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Submarines
Submarines are naval craft that can operate for an extended period of time underwater. They are used primarily as warships, as well as for business, scientific and other purposes. Submarines are different from submersibles, which only have limited underwater capability.
2,056 Questions
Was the submarine effective in World War I?
Yes, A German U-Boat sunk The Lusitania, eventually causing The United States to join the war, I'd say that's a huge impact.
Undoubtedly. The submarine came of age in World War 1, but its success was less than it could have been because admirals preferred to fight with massive fleets of surface ships. Navies had submarines in earlier wars (late 1800's, early 1900's), but they were held out of action. In World War 1, the submarine proved itself a warship that could no longer be ignored. As evidence that submarines were not taken seriously before the war, no anti-submarine weapons were invented until after submarines began sinking enemy ships.
The most famous submarines of WWI were the German U-Boats (U standing for Untersee, the German word for underwater)
What is fired from submarines?
Weapons launched (fired) from submarines include torpedoes, ballistic missiles, or cruise missiles. These are the primary weapons, and a few other options exist.
Can submarines go from New York to Chicago?
Yes they can. They would follow the same route freighters use. But they would run on the surface. It would be far to dangerous for a submarine to make the trip submerged.
How does a submarine survive the pressure in the deep sea?
Submarine hull shape and its construction is designed specifically to operate at deep ocean pressures. Specifically, spherical shapes are stronger under extreme pressure, and most submarines are constructed of flexible metals that allow them to contract and expand as the pressure changes.
Of course there's a limit as to how much pressure it can take, and that also is determined by the vessel's construction and design. For example, the Bathyscaphe Trieste has been to the bottom of the Challenger Deep in the Marianas Trench, the deepest point known in the ocean; her design is highly spherical and small to withstand such pressures. By comparison, a Russian ALFA, with a Titanium hull, is rated at 3,000 feet crush depth - but it can't maintain it for long, nor can it go to such depths that often because Titanium is a brittle metal when repeatedly exposed to high pressures.
How do submarine use Archimedes' principle?
Using Archimedes' Principle, it is clear that a change in mass of an object affects how much liquid has to be displaced. In submarines, this is controlled by ballast tanks which are found between the submarine's inner and outer hulls.. When the tanks are empty, the submarine has less mass and it floats like a normal ship. As water is allowed into the tanks, the mass of the submarine increases, the downward gravitational force on the submarine increases and the submarine begins to sink. Careful balancing of the water ballast enables the craft to stay at any chosen depth.
Did submarines have the greatest impact on World War I?
That's debatable because Germans used them a lot to prevent trade. Yet they are also 1 of the main reasons the United States entered the war. The United states entered the war because the Germans kept breaking the rules we set and didn't keep their promises with the submarine warfare. So the answer would be yes, they were one of the greatest impacts on World War 1.
How did President Wilson react to Germany's use of submarines?
President Wilson reacted by asking the Congress to declare war on Germany.
Narrowly re-elected in 1916, Wilson's second term centered on World War I. He based his re-election campaign around the slogan "he kept us out of the war," but U.S. neutrality was challenged in early 1917 when the German government proposed to Mexico a military alliance in a war against the U.S. When Germany began unrestricted submarine warfare, among other things sinking the Lusitania without warning, as well as any merchant ship its submarines could find regardless of the country it belonged to, Wilson asked Congress to declare war in April 1917.
How many years did it take Robert ballard to build there submarine?
Ballard didn't build anything; he's always used submersibles provided by the U.S. Navy.
Where were submarines used during world war 1?
For German subs: Their primary mission was sinking merchant vessels; the very same mission they would have in the next war...how Great Britain could get fooled twice within a 20 year time frame from the VERY same enemy, same ocean, same weapon, same tactic, same strategy; is something historians...will simply have to "try" to be polite about, when talking about it.
How did submarine torpedoes affect WW 2?
The torpedo was the number one killer of ships and submarines, on all sides, during WW2. The total tonnage of ships sunk by torpedo vastly outweighs that of the second-most-common weapon, the aerial bomb, with the naval mine and naval gunfire contributing a miniscule amount.
From the Allied side, torpedoes were useful again the German U-Boats (though bombs, depth charges, the "Hedgehog" device, and other weapons counted for more UBoat kills) and an important weapon in the Battle for the Atlantic, primarily against German coastal shipping and many German surface ships engaged in shipping raiding.
In the Pacific and Mediterranean theaters, Allied torpedoes were devastating against Axis shipping, claiming over 90% of all tonnage sunk during the war. They are also likely the number one killer of Axis naval vessels, though aerial bombing may vie for that title. Torpedoes resulted in the almost complete starvation (of both food and war material) of Axis forces in North Africa andthroughout the entire Japanese Empire.
For the Axis, the torpedo was the U-Boat's primary weapon, and it was extremely effective. Virtually all Allied shipping losses (and the majority of naval warship losses) in the Battle for the Atlantic were due to submarine-launched torpedoes. The U-Boat-launched torpedo was so spectacularly successful when first deployed that Great Britain very nearly collapsed due to an inability to import sufficient food and war material - exactly how close we may never know, but in the dark days of 1940, U-Boats were sinking ships faster than either the US or UK could build them, and the UK was importing less than half its required monthly food.
