The perimeter is not an immediate drop-off into the lake/river/sea, but rather a series of guarded perimeter pads which slope into the water, so you can wade into the water without officially being off the course. (Reduces liability and chances of drowning deaths.)

Wave action is reduced by the steadiness offered by interlocking many platforms together, but assuming some buoyance effects would occur, the edge of each play area is slightly rounded up to avoid huge numbers of annoying "wall shots". Also, the holes could be designed to account for a little movement, so rather than large flat areas, there are series of slight hills and valleys you aim for, retaining an aspect of strategy.

Also sells ice cream cones and booze, at a hugely inflated price for water recreationists.