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Three different electronic displays of instrument approach procedure (IAP) charts were tested in a flight simulator. The first display format emulated existing paper charts. The second added dynamic information of ownship position to the first format. The third contained only tabular information of waypoint names, distance, headings and altitudes. Pilots flew two approaches with each electronic display and two with paper IAP charts. Performance and subjective measures were collected. No significant differences were found on performance measures for the different display conditions. Strong subjective preferences were found for the second display format. The results are discussed in terms of the implications for the design of electronic displays of instrument approach procedure charts.