The hardest for Russia the First world war, followed by even more destructive for the country’s civil war, rejected the Navy powers for many years. The winning “red” had to use the pieces of the former “Imperial” power. This was the case with the submarines. In the 1920-ies in the system was gradually introduced surviving pre-war units, and not always the best. Rather, the best preserved, which can be put into service without a Herculean effort and cost. As for the future, the legacy remained a motley bunch of projects for the development of domestic “leopards” overseas “Holland” and “products” of the Italian Laurent, who were in very different stages of development. An important problem was that the cut for several years by the global military-technical thought Soviet Russia could not make good use of the experience gained in the development and operation of submarines in other countries during world war II.
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