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 and 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
