RIB Dingy with aluminum bottom
We sailed this winter with friends on their boat in Mexico, who had a Force 4 RIB from New Zealand. The Force 4 dinghy uses a system where the tubes are attached to the aluminum hull with bolt rope like sections that slide into matching slots in the hull. This allows the tubes to be completely removed for storage or replacement. Force 4 dinghies are hard to find in North America. You can get them at www.discount-marine.co.nz/ who sell in US$ and will ship. It motored fine and rowed decently except the oars were way too short (as is typical of inflatables).