When switched on, the Vigil® performs a complete self test to check all internal parameters and calibrates itself at the atmospheric pressure of the DZ altitude.
When the “” logo appears, the Vigil® is ready to go with you on the plane. The Vigil® is now ready for use and is in a “stand-by” status (recalibrating itself every 32 secs). During taking off the Vigil® will go to an“active” status from 150 ft / 46m in a time of max. 32sec. From that moment on, your Guardian Angel is ready to help you in critical situations, by mesuring and calculating 8 times per sec its position.
EU Patent N° EP 1084950B1
US Patent N° US 6,378,808B1
Once the door opens and you leave the plane, the Vigil® will calculate the time left over before reaching the activation altitude (for example: 840 ft in PRO mode), by measuring continuously your falling speed and your altitude. The Vigil® takes in consideration the speed variation during the free fall and recalculates every 1/8 of a second the time left to reach the activation altitude. When you reach the activation altitude (time = 0) and if you still fall at a speed above 35m/sec, the Vigil® will activate instantaneously the cutter to allow your reserve parachute to deploy. This patented method give a very accurate activation altitude (+/- 60 feet).
Vigil® works by permanent recalculation of the time left before activation (see patent).
The Vigil II has been designed to resist to a water immersion of 0.5 meter for at least 30 minutes (I.P.67).
The Vigil® doesn't need any filter replacement, it has a built-in stainless steel air filter and after water contact no filter has to be changed.