- A harbour airport, also known as a seaplane base or a water aerodrome, is an airport where seaplanes and amphibious aircraft can take off and land on water instead of traditional runways. These airports are typically located near bodies of water such as rivers, lakes, or coastal areas. Harbour airports provide a valuable transportation option for remote or island communities, as well as areas with limited land resources for building traditional airports. They are also popular for tourism and recreational activities, as seaplanes can offer scenic flights and access to remote destinations.