How booking on Goon Boat works
Pick a boat and send the request from its listing page: the form asks for your dates and for the questions you have. It reaches the Goon Boat team, who check the boat and those dates with the operator that runs it.
The answer comes back by email before anything is paid — the price for your dates, the port you meet in and the time, and the deposit and cancellation terms that apply to that particular boat. The booking goes ahead once you agree to them.
Every boat is offered by the operator who runs it, so the equipment, the area you are allowed to sail in and any licence requirement are written into the listing text. If the page does not answer something you need to know, ask from that same page: the question lands in the same inbox.