Survey Equipment needed to pinpoint the location of cables related to a weapons system. The United States Air Force (USAF) has a requirement to limit land survey equipment procurements to Trimble Inc ... Survey Equipment needed to pinpoint the location of cables related to a weapons system. The United States Air Force (USAF) has a requirement to limit land survey equipment procurements to Trimble Inc brand equipment, software, and training in order to complete a technical refresh of existing CONUS/OCONUS equipment and all Unit Type Code (UTC) kits over the next seven years.