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 6220-01-089-7185
NSN 5855-00-427-7848
NSN 6610-00-837-3012
NSN 6145-01-441-2630
NSN 6145-01-240-3909
NSN 5835-01-370-4292
NSN 2925-01-614-0476
NSN 2925-01-027-1293
NSN 5990-01-023-3307
NSN 6105-01-443-9547
NSN 6610-00-686-5817
NSN 5975-00-529-3835