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In the early 1960s, deployment of rocket-powered ejection seats designed for use at supersonic speeds began in such planes as the Convair F-106 Delta Dart. Six pilots have ejected at speeds exceeding 700 knots (1,300 km/h; 810 mph).
The Germans during World War II used ejection seats some 60 times. Ejection Seats have been used over 12000 times to date. The most common reason for unsuccessful Ejection is delayed Ejection Decision. The Martin-Baker MK 14 seat is microprocessor controlled, with thermal batteries for power.