I was speeking of both still and moving water and both one and two people. With one person the added lenght made it very hard to control with fins in the still water (I never used it by myself in the moving water) With two people one person had to be controling the boat with the oars in the moving water. In the still water fins helped to stedy the boat but it was still very dificult to position the boat in the way I would have liked.