Photo: NAH-000248 and NH 081916
Caption: Consolidated PBY-1 Catalina, BuNo 0125. View taken over Alaska, circa 1937. Yarnell Collection, 1975. "US Naval Historical Center Photograph - Released"
About 2/3 of a plane length ahead of the PBY is the profile of a mountain sloping diagonally down into a body of water. That may be the same mountain behind the PBY's tail in the next photo.
(Photo courtesy of the Naval Historical Center, US Navy)