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 6685-01-423-1454
NSN 5990-01-238-1975
NSN 6240-01-381-6815
NSN 5855-01-559-9639
NSN 5895-01-093-1007
NSN 6105-01-285-3015
NSN 6645-01-202-4674
NSN 6650-01-542-0683
NSN 5835-00-740-0246
NSN 5975-00-022-4457
NSN 5999-01-056-9543
NSN 5915-01-527-2088