extends SE to Clarence Strait, on SW coast of Etolin I., 28 mi. SW of Wrangell, Alex. Arch.
Named in 1879 by W. H. Dall, U.S. Coast and Geodetic Survey (USC&GS), for Alonzo Tyler Mosman, U.S. Coast and Geodetic Survey (USC&GS), who made surveys in Alaska in 1867.
Abraham Islands, Screen Islands,
Areas:Bars:Bays:Anita Bay, Burnett Inlet, Cooney Cove, Dewey Anchorage, Jadski Cove, Johnson Cove, Kindergarten Bay, King George Bay, McHenry Anchorage, McHenry Inlet, Mosman Inlet, Quiet Harbor, Rocky Bay, Steamer Bay,
Capes:Point Stanhope, Point Harrington, Anita Point, Cannery Point, Gull Point, Isle Point, Kelp Point, Luck Point, Marble Point, Mosman Point, Nemo Point, Ratz Point, Round Point, Steamer Point,
Channels:Clarence Strait, Stikine Strait, Three Way Passage,
Islands:Abraham Islet, Avon Island, Carlton Island, Center Island, Deadman Island, Double Island, Entrance Island, Etolin Island, Etolin Island, Fawn Island, Independence Island, Lincoln Island, Lincoln Rock, Mabel Island, Marsh Island, McHenry Islet, Molver Island, Mosman Island, North Burnett Island, Observation Island, Quartz Rock, Range Island, South Burnett Island, Split Island, Stanhope Island,
Lakes:Burnett Lake, Hatchery Lake, Kunk Lake, Luck Lake, Navy Lake, Olive Lake, Streets Lake,
Mountains:Alice Peak, Baird Peak, Bessie Peak, Helen Peak, Navy Peak, Red Mountain, Steamer Knoll, Virginia Peak,
Pillars:Mountain Ranges:Streams:Eagle Creek, Falls Creek, Kunk Creek, Luck Creek, Porcupine Creek, Trout Creek,