1 2 ▁January , ▁she ▁made ▁an ▁un success ful ▁attack ▁on ▁a ▁Japanese ▁supply ▁ship ▁which ▁escaped ▁when ▁Sn apper ▁was ▁forced ▁down ▁by ▁an ▁esc ort ing ▁destroy er . ▁While ▁off ▁Cape ▁San ▁Ag ust in ▁on ▁ 2 4 ▁January , ▁she ▁attacked ▁another ▁supply ▁ship ▁without ▁success , ▁again ▁being ▁forced ▁deep ▁by ▁destroy er ▁esc ort s . ▁On ▁ 1 ▁February , ▁as ▁the ▁sub marine ▁approached ▁Bang ka ▁Stra it , ▁she ▁was ▁detected ▁by ▁an ▁enemy ▁destroy er ▁which ▁made ▁a ▁fruit less ▁depth ▁charge ▁attack . ▁In ▁return , ▁Sn apper ▁fired ▁two ▁tor ped o es ▁but ▁both ▁failed ▁to ▁find ▁the ▁target . ▁Sn apper ▁arrived ▁at ▁So er ab aja , ▁Java , ▁on ▁ 1 0 ▁February ▁and ▁then ▁continued ▁on ▁to ▁F rem ant le , ▁Western ▁Australia . ▁ ▁Sn apper ▁depart ed ▁F rem ant le ▁on ▁ 6 ▁March ▁for ▁the ▁approaches ▁to ▁Tar ak an , ▁Indones ia , ▁and ▁her ▁second ▁war ▁pat rol . ▁F inding ▁no ▁suitable ▁targets ▁there , ▁she ▁was ▁directed ▁to ▁D ava o ▁G ulf ▁where , ▁on ▁ 3 1 ▁March , ▁she ▁closed ▁a ▁large ▁armed ▁tender ▁or ▁auxili ary ▁cru iser . ▁She ▁fired ▁two ▁bow ▁tor ped o es ▁at ▁ ▁and , ▁after ▁revers ing ▁course , ▁came ▁to ▁per is cope ▁depth ▁to ▁observe ▁the ▁enemy ▁ship ▁dead ▁in ▁the ▁water . ▁After ▁firing ▁one ▁tor ped o ▁from ▁her ▁stern