Profile: Martin-Baker Aircraft Co., Ltd. manufactures ejection seats and related equipment to safeguard the aviator throughout the escape, survival, location, and recovery phases. Our crash attenuating troop seat system (CATSS) is a proven, long stroking crashworthy seat employed in military helicopters. It's design permits a vertical seat stroke of nearly 12 inches. Although only 10-20 percent of that stroke's capacity stroke was seen in tests, the seat did demonstrate significant mitigation of shock producing DRI numbers below the 17.7 limit. This indicates that the degree of shock mitigation is proportional to the amount of displacement opposite the impulse direction. Contrary results were expected regarding the vertical excursion of the seat, since the more severe 8 M/S test was expected to exceed the seat's stroke limit. However, the high rate loading characteristics of mine engagements indicate that the strain rate in a metal-deforming energy absorber must be dependent on the duration of the input.