Map Reading Air Force Staff Sgt. Caleb Williams, center, teaches map reading on Kadena Air Base, Japan, April 21, 2017. The 18th Operations Support Squadron provides services such as instruction on properly navigating rough terrain using maps and compasses as part of the preventative aerospace medicine convention. Williams is a survival, evasion, resistance and escape specialist assigned to the 18th Operations Support Squadron. Air Force photo by Airman 1st Class Quay Drawdy SHARE: Download: Full Size (0.69 MB) Tags: Air Force, Airmen Credit: Airman 1st Class Quay Drawdy VIRIN: 170421-F-JZ560-162.JPG Photo Gallery