Importance

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Abstract

A watch (2) including a memory (4) and a detection device (6), which device includes an acceleration sensor (8) for measuring an acceleration vector of the watch in a three-dimensional coordinate frame linked to the watch, and an electronic unit (12) that processes measurements supplied by the acceleration sensor. The electronic unit (12) detects, in association with the memory, at least for a rocket of a given type, crossing of the Kármán line by the rocket, solely by means of the watch on board the rocket. Crossing of the Kármán line by the watch is detected by detection device based on periodic measurements carried out by the acceleration sensor from rocket take-off until the crossing of the Kármán line, as defined before the space flight, and based on a corresponding reference value stored in the memory. The Kármán line is defined by a given altitude or a selectable altitude.

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First Claim