How CYPRES Works

The brilliance of the CYPRES lies in its simplicity. As skydivers enjoy a day of jumping, the device continuously performs real-time calculations of the jumper’s altitude and rate of descent by measuring barometric pressure. If a set of predetermined thresholds are exceeded, CYPRES recognizes the critical situation and cuts the reserve loop, initiating reserve deployment. It sounds simple, but the technology packed into such a small device is an amazing feat of engineering.

Main Components

What Happens When CYPRES is Turned On

The ‘magic’ of the CYPRES device occurs when it is first powered on. The unit makes multiple air pressure measurements during the self-test and takes the average of these calculations to establish the value of ground level.

Even though you may need to reset your altimeter before a jump, CYPRES takes care of itself. This calibration is the basis for CYPRES to recognize the activation altitude and speed relative to ground level. The processing unit contains a factory-programmed microprocessor capable of real-time calculations of a jumper‘s altitude and rate of descent based on barometric pressure. In other words, the CYPRES understands when to cut the reserve loop at the right altitude under the correct conditions (low altitude and high descent speeds).

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