BASE jumping, also sometimes written as B.A.S.E. jumping, is an activity where participants jump from fixed objects, using a parachute to break their fall. "BASE" is an acronym that stands for four categories of fixed objects from which a person can jump: Buildings, Antennas, Spans (bridges), and Earth (cliffs).BASE jumping grew out of skydiving. BASE jumps are generally made from much lower altitudes than skydives, and a BASE jump takes place close to the object serving as the jump platform. Because BASE jumps generally entail slower airspeeds than typical skydives (due to the limited altitude), a BASE jumper rarely achieves terminal velocity. Because higher airspeeds enable jumpers more aerodynamic control of their bodies, as well as more positive and quick parachute openings, the longer the delay, the better.This app offers information, news, photos, videos, and Twitter and Facebook feeds about BASE jumping. There is also a handy link to the Wikipedia BASE jumping page, which offers more detailed information and a history of the sport.This app is not intended to be, nor should it be used as, any form of BASE jump training. The information presented in this app is only for your general use and knowledge. Before attempting any type of BASE jump, you should consult with a trained professional.Keywords: base jump, base jumping, parachutes, parachuting, jumping from buildings, jumping from bridges, jumping from cliffs更多