ABSTRACT
The advent of unmanned aircraft systems has changed how technology’s role in supporting or replacing functions once solely performed by human pilots is approached. One of the foundational tenets of flight is the responsibility of the pilot to see and safely avoid other aircraft. From the dawn of manned flight, pilots have been expected to maintain vigilance to remain “well clear” from other aircraft. When weather conditions permit, regardless of whether an operation is conducted under instrument flight rules or visual flight rules, vigilance shall be maintained by each person operating an aircraft so as to see and avoid other aircraft. The systems that provide a means of compliance with “see and avoid” and “well clear” are called detect and avoid (DAA) systems. The International Civil Aviation Organization defines DAA as “the capability to see, sense or detect conflicting traffic or other hazards and take the appropriate action”.
