2021 Map of Ketchikan C-6 SE

About this map

Southeast Alaska Acoustic Measurement Facility on Back Island marks a unique intersection of military infrastructure and the maritime wilderness of the Alexander Archipelago. Located within the Tongass National Forest, this coastal environment is defined by a dense cluster of islands including Betton Island, Grant Island, and Hump Island. These landforms create protected waterways such as Clover Passage and Behm Canal. The presence of the North Tongass Highway on the eastern shore provides the primary land link to the mainland, while numerous points and heads, including Betton Head and Indian Point, suggest a landscape shaped by both glacial activity and modern navigation needs. Significant inlets like Moser Bay and Naha Bay further emphasize the complex coastline that has historically supported both indigenous travel and contemporary federal maritime activities.