Weekly Challenge #53: Build a Seaplane!

Build a plane that's also a boat! It must be able to take off from and land safely on water. Primary: Launch an aircraft from the water and land it on the water. Secondary: Build an amphibious seaplane that can also land on a runway. Jeb: Land a seaplane on Laythe's ocean that is able to take off again to explore the planet. Val: Build a seaplane that is also an SSTO vehicle.