ning ▁tower ▁in ▁T ay l ors ▁Bay . ▁The ▁pat rol ▁boats ▁had ▁set ▁their ▁depth ▁charge ▁f uses ▁to ▁, ▁and ▁when ▁Sea ▁M ist ▁passed ▁over ▁where ▁the ▁sub marine ▁had ▁just ▁sub mer ged ▁and ▁dropped ▁a ▁depth ▁charge , ▁she ▁had ▁only ▁five ▁seconds ▁to ▁clear ▁the ▁area . ▁The ▁bl ast ▁dam aged ▁M - 2 1 , ▁which ▁invert ed ▁and ▁rose ▁to ▁the ▁surface ▁before ▁s inking ▁again . ▁Sea ▁M ist ▁dropped ▁a ▁second ▁depth ▁charge , ▁which ▁dam aged ▁one ▁of ▁her ▁two ▁engines ▁in ▁the ▁process ▁and ▁prevent ed ▁her ▁from ▁making ▁further ▁attacks . ▁Ste ady ▁H our ▁and ▁Y ar rom a ▁continued ▁the ▁attack , ▁dro pping ▁sevent een ▁depth ▁charges ▁on ▁believed ▁visual ▁sight ings ▁and ▁instrument ▁contacts ▁of ▁the ▁m idget ▁over ▁the ▁next ▁three ▁and ▁a ▁half ▁hours . ▁At ▁some ▁point ▁during ▁the ▁night , ▁the ▁crew ▁of ▁M - 2 1 ▁killed ▁themselves . ▁ ▁At ▁ 0 4 : 4 0 , ▁H MA S ▁Can ber ra ▁recorded ▁that ▁the ▁Japanese ▁may ▁have ▁fired ▁tor ped o es ▁at ▁her . ▁This ▁may ▁have ▁been ▁one ▁of ▁many ▁false ▁al ar ms ▁throughout ▁the ▁night . ▁However , ▁M - 2 1 ▁had ▁attempted ▁to ▁fire ▁its ▁two ▁tor ped o es , ▁but ▁failed ▁because ▁of ▁damage ▁to ▁the ▁bow ▁either ▁from ▁H MA S ▁Y and ras ▁ram ming ▁or ▁depth ▁charges , ▁or ▁a ▁possible ▁collision ▁with ▁USS ▁Chicago