Synthetic Vision Systems (SVS) create images for display in the cockpit from the information contained in databases of
terrain, obstacles and cultural features like runways and taxiways, and the known own-ship position in space. Displays
are rendered egocentrically, from the point of view of the pilot. Certified synthetic vision systems, however, do not yet
qualify for operational credit in any domain, other than to provide enhanced situation awareness. It is not known at this
time whether the information provided by the system is sufficiently robust to substitute for natural vision in a specific
application. In this paper an operations concept is described for the use of SVS information during a precision instrument
approach in lieu of visual contact with a runway approach light system. It proposes an operation within the existing
framework of regulations, and identifies specific areas that may require additional research data to support certification
of the proposed operational credit. The larger purpose is to set out an example application and intended function which
will require the elaboration and resolution of operational and human performance concerns. To this end, issues in several
categories are identified.
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