The German Uboats and Italian motor-torpedo boats also were highly successful in the Mediterranean theater, accounting for the majority of allied shipping and naval losses, though it was closely followed by aerial bombs.
In the Pacific and Indian theaters, Japanese submarines scored significant successes, but the real threat was aerial torpedoes, launched from planes. Japanese aerial torpedoes account for the majority of ships sunk by planes. Additionally, the Japanese "Long-Lance" torpedo - mostly mounted on destroyers - was highly effective against Allied naval vessels, sinking more Allied ships than any other source in 1941-42.
Frankly, it is hard to think of any other weapon, land or naval, that had a greater impact on the course of WW2.
What does buoyancy have to do with submarines?
Buoyancy is extremely important in submarines. To sink or dive, they must achieve a very delicate 'negative' buoyancy. It could be very dangerous to sink too fast. Water is pumped into the submarines ballast tanks to make them sink, then later is blown out by compressed air to give them 'positive' buoyancy and make them rise. - While cruising underneath the surface it's very important to achieve a state of 'neutral' buoyancy allowing the sub to rise or fall according to the movements of it's 'planes' ( a wing-like device similar to aircraft 'elevators') . The 'planesman 'on any submarine has a very important job of keeping it at assigned depth.
To complicate this, the sea is not all the same - under the surface there are currents flowing almost like rivers, and 'saline' layers of different densities of water. All of these can change the depth of a neutrally balanced boat.
It varies by the type of submarine. United States, Russia, United Kingdom, China, France, and India are examples of nations who have or are assumed to have nuclear submarine capabilities.
For security purposes, governments don't give out full specifications on their weapons of war, especially on something as big, expensive, and instrumental as a submarine. The true depth information is classified, probably above "Top Secret". For the general US submarine fleet, the "official" answer is typically around 600 feet. (According to one Navy instructor it was changed from 400 feet when a documentary was aired accidentally showing footage of the depth meter at a depth of around that depth.)
Any Navy in the world who operates a nuclear submarine is going to publish a low ballpark figure in the name of national security and secrecy. If everyone knew the exact depth a submarine could submerse to, it'd be easier to kill them. Wikipedia says a Soviet/Russian class Alpha submarine may have successfully operated at a depth of 4,300 feet. But rest assured whatever the published depth of submarine is, it many times greater than that.
Is glass used in deep diving submarines?
Yes, extremely thick plate glass has been used for windows, and glass is also utilized for external cameras.
How many people can a submarine carry?
Average crew complement (depending on mission / deployment status) can be between 90 - 160, depending on the boat class. Standard for most boats is between 90-120 for normal operations.
What can you do to resist pressure from peers?
Let us try and understand just what peer pressure is. It when one is influenced by ones peers, either to you have change your mind when you have decided to do something. Your peers however try and steer you in a more positive direction. This is when peer pressure can come in handy and is acceptable. The other kind is when you are pressured into doing something against all you believe in. So you see there is positive and negative pressures. To resist negative pressure is to consider the consequences of your actions. How will it affect you or your family or friends. Negative peers are not friends but influential bullies.
How did submarines change naval warfare in ww1 from what had been experienced?
Prior to WWI, belligerents observed "Prize" or "Cruiser" rules, which stated that the ship couldn't sink a passenger ship, only a merchant vessel of an enemy nation, and that the crew/passengers aboard any vessel must be clear and safe before it was sunk. These rules were from the days of sailing vessels, and with WWI and the advent of submarine warfare and modern weapons, it didn't take long to determine that those rules were obsolete. This was essentially the basis for Germany's initial submarine warfare policy.
Though Germany initially tried to comply with Prize Rules, as WWI submarine warfare progressed, it became apparent that those rules were outdated and even dangerous. With its practice of warning ships and allowing passengers and crew to leave prior to sinking, it meant that the attacking submarine would be a sitting duck to any enemy vessels or aircraft. The ship's crew only needed to summon military assistance by radio, and the passengers and crew could take their time to evacuate the ship, giving time for aid to arrive.
What is the most advanced gadget in the world?
I hate to give an obvious answer, but the ipohone and the ipod touch are amazing little machines. Audio, video and web access in a small package. Plus all the add on programs.
How many types of ships are there?
some types of ships are:
ferry
cruise ship
frigate
destroyer
aircraft carrier
Submarines are steered like any other Naval vessel, using a system of high-pressure hydraulics operated from the Helm by a qualified helmsman. The rudder is also capable of being moved by hydraulic handpump if the main hydraulic pumps are out for some reason (not easily either).
What do oceanographers use submarines for?
oceanographers use submarines to take pictures of sea life and things that have been found or things that they are looking for.
What happened to the German Submarine U-55?
The German Type VIIB U-Boat U-55, under the command of Kapitanleutnant Werner Heidel, was sunk by British and French warships and a British air strike 90 miles SW of the Isles of Scilly (English Channel), coordinates 48.37N, 07.48W, on January 30, 1940.
Though credited with sinking 6 Allied ships, she was sunk on her first and only war patrol. There were 41 survivors and 1 KIA, Heidel, who apparently went down with his boat after getting his crew to safety. Unlike many other U-Boats, the U-55 did not suffer any crew accidents/casualties until she was sunk, making her a rarity in the U-boat fleet.
Source Credit: U-Boat.net (see link below)
