between Simeonof and Little Koniuji Is., in Shumagin Is., Aleutian Range
HistoryNamed by fishermen for its depth; surveyed in 1872 by W. H. Dall, U.S. Coast and Geodetic Survey (USC&GS).
Flying Eagle Harbor, Northeast Harbor, Northwest Harbor, Sandy Cove, Shoal Bay, Simeonof Harbor, Yukon Harbor,
Capes:Channels:Koniuji Strait, Twelve Fathom Strait,
Islands:Atkins Island, Big Koniuji Island, Chernabura Island, Hall Island, Herendeen Island, Little Koniuji Island, Murie Islets, Murre Rocks,