▁around , ▁they ▁picked ▁up ▁a ▁west bound ▁con voy ▁and ▁returned ▁with ▁it ▁to ▁Hal if ax ▁or ▁New ▁York . ▁ ▁On ▁ 1 2 ▁August ▁ 1 9 4 4 , ▁Border ▁C ities ▁ste amed ▁to ▁St . ▁Margaret ' s ▁Bay , ▁near ▁Hal if ax , ▁to ▁be ▁taken ▁in ▁hand ▁for ▁H / F ▁D / F ▁cal ibration . ▁On ▁the ▁ 1 9 th , ▁she ▁left ▁Hal if ax ▁and , ▁after ▁some ▁exer cis ing ▁with ▁other ▁ships , ▁proceeded ▁to ▁New ▁York ▁where ▁she , ▁in ▁company ▁with ▁her ▁group , ▁picked ▁up ▁her ▁first ▁con voy , ▁H X F - 3 0 5 . ▁It ▁was ▁accompanied ▁to ▁HO MP , ▁a ▁position ▁fixed ▁according ▁to ▁the ▁individual ▁con voy , ▁where ▁Western ▁Esc ort ▁groups ▁from ▁the ▁south ▁were ▁rel ieved ▁by ▁others ▁from ▁the ▁north ▁or ▁vice ▁vers a . ▁On ▁this ▁occasion , ▁W - 2 ▁was ▁rel ieved ▁by ▁W - 3 ▁and ▁then ▁returned ▁to ▁Hal if ax . ▁ ▁H X F - 3 0 5 ▁was ▁later ▁turned ▁over ▁to ▁the ▁mid - o cean ▁group , ▁C - 5 , ▁. ▁On ▁ 8 ▁September , ▁it ▁was ▁attacked ▁by ▁U - bo ats , ▁which ▁s ank , ▁with ▁heavy ▁loss ▁of ▁life , ▁a ▁large ▁British ▁tank er , ▁SS ▁Empire ▁Heritage , ▁and , ▁a ▁half ▁hour ▁later , ▁a ▁rescue ▁ship , ▁HMS ▁P into , ▁who