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Hitler's Lost Sub
400 Years of Subs
Introduction | 1580-1861 | 1861-1900 |1900-1918
1918-1939 | 1939-1945 | 1945-1972 | 1972-2000


1946
Dr. Philip Abelson proposed a marriage of the Walter hull form with a nuclear power plant. The Navy detailed eight engineers to the home of the atomic bomb, the Atomic Energy Commission facility in Oak Ridge, Tennessee, to see what might be developed.

1947
Testing some newly discovered peculiarities concerning the transmission of sound in the open ocean, a U.S. submarine was able to detect a destroyer at a distance of 105 miles and hear depth charges exploding 600 miles away. This, and other research, led to the development of a deep-ocean array of hydrophones called SOSUS (for SOund SUrveillance System). One of the earliest installations could detect a snorkeling submarine at 500 miles.


Loon
Loon on its launching ramp.
1948
The U.S. Navy began experimenting with submarine-launched missiles, starting with a copy of the German V-1 buzz bomb now called Loon. Crew members tracked Loon by radar and command-controlled it from the submarine. Erection of the launching ramp and preparation of the missile kept the submarine on the surface for five minutes, however. The Navy therefore developed a hand-off control system, in which another submarine 80 miles downrange could take over for the missile's final 55 miles of flight.

1950
The Soviet Union moved to regain status as operator of the world's largest submarine fleet. Over the following eight years, they built 235 Whiskey class submarines using the Type XXI as a template.

1950
USS Pickerel, SS-524, ran from Hong Kong to Pearl Harbor—21 days, 5,194 miles—on snorkel.

1950
One of the officers detailed to Oak Ridge in 1946, Captain Hyman Rickover, assumed control of the Navy nuclear propulsion program—and kept control until finally retired in 1982. Rickover was a submariner and an engineer, with a passion for safety and an obsession for control. Brilliant and difficult, he made nuclear power a reality, not just in submarines but in many major surface warships as well.

1952
The first of the post-war U.S. submarines—USS Tang, SS-563—set an American depth record of 713 feet.

USS Grayback, SSG-574
Integrated into the hull, the missile hangar on USS Grayback, SSG-574, could house two Regulus I missiles. When later developments overtook Regulus, the hangar became a compartment for clandestine amphibious assault troops.

1953
The next generation sub-launched missile, Regulus I, could carry a 3,000-pound nuclear warhead for 500 miles.


USS Barbel, SS-580
The Navy applied the Albacore's successful hull form to the last class of U.S. diesel boats, including the USS Barbel, SS-580 (shown here) and to the Skipjack nuclear class, both of 1959.
1953
The U.S. Navy began operation of a fast-submarine test bed (a boat without combat capability but easily reconfigured to try out various control schemes): the 203-foot USS Albacore, AGSS-569. Bearing a hull form resembling that of an airship, the boat went through five experimental configurations. In the first, she demonstrated underwater speeds of 26 knots.

1954
The first nuclear-powered submarine, the USS Nautilus, SSN-571, went to sea. The 323-foot, 3,674-ton boat boasted a speed of 18 knots (surface) and 23 knots (submerged). On her shakedown cruise, she steamed 1,381 miles from New London to San Juan, Puerto Rico, submerged all the way at an average speed of 15 knots. She was so fast that, on her first exercise with an anti-submarine warfare (ASW) force, she outran the homing torpedoes.

Note the use of the term 'steamed.' The nuclear plant finally made a steam-powered submarine practical. The reactor generates heat that turns water into steam to drive the turbine. Two different reactor configurations were proposed. One used pressurized water to transfer heat from the reactor to the steam plant, the other used a liquid sodium potassium alloy.

Nautilus
Nautilus's Walter hull-form ancestry is clear in this 1985 post-retirement photo, shot while the world's first nuclear-powered submarine was on her way to a memorial berth at Groton, Connecticut.

Rickover built one of each. He installed the first in Nautilus, the other in the second nuclear boat, USS Seawolf, SSN-575, where it proved to be difficult to maintain and not as effective as the Nautilus plant. It was replaced a few years later.


X-1
The 49-foot-long X-1 tested a closed-circuit diesel-hydrogen peroxide plant, which exploded in May 1957 and was removed.
1955
The U.S. Navy experimented with various propulsion systems, including so-called closed-circuit engines, which did not require access to atmospheric oxygen. Development of the nuclear power plant tended to put other technologies on the shelf, however, at least in the United States. The development of closed-circuit systems has continued, especially in some European navies seeking a lower-cost alternative to nuclear power.

