This document is the Architecture Description (AD) for the SAE Unmanned Systems (UxS) Control Segment (UCS) Architecture. This AD serves as the official designation of the UCS Architecture - SAE AS6512. The UCS Architecture is expressed by a library of SAE publications as referenced herein. The other publications in the UCS Architecture Library are: AS6513, AIR6514, AIR6515, AIR6516, AIR6517, AS6518, AIR6519, AIR6520, AIR6521, and AS6522.