The existence of this strait was first noted by a Russian expedition under Fabian Gottlieb von Bellingshausen in 1820.
[1] The north entry is between Beach Point, the northeast extremity of Morrell Island (Thule Island), and Tilbrook Point, the northwest extremity of Cook Island.
The south entry is narrower, and between Hewison Point and Reef Point, which are 3000 meters apart, with navigation east of Twitcher Rock.
This article incorporates public domain material from "Douglas Strait".
Geographic Names Information System.