Sinking Japanese_submarine_I-12

i-12 sunk minesweeper ardent , uscg cutter rockford on 13 november 1944, 10 days after sinking of ss john a. johnson, near kauai in hawaiian islands.

the ardent , frigate rockford escorting six-ship convoy midway between honolulu , united states. @ 12:32, ardent s sonar picked submarine contact. ardent attacked first @ 12:41, firing 24-charge hedgehog pattern, , again @ 12:46 second hedgehog pattern. rockford left escort station assist, , fired first barrage of rockets hedgehog @ 13:08; 2 explosions followed, before underwater detonation rocked ship. ardent carried out 2 more attacks , frigate dropped 13 depth charges administer coup de grace. resulting explosions caused loss of contact i-12.

wreckage recovered on scene—deck planks, ground cork covered diesel oil, wooden slat vegetable crate japanese writing , advertisements on it, pieces of varnished mahogany inscribed in japanese, , piece of deck planking containing japanese builders inscriptions—indicated definite kill .