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This document sets forth design and operational recommendations concerning the human factors issues and criteria for airborne terrain separation assurance systems. The visual and aural characteristics are covered for both the alerting components and terrain depiction/situation components. The display system may contain any one or a combination of these components. Although the system functionality assumed for this document exemplifies commercial aircraft implementation, the recommendations do not exclude other fixed wing aircraft types. Because of their unique operations with respect to terrain, rotorcraft will be addressed in a separate document.

Although this document is specifically intended for the application of color to cathode-ray-tube (CRT) instrumentation, most portions are also compatible with other emerging electronic display technologies, whether they are self-luminous or light modulating devices, such as liquid crystal displays. However, it is not intended to address the concerns brought about by the use of specialized equipment such as head-up displays and night vision goggles. Identifiable incompatibilities or special considerations for color display technologies other than the CRT have been noted in the recommendations.

This document sets forth functional, procedural, and design criteria and recommendations concerning human engineering of data link systems. For the most part, the recommendations are based on evidence from empirical and analytic studies of data link communication, and on experience from operational tests, and actual use of data link. Because the recommendations deal only with the available research, they are not comprehensive; data are not yet available to support recommendations on all potentially critical human engineering issues. Citations for the supporting research are embedded within the recommendations and a full list of references appears in Section 2 of this document.