RTCA DO-208 1991 Edition, July 12, 1991
MINIMUM OPERATIONAL PERFORMANCE STANDARDS FOR AIRBORNE SUPPLEMENTAL NAVIGATION EQUIPMENT USING GLOBAL POSITIONING SYSTEM (GPS)
Includes all amendments and changes through Change 1, March 16, 1995
Published By:RTCA, Inc. (RTCA)
Sets forth the operational goals and applications, and recommends standards and test procedures for airborne supplementary navigation equipment (2D and 3D) using Global Positioning System (GPS) inputs in the en route, terminal, and approach modes or any combination thereof. A supplemental navigation system may be used as a primary navigation reference in an aircraft when an approved and operational sole means navigation system is available. The report defines performance, functions, and features for 2D airborne equipment, which performs only lateral guidance, and 3D equipment, which performs both lateral and vertical guidance. FAA Technical Standard Order (TSO) – C129a references this document.