ing ▁on ▁ 2 9 ▁March . ▁ ▁On ▁ 2 8 ▁April , ▁Pet o ▁and ▁, ▁along ▁with ▁an ▁esc ort , ▁sa iled ▁for ▁her ▁pat rol ▁area ▁south ▁of ▁Form osa . ▁She ▁sa iled ▁from ▁Mid way ▁on ▁ 2 ▁May , ▁with ▁Per ch ▁and ▁ ▁joining ▁the ▁w olf ▁pack . ▁Ar riv ing ▁in ▁her ▁area , ▁Pet o ▁began ▁looking ▁for ▁sh ipping ▁worthy ▁of ▁her ▁tor ped o es . ▁Only ▁six ▁ship ▁contacts ▁were ▁made ▁during ▁the ▁entire ▁pat rol ▁and ▁a ▁favor able ▁attack ▁position ▁could ▁not ▁be ▁obtained ▁on ▁any ▁due ▁to ▁aircraft ▁in ▁the ▁vic inity ▁or ▁shall ow ▁water . ▁She ▁returned ▁to ▁Mid way ▁on ▁ 1 5 ▁June ▁and ▁later ▁that ▁day ▁sa iled ▁for ▁Pear l ▁Har bor ▁with ▁, ▁arriv ing ▁on ▁ 1 9 ▁June . ▁On ▁ 2 1 ▁June , ▁she ▁sa iled ▁on ▁for ▁San ▁Francisco , ▁California , ▁for ▁major ▁alter ations ▁at ▁the ▁Beth le hem ▁Ste el ▁Company ▁yards . ▁ ▁On ▁ 2 9 ▁September , ▁Pet o ▁sa iled ▁west ward ▁again , ▁reached ▁Pear l ▁Har bor ▁on ▁ 7 ▁October , ▁and ▁arrived ▁Mid way ▁Island ▁on ▁ 2 7 ▁October , ▁where ▁she ▁joined ▁ ▁and ▁. ▁Task ▁Group ▁ 1 7 . 1 3 ▁arrived ▁in ▁their ▁assigned ▁area ▁in ▁the ▁Y ellow ▁Sea ▁ 9 ▁November . ▁ ▁On ▁ 1 2 ▁November , ▁Pet o ▁heard ▁a ▁loud ▁explos