This design is really quite simple. The trick just to power each of the pistons. It could be made wider but it isn't practical. From what I can tell, it can't break the boat, which makes it ideal. I think it would be possible to redesign it so that a whole pier of them could be stuck side-by-side for more of an ocean front but would take re-spacing the redstone so that it won't interfere with its neighbors. You can replace the redstone torch with a lever as needed (creative mode makes levers hard to use).
This is terrible, you can learn a thing or two from this video. Check the link below.
/watch?v=pFru9JBrY5M
Also, get 1080p, it makes it easier to see the redstone.
xGU5T1x 4 months ago