I can't help agreeing with Adrian. The problem is often about mooring technique and not the speed of the passing boats through the water. Many canals were originally designed (redesigned) for speeds far in excess of those we use today. I get fed up with idiots who have moored their boats so badly that they bangs and crash against chains fitted at right angles to piling as I pass at tick over. If the owners get soaked with hot liquids it is there own fault in my opinion. If you want to learn how to tie a boat up correctly have a look in the BW Boaters Handbook (other books are available). Use good rope not chain, look where you are moored, don't hide in trees on the inside of a bend where others can't see you and finally, use a spring, it stops the worst of the surge if a boat does happen go passed too fast.
Paul Good boating is about being considerate to others that includes thinking about where and how we are moored. >
