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It is a basic solid submarine that has been used by researchers, salvage divers, [2] and private enthusiasts. [3] A K-250 personal submarine designed and built by George W. Kittredge. This submarine is on display in South Thomaston, Maine, as a memorial to Kittredge. Kittredge Industries began building subs in 1970 at a plant in Warren, Maine. [4]
Those personal submarines which are available for sale cost from US$16,000 to 2+ Billion USD. A wide range of them is available from 1-person to 34+ occupants, some can go just 12 meters underwater and some can even reach to Mariana Trench. [citation needed] Such submarines can be designed from scratch by the builder or built to available plans.
Kittredge Industries was founded in 1970 to design and manufacture midget submarines, completing 49 submersibles before manufacturing was wound down in 1988. [1] Kittredge's designs included the K-250 and K-350, named for their maximum rated depth (in feet); [3] he is known as the "father of personal submersibles". [2]
K. K-250 Submarine; K-Verband; Kairyū-class submarine; UC2 Kraka; L. Losos-class submarine; M. M24 Japanese Midget Submarine wreck site; Yugoslav submarine Mališan ...
I have added several references that demonstrate the notability of this vessel. I think, however, that this page could easily be called "Kittredge Submarine" with info about all three Kittredge models: K250, K350, and K-600. The midget subs page mentions the K-250 and K-350, but there is only a page for K-250.
The first four were renamed K-1 through K-4 on 17 November 1911 as part of a forcewide redesignation of US submarines. USS K-1 (SS-32) (formerly USS Haddock) was laid down on 20 February 1912, launched on 3 September 1913 and commissioned on 17 March 1914. The submarine was decommissioned on 7 March 1923 and scrapped in 1931. [6]
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Submarine 372 suddenly encountered a "cliff" caused by a sudden change in seawater density. Because the seawater density suddenly decreased, the submarine lost its buoyancy and rapidly fell to the seabed more than 3,000 meters deep. The pressure on the submarine increased sharply, and the main engine room pipeline was damaged and water entered.