But those tires looked as though they would provide convenient hand- and footholds for clambering aboard, and Sokolov could see no advantage in boarding from the expected direction. So he devoted a few more moments to making his way around to the stern of the boat, half wading and half swimming now, and then approached to the point where he could get a good view of the tire and the loops of rope that he would presently be using to get aboard. Then he drew breath, sank below the surface, and covered the last few meters underwater.