I'm thinking about installing a course in a river where state law would require me to float it and sink it with/after each use.
Instead of pulling up the course and clicking buoys on/off each time, I'd like to try attaching the buoys with magnets. The thought is that I'd have a sub buoy with a magnet approx. 5 feet down, and another magnet dangling on 5 feet of rope attached to the buoy. To install I'd just float up next to the sub buoy (which would have a large, bright-colored disc attached underneath it for visibility) and drop the magnet on the buoy down and the two would connect. To remove after skiing it would be a easy tug.
Anyone else ever try this? Is it doable? Any thoughts (besides mockery)?
PS: No, I have no idea how heavy magnets are and how large they would have to be to keep buoys in place. Feel free to enlighten me.