An item designed to count the number of ships passing over an underwater mine. It is set to allow detonation after a predetermined number of ships have passed.
Classification: Parts for bombs, grenades, torpedos, mines, and similar munitions of war
NSN 6685-01-279-6300
NSN 6130-01-640-7967
NSN 4140-00-466-9268
NSN 5915-01-417-3120
NSN 5905-01-165-3831
NSN 5855-00-494-9581
NSN 6685-01-395-2057
NSN 5920-01-228-6830
NSN 6610-01-343-2609
NSN 4140-01-096-5722
NSN 6240-00-578-7894
NSN 5996-01-406-4035