Abstract: The DRA's research effort into Visually Coupled Systems is intended to assist the operational pilot fly aggressively at night and day, by giving him an informative view of the near-earth environment. A number of simulator trials have been conducted to explore some of the issues identified in Helmet-Mounted Display symbol set development. The development of successful symbol sets will be iterative. HMD symbol set evaluation techniques are the subject of considerably interest, not only within research establishments. A careful study of the operational requirement should produce a series of tests which will demonstrate compliance; however, we must be cautious, when we are testing the ability of the visionic system to feed cues to a pilot, in how we set out the cues to define the task. International cooperation on VCS research has been formalized through a Memorandum of Understanding with the United States, which defines a 48 months program; considerably effort has been put into achieving an efficient flow of information between its partners. The paper outlines past research, describes the planned future activities and raises some human factors issues which have been identified.!6
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