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This experiment compares the utility of three off-boresight helmet-mounted display (HMD) symbology information levels for high angle target search and intercept during a simulated air-to-air engagement. The information levels included: Head-Up Display (HUD) presentation of both ownship status and target location, HUD status plus HMD target location, and HUD status plus HMD target location plus HMD ownship status. Four different attitude symbology elements were evaluated within ownship status level. The levels of the information condition variable evolved from the following questions: 1) Will HMD ownship status information help the pilot fly while searching for threats? 2) Will HMD target location information help the pilot find, intercept, and track an airborne target? 3) What is the effect of combining aircraft status and target location information within the HMD? 4) If ownship status information is helpful, are there symbology features which are more interpretable than others? The objective of this research was to determine of ownship status information within the helmet display symbology (HDS) set is necessary in an air-to-air application. The findings suggest that HDS will be advantageous, but task dependent. A strong subjective preference for including ownship status information within the HDS was found.
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