Perimeter Patrols: 9th SFS provides base security on UTVs Published Dec. 14, 2018 By Airman 1st Class Tristan D. Viglianco 9th Reconnaissance Wing Public Affairs BEALE AIR FORCE BASE. Calif. -- The 9th Security Forces Squadron from Beale Air Force base conducts patrols of the base’s 26-mile perimeter on utility terrain vehicles (UTV) to help ensure the base is secure. They conduct at least three patrols every day. During the patrols they check for damage to the fence or any other signs of tampering. The off-road nature of the UTVs allows them to move over obstacles and go through water.