▁the ▁port ▁with ▁con voy ▁B X - 1 3 6 . ▁Other ▁con vo ys ▁esc orted ▁during ▁the ▁month ▁were ▁H H X - 3 2 0 ▁and ▁ON - 2 7 2 . ▁The ▁latter ▁was ▁badly ▁scattered ▁on ▁the ▁ 2 8 th ▁and ▁ 2 9 th , ▁when ▁it ▁was ▁necessary ▁to ▁he ave ▁to ▁in ▁heavy ▁weather . ▁ ▁One ▁ship , ▁J ama ica ▁Plan ter , ▁was ▁lost ▁from ▁H X - 3 2 0 ▁but ▁this ▁was ▁by ▁collision . ▁W - 2 ▁formed ▁the ▁con voy ' s ▁Local ▁Northern ▁Esc ort . ▁There ▁were ▁also ▁a ▁Local ▁Southern , ▁a ▁Support ▁Group ▁and ▁a ▁Mid - O cean ▁esc ort . ▁ ▁On ▁the ▁ 1 7 th , ▁, ▁a ▁member ▁of ▁the ▁support ▁group ▁for ▁H X - 3 2 0 , ▁picked ▁up ▁an ▁H / F ▁D / F ▁bearing ▁on ▁an ▁enemy ▁sub marine . ▁Border ▁C ities ▁did ▁like wise ▁the ▁following ▁day , ▁as ▁well ▁as ▁ ▁and ▁ ▁of ▁the ▁support ▁group . ▁It ▁was ▁estimated ▁that ▁the ▁transm issions ▁origin ated ▁with ▁a ▁U - bo at ▁some ▁thirty ▁miles ▁away . ▁A ▁few ▁days ▁later - the ▁ 2 6 th ▁and ▁ 3 0 th - ▁when ▁with ▁ON - 2 7 2 , ▁Border ▁C ities ▁reported ▁more ▁record ings ▁of ▁U - bo at ▁transm issions , ▁and ▁again ▁on ▁ 6 ▁January ▁ 1 9 4 5