The site was used as a triangulation station and observation site. Devil's Slide was one of a series of observation posts during pre-radar days and was a part of the Harbor Defense of San Francisco. Military personnel would use binoculars and compasses to search for ships at sea and relay the coordinates, by phone, to a central post or gun emplacement, in an effort to locate the ship's position by triangulation using information received from other observation posts. Improvements to the site included three observation pill-boxes, one electric generator bunker, one communications and command bunker, and an observation tower. The site is currently privately owned.
If you would like more information regarding the former Devil's Slide, please select a link from above.
