Instituted April 14, 1919.
Awarded to NCO sailors who passed tests in mines and mine placement.
Test subjects included schematics of mines, weather, ocean surface, and knowing what parts of the ship are best to damage.
(Please correct any errors or add any missing information)
.................
Awarded to NCO sailors who passed tests in mines and mine placement.
Test subjects included schematics of mines, weather, ocean surface, and knowing what parts of the ship are best to damage.
(Please correct any errors or add any missing information)
.................
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