The final version of the CPI developed into a wing-shaped structure. Here a cut-away resting on a pedestal shows the different components, all in one neat package. (Photo: NAE)
Almost 25 years of effort at NRC's National Aeronautical Establishment (NAE), has resulted in the design of a unique system for locating a downed plane, its passengers and the flight recorder. Called the Crash Position Indicator (CPI), this brainchild of Harry Stevinson, an engineer with NAE's Flight Research Laboratory, is being manufactured and marketed by the Avionics Division of Leigh Instruments Ltd., at Carleton Place, Ontario.
CPI - The Crash Position Indicator