Cough, cough, good one. Sorry to burst your bubble, but sailing is far from green. Building the boat and maintaining it cost a lot. Resin, carbon fiber, glass fiber, mylar, aluminium, dyneema, polyester, even dacron and your trampoline are all costing quite a lot in fossil fuels.

It is not a direct use like jet skis or motorboats, but it is far from being neutral impact.

It's depressing really.

Add to that the sailors behavior: I'm doing safety at my sailing club regularly and you won't believe how many water bottle, pieces of line and other rubbish we find on the side of our reservoir all thrown away by sailors as there is no other user of the space...