Nothing is impossible on Berlin waters. Did you know that in Germany only Berlin requires a patent for sailing boats? In this case it is for a reason: Very fast yachts, and smaller boats, motorboats, sups, pedalboats, kajaks and 8-person rowing boats use the same piece of water at the same time. Knowing the rules, if anyone on the water(except ferries and inland vessels) has to give you the right of way. The two main rules for sailing : 1. If you are on the same tack as the other boat, the leeward boat has the way of right. 2. If you are not on the same tack as the other boat, the boat, that gets the wind from the starboard side has the right of way. Regattas have additional rules, of course. We had no collision with any other boat so far, but several near-accidents. Your wallet is safe on board as you. But lives matter more than tangible assets, and in a real situation your life is worth more than your wallet. ;) You're welcome aboard: N 52.435° - E 13.166°