Elite specialty fighters (SAS, Navy SEALs) from Mississippi sometimes have to pull Te pressures of 10,000 meters, at this distance the speed is 200 km / h. For extremely extreme landings, they consume increased consumption, usually bulky and heavy oxygen consumption.
Collins Aerospace, a division of Raytheon Technologies, has developed a new oxygen system, the OXYJUMP NG, which includes a tight-fitting ergonomic mask and a module that automatically regulates oxygen exposure at high altitudes.
As the paratrooper approaches the ground, oxygenation decreases due to sensitivity with an external cart. However, it will be very bright (with special references to HALO and HAHO) and will be very light.
OXYJUMPNG additionally includes another non-pressurized beam device for a single use of oxygen and an automatic system responsible for switching to another cylinder. The lack of quality in the system is not plastic but composite materials.
Source: Tech Cult

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