ing ▁Na uru ▁Har bor , ▁she ▁pat rolled ▁the ▁route ▁between ▁Tru k ▁and ▁Na uru ▁for ▁five ▁days ▁without ▁contact . ▁Pet o ▁moved ▁to ▁the ▁Tru k - K av ien g - R aba ul ▁traffic ▁routes ▁on ▁ 2 0 ▁September , ▁and ▁two ▁days ▁later , ▁sight ed ▁five ▁esc orted ▁ships ▁head ed ▁toward ▁R aba ul . ▁She ▁lost ▁her ▁attack ▁chance ▁at ▁the ▁last ▁moment ▁when ▁the ▁enemy ▁made ▁a ▁radical ▁change ▁of ▁course . ▁While ▁Pet o ▁attempted ▁to ▁close ▁for ▁a ▁night ▁attack , ▁an ▁alert ▁esc ort ▁only ▁ ▁away ▁detected ▁her . ▁The ▁enemy ▁ship ▁opened ▁fire ▁on ▁the ▁sub marine , ▁forcing ▁her ▁to ▁crash ▁d ive . ▁ ▁From ▁ 2 4 – 2 6 ▁September , ▁Pet o ▁pat rolled ▁off ▁the ▁Admir alty ▁Islands ▁without ▁contacts . ▁On ▁ 1 ▁October , ▁Pet o ▁sight ed ▁three ▁medium ▁fre igh ters ▁with ▁only ▁one ▁sub - chas er ▁as ▁esc ort , ▁and ▁fired ▁six ▁tor ped o es , ▁hitting ▁two ▁of ▁the ▁ships . ▁Post - war ▁investigation ▁revealed ▁that ▁T one i ▁Mar u ▁and ▁K ink as an ▁Mar u ▁were ▁both ▁s unk . ▁Pet o ▁returned ▁to ▁Br is b ane , ▁Australia ▁on ▁ 2 1 ▁October . ▁ ▁Under way ▁again ▁on ▁ 1 4 ▁November , ▁she ▁fue led ▁at ▁Tul agi , ▁and ▁set ▁out ▁for ▁her ▁pat rol ▁area ▁ 2 4 ▁November . ▁On