Island Airport

The airport was buildt by Dad during his time stranded on a Deserted Island.

Background
After Timmy told Dad a bomb was about to explode and he was the only one able to save them Dad thought of driving the plane of the airport he buildt but quickly dropped the idea as he doesn't know how to fly. Then he thought of building a flight school, but Timmy told him to focus, and he decided to use the submarine he built on his spare time.