Thought I'd post a picture of my friend's (who passed away) retrieval boat. He too made a buoy to snag his plane. A large 13 1/2' span PBM. The boat is powered by a geared prop drive with two 12 volt gel cell batteries. The hull is a custom (I believe) fiberglass hull. The prop and rudder are enclosed in a heavy screen weed guard. I haven't seen it run but I might end up running it to try it. It is one of the many items in my friend's collection that is for sale. I will start posting more items here on RCU soon.