1955
Based on hard experience with the Japanese kamikaze aircraft, the U.S. Navy developed a prototype nuclear-powered radar-picket submarine. At 447 feet and 5,963 tons, USS Triton, SSN-585 was the largest U.S. submarine to date, but by the time she was in commission in 1959, advances in airborne detection systems had rendered her intended mission unnecessary. In 1969 she became the first nuclear boat to be retired.

V-2
The V-2, a 46-foot-long, 12.46-ton missile fueled by liquid oxygen and alcohol, on a submarine? Well, no.

1956
The German V-2 rocket became the U.S. Air Force Jupiter missile. Although the missile was exceedingly large, at least one scheme proposed mounting four V-2s in a submarine. Timely development of the Polaris missile, which permitted 16 on a boat, precluded any further discussion of submarine-based V-2s.


USS Sam Rayburn, SSBN-635
The USS Sam Rayburn, SSBN-635, one of 41 U.S. ballistic missile submarines built between 1960 and 1968, with its Polaris tube hatches open.
The A-1 Polaris—solid-fuel, compact at 28 feet long, and bearing a range of 1,200 miles—was ready for deployment by 1960. An A-2 version, 1,500 miles in range, entered service in 1962, followed a year later by the 2,500-mile A-3, all of which could fit in the same launch tubes.

1958
The Soviet Union fielded its first nuclear-powered submarine. The Soviets gained a head start by following and copying the Americans. Five years into its program, the Soviet Union had 24 nuclear boats in three classes, all bearing the same reactor. Unfortunately for submarine crews, the Soviets apparently failed to appreciate the hazards associated with nuclear power. Rumors have circulated that entire crews of early Soviet boats later died from radiation poisoning.

1959
The first submarine to utilize the potential of both the nuclear power plant and the high-speed Albacore hull was USS Skipjack, SSN-585, which was officially rated at 29 knots submerged.

USS Triton
The USS Triton, the first submarine to execute a submerged circumnavigation of the Earth.

1960
USS Triton completed the first submerged circumnavigation of the globe: 36,014 miles in 84 days.

1963
On April 10, the USS Thresher, SSN-593 became the first of two nuclear submarines the U.S. Navy has lost to accident (see Submarines, Secrets, and Spies). After two years in commission, the boat had just spent some time in a shipyard and was on sea trials when something went wrong, perhaps the rupture of a section of piping. No one knows for certain. Thresher sank in 8,300 feet of water, taking 128 crew members with her. The boat had an operational depth of 1,300 feet, more than any other U.S. submarine class to that date, but clearly the hull would have passed "crush depth" well before hitting bottom.


Deep Submergence Rescue Vehicle
The Deep Submergence Rescue Vehicle is air-transportable and able to mate with and remove crew from U.S. submarines to a depth of at least 5,000 feet. Two were built; neither has ever been used.
At least two things came out of this accident. First, the Navy carefully reviewed the entire design, looking for any possible defects, and it ordered modifications to all boats of the class then under construction. Second, because the U.S. had no viable method for rescuing trapped submariners at any depth below a few hundred feet, the Navy developed the Deep Submergence Rescue Vehicle (DSRV) to assist any submarine that bottomed short of crush depth.

1965
USS Albacore reportedly set an underwater speed record of 33 knots, though the posted 'official' speed is 25 knots.

1968
On May 22, the USS Scorpion, SSN-589, became the second U.S. nuclear boat lost (see Submarines, Secrets, and Spies). Possibly the victim of one of her own torpedoes, Scorpion in its last moments may have been picked up by the then-secret SOSUS sound arrays planted on the ocean floor.

USS Los Angeles, SSN-688
The USS Los Angeles, SSN-688

1968
A Soviet November class nuclear submarine surprised the U.S. Navy by keeping up with a high-speed task force going 31 knots and led by the nuclear-powered aircraft carrier USS Enterprise. Spooked, the Navy developed a new class of fast attack boats, Los Angeles. The class had some teething problems, but the 62 boats in the class demonstrated respectable performance, with submerged speeds in excess of 30 knots.

1971
The C-3 missile, Poseidon, with multiple independently targeted warheads, went to sea.

Continue: 1972-2000



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