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Explanation of tables of plane coordinates
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1a and 7a airway beacon arc-Continued Azimuth from station Bowie cairn Canyon coordinate Plane azimuth description thereof disk in bedrock disk in boulder disk see fig disks in concrete F. G. Johnson feet from station fire lookout tower fork and go G. L. Bean G. L. O. Station go 0.2 mile go south highest point highway hill inches left and go M. W. D. of S. C. Marked by bronze marks are standard mile from station mile to station miles northeast Mountain northwest note 11a Peak Plane azimuth Mark points–Continued ranch reach Reference mark ridge right and go Riverside County rock San Bernardino County San Joaquin County ſº southeast southwest standard reference disks standard station disk station in azimuth Surface and underground take left fork triangulation turn left turn right underground marks water tank