The convoy of MGBs and LCAs set off on the evening of April 19 but after two hours, an LCA took on water and sank. The two crewmen were recovered but two commandos who had manned a Bren gun were lost and after the search was abandoned the force returned to Dover. A second attempt was made on April 21, with a replacement LCA. The Canadian detachment experienced navigational problems and became separated, eventually attracting tracer fire from the shore returned by their accompanying MGBs (Motor Gun Boats). No Canadian troops disembarked. The Commandos landed further north than intended but were unopposed and escaped detection until among the deep sand dunes and wire entanglements. Support fire from the LCSs partially suppressed moderate German tracer fire from the flanks and the commandos were able to progress.