Calmus Passage (49°13'N., 126°00'W.) leads E from Brabant Channel and is constricted by Coomes Bank, to the N, by coastal shoals fringing the N side of Vargas Island, to the S. This passage has a least depth of 10m and is divided at its E end by Morfee Island (49°13'N., 125°57'W.). Eugvik Rock, which dries, lies in mid channel, close S of the latter island. A below water rock, marked by a buoy, lies 0.1 mile NW of Eugvik Rock.

Location