▁base ▁in ▁hope ▁that ▁another ▁sub marine ▁could ▁capital ize ▁on ▁it . ▁ ▁Gren ad iers ▁fifth ▁war ▁pat rol , ▁under ▁the ▁command ▁of ▁L CD R ▁John ▁All ison ▁Fitz ger ald , ▁between ▁ 1 ▁January ▁and ▁ 2 0 ▁February ▁ 1 9 4 3 , ▁brought ▁her ▁consider ably ▁better ▁fortune ▁than ▁earlier ▁pat rol s . ▁A ▁ 7 5 - ton ▁sch oon er ▁fell ▁victim ▁to ▁her ▁deck ▁guns ▁ 1 0 ▁January , ▁and ▁two ▁days ▁later ▁Gren ad ier ▁sight ed ▁a ▁small ▁tank er ▁with ▁a ▁bar ge ▁in ▁to w . ▁Jud ging ▁the ▁target ▁not ▁worth ▁a ▁tor ped o , ▁she ▁sli pped ▁sil ently ▁into ▁the ▁column ▁behind ▁the ▁two ▁Japanese ▁ships . ▁At ▁d usk ▁she ▁battle ▁sur fac ed . ▁With ▁bin oc ular s ▁l ashed ▁to ▁the ▁deck ▁guns ▁as ▁s ights , ▁she ▁ra ked ▁the ▁tank er ▁and ▁bar ge , ▁s inking ▁them ▁immediately . ▁The ▁remainder ▁of ▁her ▁pat rol , ▁along ▁the ▁Bor neo ▁coast ▁through ▁shall ow ▁and ▁tre acher ous ▁waters , ▁was ▁ham per ed ▁by ▁f ath ometer ▁fail ures . ▁She ▁conducted ▁an ▁ag gress ive ▁attack ▁on ▁two ▁cargo ▁ships ▁ 2 2 ▁January ▁but ▁did ▁not ▁sink ▁them . ▁ ▁The ▁sub marine ▁depart ed ▁Australia ▁on ▁ 2 0 ▁March ▁on ▁her ▁last ▁war ▁pat rol ▁and ▁head ed ▁for ▁the ▁Stra it ▁of ▁Mal ac ca , ▁gateway ▁between