NOTE: The Ketchikan Airport Ferry operates between the Airport on Gravina Island and the Airport Ferry Terminal in Ketchikan. Since this operation is similar to intra-airport shuttle bus systems, both docks are considered to be part of the airport, and thus both are considered to be served by the airplanes (Ketchikan Airport) and the transit buses (Airport Ferry Terminal). For a more detailed explanation, see the Technical Reprot on Intermodal Passenger Connectivity Database criteria, being issued in February 2009.
SOURCE: Intermodal Passenger Connectivity Database, U. S. Department of Transportation, Research and Innovative Technology Administration, Bureau of Transportation Statistics as of December 2008.