The Military Aircraft Collision Avoidance Warning System (MACAWS) is a highly advanced military airborne system using proven technologies to give timely warning of potential collisions and improve aircrews situational aw......The Military Aircraft Collision Avoidance Warning System (MACAWS) is a highly advanced military airborne system using proven technologies to give timely warning of potential collisions and improve aircrews situational awareness. Specifically intended for low altitude operations, MACAWS achieves low false alarm rate through the use of special algorithms which minimise multipath reflection effects.