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Mk 57 anti-submarine mine

Country of Origin: USA


The Mk 57 was an improved submarine-laid, moored U.S. mine for use against high-performance submarines. It had a fiberglass case (unlike the Mk 56, which had a non-magnetic, stainless steel case) and a magnetic firing mechanism.


No longer in service.

Initial operational capability was achieved in 1964.


   Total                   2,059 lb (934 kg)
   Warhead                   340 lb (154 kg)

   Length                  10 ft 8 in (3.25 m)

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