Yachts could turn into submarines
Boats could be impossible to capsize
Whales / wildlife could be prevented from being struck by ships
Sailing could be on ancient Polynesian voyaging canoes
Ferries could be electric / fly
Search and rescue expertise could be improved in the Coast Guard
Boats could have hot tubs and/or spas
Art could float
Boats could be shaped like different objects
Marine cloud brightening could save coral reefs and reflect solar radiation
Wetsuits could enhance survival in surfing / open water
Restaurants / bars could float and cruise around
Boat renters could have a license
Cargo ships / cruises could have sails or use hydrogen / solar power
Volunteers could rescue people in natural disasters
