M-class submarine

As M- class submarine several types of several navies are referred to:

To the M- class of the U.S. Navy was a single U- boat which was used 1914-1922, see USS M-1
To the M- class of the Royal Navy were three submarines which were used 1918-1932, see submarine class M ( Royal Navy )
To the M- class of Soviet naval fleet included 96 submarines between 1934 and the 1960s were used, see Maljutka class

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