Tongass Narrows is a Y-shaped channel, part of Southeast Alaska's Inside Passage. The waterway forms part of the Alaska Marine Highway and as such, is used by charter, commercial fishing, and recreational vessels, as well as commercial freight barges and tanks, kayaks and passenger ferries. A proposal to build the Gravina Island Bridge across the Tongass Narrows was shelved due to a national-level controversy over the "bridge to nowhere".