lifesaving 4x50m medley relay - world rescue 2014

The first competitor swims 50m freestyle without fins. The second competitor swims 50m freestyle with fins. The third competitor swims 50m freestyle pulling a rescue tube and after having touched the wall, passes the harness of the rescue tube to to a fourth competitor who wears fins. The third competitor, playing the role of "victim", holds the rescue tube with both hands, while being towed 50m by the fourth competitor to the finish.