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The objective of the program was to define and to demonstrate display formats appropriate for helicopter IFR formation flight. The report describes the human factors analysis which led to the development of three alternative display designs. A program of closed-loop computer simulations is also described in which pilots' performance on the alternative displays was evaluated during simulated IFR formation flights. Evaluations were made of pilot performance under various levels of simulated turbulence, under different levels of pilot workload on a concomitant task and under four conditions of simulated system failures. The results of the study indicate that, within the constraints of the simulation program, manual IFR formation flight is feasible. The comparison of the alternative display formats indicated that the quickened plan-position display format yielded the best performance data under nearly all of the conditions that were tested. A display feasibility analysis was performed which indicated that the technology required to develop the selected display formats is within the present state-of-the-art. (Author)