The weather worsened; several attempts to attach a tow-line to "U-570" were unsuccessful. Believing the Germans were being obstructive, "Burwell's" captain, S.R.J. Woods ordered a machine gunner to fire warning shots, shots that accidentally hit and slightly wounded five of the German crew. With much difficulty, an officer and three sailors from "Kingston Agate" reached the submarine using a Carley float (a liferaft). After a quick search failed to find the U-boat's Enigma machine, they attached a tow line and carried out the transfer of the five wounded men and the submarine's officers to "Kingston Agate". The remaining crew were taken on board HMCS "Niagara", which by this time had come alongside "U-570".