In 1968 there was an incident when a Soviet November-class submarine tracked an American carrier group traveling at 31 knots (57 km/h). This led the United States Navy to develop the Los Angeles-classsubmarines, whose reported speed is 30–32 knots (56–59 km/h).
There are established reports and manufacturer's claims that would indicate two (or perhaps more) submarines are capable of speeds exceeding 30 knots (56 km/h). In 1965, USS Albacore reported a speed of 33 knots (61 km/h), but this was not an official record. The Akula (Russian: shark)-class vessel is reportedly capable of travelling submerged at 35 knots (65 km/h), its predecessor, the Alfaclass, could attain short speed bursts of 40–45 knots (74–83 km/h) while submerged. There are claims that the Russian titanium submarine K-162 reached 44.7 knots (83 km/h) on sea trials, fully submerged, in 1969. However, due to the rather secretive nature of these vessels, confirmations of these numbers are not present.
The British Spearfish torpedo designed to counter high-speed Russian submarines, such as the Alfa-class submarine, is reputed to have a speed in excess of 70 knots (130 km/h). The Russian rocket-powered supercavitating torpedo VA-111 Shkval is reportedly capable of speed in excess of 200 knots (370 km/h). German press reports of an underwater anti-torpedo missile named Barracuda that allegedly reaches 220 knots (400 km/h). The United States Navy has contracted with the General Dynamics Electric Boat Division to support development of the Underwater Express, an undersea transport capable of controllable speeds up to 100 knots (185 km/h) through supercavitation.
The Swordfish is the fastest sea animal with a recorded speed of 97 km/h (60 mph). See Fastest animals.
The Los Angeles class of submarines are nuclear-powered fast attack submarines (SSN) in service with the United States Navy. Also known as the 688 class after the hull number of lead vessel USS Los Angeles (SSN-688), 62 were built from 1972 to 1996, the latter 23 to an improved 688i standard. As of 2020, 32 of the Los Angeles class remain in commission — more than any other class in the world — and they account for more than half of the U.S. Navy's 53 fast attack submarines.
USS Holland (SS-1) was the United States Navy's first modern commissioned submarine, although not the first military submarine of the United States, which was the 1775 submersible Turtle. The boat was originally laid down as Holland VI at the Crescent Shipyard of Elizabeth, New Jersey for John Holland's Holland Torpedo Boat Company, and launched on 17 May 1897. She was acquired by the USN on 11 April 1900 and commissioned on 12 October 1900, Lieutenant H. H. Caldwell commanding.
Supercavitation is the use of a cavitation bubble to reduce skin friction drag on a submerged object and enable high speeds. Applications include torpedoes and propellers, but in theory, the technique could be extended to an entire underwater vessel.
The Alfa class, Soviet designation Project 705 Lira, was a class of nuclear-powered attack submarines in service with the Soviet Navy and later with the Russian Navy. They were the fastest military submarines ever built, with only the prototype submarine K-222 exceeding them in submerged speed.
A midget submarine is any submarine under 150 tons, typically operated by a crew of one or two but sometimes up to six or nine, with little or no on-board living accommodation. They normally work with mother ships, from which they are launched and recovered and which provide living accommodation for the crew and support staff.
The VA-111 Shkval torpedo and its descendants are supercavitating torpedoes originally developed by the Soviet Union. They are capable of speeds in excess of 200 knots.
The United States' S-class submarines, often simply called S-boats, were the first class of submarines with a significant number built to United States Navy designs. Others of this class were built to contractor designs.
USS H-5 (SS-148) was a H-class submarine originally built for the Imperial Russian Navy. Six of these were not delivered pending the outcome of the Russian Revolution of 1917 before being purchased by the United States Navy on 20 May 1918.
USS H-6 (SS-149) was a H-class submarine originally built for the Imperial Russian Navy. Six of these were not delivered pending the outcome of the Russian Revolution of 1917 before being purchased by the United States Navy on 20 May 1918.
USS H-7 (SS-150) was a H-class submarine originally built for the Imperial Russian Navy. Six of these were not delivered pending the outcome of the Russian Revolution of 1917 before being purchased by the United States Navy on 20 May 1918.
USS H-9 (SS-152) was a H-class submarine originally built for the Imperial Russian Navy. Six of these were not delivered pending the outcome of the Russian Revolution of 1917 before being purchased by the United States Navy on 20 May 1918.
USS C-2 (SS-13) was one of five C-class submarines built for the United States Navy in the first decade of the 20th century.
USS C-4 (SS-15) one of five C-class submarines built for the United States Navy in the first decade of the 20th century.
Beginning in ancient times, mankind sought to operate under the water. From simple submersibles to nuclear-powered underwater behemoths, humans have searched for a means to remain safely underwater to gain the advantage in warfare, resulting in the development of the submarine.
The R-class submarines were a class of 12 small British diesel-electric submarines built for the Royal Navy during World War I, and were forerunners of the modern attack submarine, in that they were designed specifically to attack and sink enemy submarines, their battery capacity and hull shape being optimized for underwater performance.
A teardrop hull is a submarine hull design which emphasizes submerged performance over surfaced performance. It was somewhat commonly used in the early stages of submarine development, but was gradually abandoned in the early 20th century in favour of designs optimized for high performance on the surface as a result of changes in operational doctrine. Although naval doctrine changed, design practices remained until the later parts of World War II when the German Kriegsmarine suffered ever-growing losses of submarines in the Battle of the Atlantic.
The United States D-class submarines were a trio of submarines built for the United States Navy in the first decade of the 20th century. All three ships served during World War I providing training for crews and officers on the US East Coast, before the class was decommissioned and sold for scrap in 1922.
SM UC-97 was a German Type UC III minelaying submarine or U-boat in the German Imperial Navy during World War I.
Submarine No.71 was an experimental high-speed submarine built for the Japanese Imperial Navy (IJN) during the 1930s.
The Japanese submarine I-73 was a Kaidai type cruiser submarine of the KD6A sub-class built for the Imperial Japanese Navy (IJN) during the 1930s. One month after participating in the IJN's attack on Pearl Harbor, she was sunk by United States Navy submarine USS Gudgeon.