Simplify the following text for a Grade 8 native English-speaking person.
Original: The Grumman G-21 Goose amphibious aircraft was designed as an eight-seat `` commuter '' plane for businessmen in the Long Island area .
Simplified: The Grumman G-21 Goose is an amphibious aircraft , which means it can land and take off on water . It was designed as an eight-seat `` commuter '' plane for businessmen in the Long Island area .