An incomplete examination by the Sylvia showed it to be a fine navigable passage, but no anchorages were found.
It may possibly be of service to a vessel embayed in Otway Bay, enabling her to run into the strait.
Abra Island, which stands in the center of the eastern entrance, is 300 feet high and covered with vegetation.
A rock with a depth of 1.5 fathoms on it, and well marked with kelp, lies in the fairway of Abra Channel, with center of Maycock Island bearing 305°, distant 0,75 mile, and summit of Francis Island 32°.
Pedro Sarmiento de Gamboa wrote: This article incorporates public domain material from South American Pilot (1916).