A free flight obstacle avoidance system (OAS) is a commanded obstacle resolution feedback system. The system employs insertion of hybridized elements to the existing designs of Adaptive Ground Collision Avoidance Systems and Midair Collision Avoidance Systems along with a newly design module, the obstacle...http://www.google.com/patents/US6873269?utm_source=gb-gplus-sharePatent US6873269 - Embedded free flight obstacle avoidance system
