Yes - though most had manual reload capability, the German Type XXI U-Boat, which never saw active service, was the first true submarine with hydraulic reload capability. It was also the first true submersible, featuring a streamlined hull, no deck guns, and designed for running submerged as normal operation rather than just for attack purposes. Many of her features were the forerunners for today's modern submarine systems and design. Her sail is reminiscent of Russian submarine sail design.
They had difficulty in combating merchant convoys to and from their overseas allied nations, as German submarines were a huge threat. Their main tactic was the use of depth-charges, which even if they did not hit the submarine directly, created an overpressure effect which could rupture a sub's hull. They also relied heavily upon heavily-armed naval escorts which had the capacity to fire ship-borne torpedoes, as well as upon their own submarines to track and hunt down German and Japanese ones.
Their batteries could discharge deadly fumes.
Aircraft with bombs, torpedos and guns. There were also some small submarines that were to attack with torpedos.Kate torpedo bombers, Val dive bombers, and Zero fighters. The Navy used the Aircraft Carriers to launch the airplanes and 2-man submarines to sneak the the anti-sub nets and launch torpedoes. The most important weapon was the torpedeo. The American's torpedoes were not that reliable and they could not be dropped from an airplane except in deep water. The Japanese designed a way to drop the torpedoes in the shallow harbor.
The Koreans started to build it when the Battleships started to attack, then they put it in the submarines to do underwater attacks. Actually, no. The Germans were the first to really deploy submarines, naval ships that could effectively use torpedoes. The Koreans simply (but eventually) became the most successful at this until we were bombed, then Korea was left in the dust....
During World War I, submarines, primarily the German U-boats, operated by utilizing a combination of diesel engines for surface travel and electric batteries for submerged operations. They could dive to avoid detection and launch torpedoes against enemy ships, disrupting supply lines and engaging naval vessels. The effectiveness of submarines was enhanced by their stealth and ability to strike unexpectedly, leading to significant changes in naval warfare and prompting the development of countermeasures by other nations. Submarine warfare became a pivotal aspect of the conflict, influencing strategies and international policies.
U-Boats were German Submarines that caused havoc to the US Navy as well as merchant ships. They nearly cut off all trade between the US and Europe, as well as caused much damage to the US and Royal Navies. Their weapons were torpedoes fired just below the surface that if successfully hit their target could bring a ship down with ease.
There were no surface ships in a U-boat wolf pack. (The submarines, like American subs, were called, "Boats".) The smallest wolf packs were 2 to 4 submarines, while the largest wolf packs could contain up to 20 submarines. The size of the wolf packs always depended on what their commander, Karl Doenitz wanted them to do.
Steam powered submarine torpedoes had a flaw when a submarine fired torpedoes in daylight. The torpedoes created a massive stream of bubbles that rose to the surface of the ocean and enemy ships could see that they were under attack. The bubble stream also gave away a submarine's position. This problem was solved for the Germans when they developed electric torpedoes. No bubbles were produced. The US Navy captured some of the enemy torpedoes and used them for models of their own new electric torpedoes.
World War II submarines typically had operational dive depths ranging from about 200 to 400 feet (60 to 120 meters), depending on the class and design. For example, German U-boats could generally dive to around 750 feet (230 meters), while American submarines had similar capabilities. However, actual maximum depths could vary, and while submarines were designed for specific operational depths, they could be damaged or crushed if they exceeded those limits significantly.
In IT/ICT 'reload' means refresh or restart. For example if I told you to reload Internet Explorer, you could press 'F5' or shut off the program completely and load it up again.
Torpedoes - one perfectly shot torpedo could sink any ship, but you were also carrying around with you a very sensitive bomb that could sink your ship just as easily
People believed the Lusitania couldn't be sunk by German submarines partly because the Lusitania was the fastest ocean liner at the time (it's top speed was about 23 knots). This speed was fast enough to outrun any German submarine at the time. Submarines from that time period were extremely slow, especially when submerged. Their top speed when submerged was less than 10 knots. By the time a German submarine would aim to shoot a torpedo, people believed the Lusitania would've already outran it and be out of the U-boat's maximum torpedo range.