, he was commended for his actions along with the rest of the Task Group. A Presidential Unit Citation, Medal of Honor (awarded to Lt(jg) Albert David, the officer who lead the boarders), Navy Crosses and other awards were among those given to sailors involved in the capture.

This operation was also the first use of the Navy term "Boarders Away!" since the 19th Century.

A nuclear submarine has a reactor . There is no liquid fuel at all.

Cornelius Drebbel did not actually invent the submarine. He was the first person to manufacture a workable submarine, but he used the 1578 plans of English mathematician William Bourne. Drebbel built his submarine using a wooden frame tightly wrapped with waterproof leather.
Cornelius Drebbel did not actually invent the submarine. He was the first person to manufacture a workable submarine, but he used the 1578 plans of English mathematician William Bourne. Drebbel built his submarine using a wooden frame tightly wrapped with waterproof leather.

Lightning does strike ships.