A US Navy beachmaster directed the loading of light and medium tanks of the US Army Assault Training Center.  On an incoming tide, Mark-6 LCTs (Landing Craft, Tank) took aboard the cargo, which would assault the beach at Woolacombe, England a few miles away.  Because this beach was flat, the landing craft grounded some distance out.  The tanks were waterproofed so that they could wade the intervening water.  Their machinery was sealed in asbestos compound and the big vents elevate air intakes enough so that the tanks could enter water as much as six feet deep and still operate.