What must be grasped accurately before skydiving?

1956 and 65438+February, when troops parachuted on the plateau, the air was thin, the climate changed greatly, and the temperature was low, which caused a lot of interference to the parachuting, and had a certain impact on the breathing and parachuting operation of parachutists.

Therefore, before skydiving, we must accurately grasp the weather changes, learn the climate characteristics and general protection knowledge in plateau areas, learn to use oxygen equipment, and strengthen rescue work.