The U.S. Navy still argue the operational effectiveness of conventional submarines, as well as whether to buy conventional submarines. This happens for two reasons, one, the current U.S. Navy may not be able to maintain 40 to 45 attack submarines, the quiet performance of modern diesel-electric submarines stronger than nuclear submarines, especially in coastal waters. The use of the modern passive sensor supplier, a diesel-electric submarines underwater movement is the best weapon to attack other diesel-electric submarines. -Sea combat nuclear submarine is more suitable, in particular the need for the long voyage to reach issues waters, but the diesel-electric submarines in the coastal waters with a battery-powered voice is very small, it is difficult to be detected.
The past 10 years, the U.S. Navy has been assessing the submarine threat facing, from 2005 to 2007, the United States leased a Swedish Submarine (Swedish only equipped with a five submarines), employ a submarine crew want to set in the imaginary enemy as an exercise to help U.S. anti-submarine forces to study the anti-submarine tactics, and as a preferred mode of training. Sweden's Gotland (Gotland) class submarine displacement of 1500 tons, 64.5 meters long (200 feet), containing members 25 are generally small submarines, currently moored in San Diego, a 36 U.S. organizations responsible for the maintenance of the submarine maintenance.
Before the introduction of the "Gotland class submarines, the U.S. Navy has been using the Australian submarine training often fails, but the submarine. "Gotland" class submarines equipped air independent propulsion system (AIP), the good performance of underwater noise reduction, longer battery life, so similar to the face and the future of the U.S. surface ships or submarines opponents. Opponents such as Iran and North Korea are not equipped with AIP submarine, but has enough diesel-electric submarines, the crew trained, quite deadly threat.
Based on the lessons from Australia and Sweden submarines, the U.S. Navy has secretly developed a new anti-submarine tactics and equipment, confirm that the modern diesel-electric submarines still the main threat of the U.S. surface ships and submarines. Potential opponents at the same time, the construction of more affordable diesel-electric submarines, being trained crew tracking the ability of American warships. The increasing number of enemy submarines, diesel-electric submarines of the United States in offshore search and there are technical problems, so the defense of the United States has been in the "limp".
China plans to exclude the U.S. Navy in its exclusive economic zone beyond its submarines have received anti-tracking training, U.S. submarines, surface ships and aircraft difficult to detect Chinese submarines. Currently, some aquatic species due to environmental organizations protest sensor manufacturer used by the U.S. anti-submarine training injury, the U.S. Navy lost underwater anti-submarine warfare training venues in Southern California.
Meanwhile, China is to increase investment in military construction, the threat of North Korea and Iran's fleet is declining. Therefore, if the U.S. Navy must pay special attention to the development of some of the diesel-electric submarines, they must be in China. Now, China will continue to develop a world-class nuclear submarines, but also did not give up the construction of a world-class diesel-electric conventional submarines.
