between Unalaska and Sedanka Islands., Aleutian Islands.
Aleut name published by Lieutenant Sarichev (1826, map 14), Imperial Russian Navy (IRN), as "Proliv Udagakh" or "Udagakh Strait." It was later called "Oudagakh" by Captain Lutke (1836, p. 284), Imperial Russian Navy (IRN), and then "Proliv Spirkin" or "Spirkin Strait" by Captain Tebenkov (1852, map 26), Imperial Russian Navy (IRN). According to R. H. Geoghegan, the name may have been taken from the Aleut word "idakuk" which means "leaves, passes away, emanates from."
Agamgik Bay, Agiisax, Amugul Bay, Beaver Inlet, Constantine Bay, Deep Bay, English Bay, Hive Bay, Idilmaagim Naga, Iliuliuk Bay, Morris Cove, Sisek Cove, Small Bay, Strait Bay, Summer Bay, Tanaskan Bay, Udagak Bay, Udamat Bay, Ugadaga Bay, Ulalux, Uniktali Bay,