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.