Seymour Canal is an inlet penetrating deep into the southeastern part of Admiralty Island, Southeast Alaska, United States. [1] The inlet was first charted in 1794 by Joseph Whidbey, master of HMS Discovery during George Vancouver's 1791–95 expedition. Vancouver later named it "Seymour's Channel". [2] Two large islands are located within it: Swan Island to the north, and Tiedeman Island just to its south.
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