US and German Submarines in WWII eleanor de block

  • Germany used diesel-electric submarines against US and British shipping.
  • U-boats were typically accompanied by U-cruisers to refuel the submarines.
  • U-boats could be spotted about seven miles away because of new radar technology.
  • At the beginning of the war, Germany had fifty-seven in service, and ten U-boats being built.
  • The Treaty of Versailles took away Germany's U-boats.
  • U-boats caused so much havoc, that Winston Churchill almost considered surrender.
  • In an attempt to hide the u-boats, Germany used a breathing tube so that they could run on diesel just below the surface, but returned a decent radar blip.
  • U-boats took too long to build. The Kriegsmarine made the amount of U-boats in anticipation of a short war.
  • u-boat type VIIC could travel at a top speed of seventeen knots per hour, but had a limited range.(Type VIIC was the standard.)
  • Later in the war, U-boats utilized streamlined hulls and could travel upwards of twenty knots per hour for short periods of time.
  • At the beginning of the war, Germany had thirty-eight sea-going U-boats.
  • U-boats were controlled by radio. The speaking was coded, but, it was easy to tell when they were going back from their signature sign-off on a few predictable routes.
  • When the fleet was in trouble, Hitler ordered for the Walter-boat prototype to be built. However, there was not enough time or money.
  • In 1942, aircrafts were accounting for one half of the U-boat sinks.
  • U-boats sank seven-hundred twelve merchant boats; ships were being sunk at twice the replacement rate.
  • Major Doenitz wanted to attack the east coast of the US, but, Hitler held him back.( It was tourist season anyway.
  • The torpedoes were not very accurate. In 1940, of the thirty attacks, only one ship was sunk.
  • Allied bombings of submarine factories prevented the type XXI from being built.( It would have been a huge weapon.)
  • The US had the largest and most powerful submarine force of the Allies in the Pacific.
  • US submarines had air conditioning, water distilleries, and were generally more comfortable than U-boats.
  • The US submarines at the beginning of the war were outdated.
  • The missiles used by the US in the Pacific war were defective.
  • US submarine production increased from six or seven per year to seventy-one (from the mid thirties) to seventy-one in 1940.
  • The Balao class was the largest class in the US fleet.
  • Submarines made up only two percent of the US Navy.
  • Pearl Harbor attacks barely reached the submarine base; a deadly mistake for the Japanese.
  • The US lost a total of three-thousand, five-hundred six men total in the Pacific theater and fifty-two submarines.
  • US submarines cut off supply lines to Japan completely by the end of the war.
  • US submarines sunk five million tons of shipping and crashed the Japanese economy.
  • Torpedoes in Manila and Midway were very inaccurate. Had they worked, Pearl Harbor may have been prevented or less severe.
  • The USS Balao had deck guns and twenty-four torpedoes.
  • The Balao had a range of twelve-thousand, four-hundred, twenty-seven, and four tenths miles.
  • The USS Bluefish survived from May 24, 1943 to the end of the war.
  • She was designed for endurance underwater.
  • The Bluefish sank seven-hundred fifty tons of enemy goods.
  • She served on nine war patrols.
  • The USS Bass was the oldest submarine to serve in world war two.
  • The USS Bass completed four war patrols.
  • A fire in the stern battery room killed the twenty-six member crew.
  • Submarines in World War Two were now developing adding the snorkel.
  • Torpedoes could now use acoustic honing or the magnetic pull of the target ship.
  • This time came with the development of the turbine propulsion system.
  • US submarines were typically larger than U-boats.
  • The US Navy found that three-hundred pounds of trinitrotoluene (TNT) was not enough to sink a U-boat, so they doubled it.
  • German scientist Helmuth Walter proposed the first true submarine; it could remain underwater, in theory, forever without needing more fuel or oxygen.
  • Doctor Ross Gunn of the US proposed the idea of fission chambers. The combination of isotope and uranium to power the submarines. This solution was more powerful and more efficient than gasoline.
  • In 1944 alone, US submarines sank more than five-hundred Japanese ships, which was more than 1941-43 combined.
  • The largest ship ever sunk was seventy-one thousand, eight-hundred ninety tons! It was sunk by the US submarine Archerfish.
  • The Japanese had no anti-submarine radar because they doubted that the Allies could do much damage.
  • After Pearl Harbor, US submarines had the go ahead to sink any Japanese ship.
  • US submarines caused significant losses in the heavy units of the Japanese Imperial Navy.
  • US submarines sank thirty percent of the Japanese Imperial Navy, including eight aircraft carriers.
  • World War Two submarines were generally surface vessels that could go underwater for a limited time.
  • The energy used to power the submarines on the surface was diesel, and the energy used under the surface was a short life battery.
  • The USS Robalo was too wide to launch stern first down the river because the river was narrow and winding.
  • The victory in the Philippeane sea included the sinking of three aircraft carriers, two of which were sunk by US submarines. The loss basically terminated the Japanese air force.

Works Cited

Submarine History 1914-1941: A Timeline of Development. Web. 20 Apr. 2017.

Submarine in World War II. Web. 20 Apr. 2017.

Submarine History 1945-2000: A Timeline of Development. Web. 20 Apr. 2017.

Submarine in World War II. Web. 20 Apr. 2017.

"Allied Submarines in the Pacific War." Wikipedia. Wikimedia Foundation, 18 Mar. 2017. Web. 20 Apr. 2017.

"Submarine." Britannica School, Encyclopædia Britannica, 3 Feb. 2017. Web. 27 Apr. 2017.

"U-boats." History Learning Site. Web. 20 Apr. 2017.

"U-boats." History Learning Site. Web. 20 Apr. 2017.

"USS Bass (SS-164) / (V-2 (SF-5) Diesel-Electric Ocean-Going Attack Submarine." Military Weapons. Web. 21 Apr. 2017.

"United States History." World War II Submarine Warfare. Web. 21 Apr. 2017.


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