1930s United States patrol aircraft

maritime patrol flying boat family

1938 multi-role military aircraft family

1939 maritime patrol flying boat by the Glenn L. Martin Company

1937 maritime patrol flying boat family by the Consolidated Aircraft Corporation

1940 military floatplane by Northrop

1939 prototype patrol flying boat model by Consolidated Aircraft

1938 blimp family by Goodyear

prototype flying boat series

1932 prototype flying boat model by Hall