Pilot use a hand - hold gps unit to measure their speed over the ground and to report their landing position following xc flights 飞伞者可以使用手持式gps去测量飞行时对地速度及提供越野飞行时降落位置座标。
2.
Cross country ( xc ) - an advanced skill where pilots take advantage of air currents to cover the greatest distance possible over the ground 越野飞行飞行者在空中掌握气流状况优势的先进技术，去突破地表上横跨最远距离的可能。
