Instrument meteorological conditions (IMC) is an aviation flight category that describes weather conditions that require pilots to fly primarily by reference to instruments, and therefore under instrument flight rules (IFR), rather than by outside visual references under visual flight rules (VFR). Typically, this means flying in cloudy or bad weather. Pilots sometimes train to fly in these conditions with the aid of products like Foggles, specialized glasses that restrict outside vision, forcing the student to rely on instrument indications only.
因为主要是练习，所以special use airspace我都没去管。现在我主要是集中在训练飞各种程序上。flight planning的问题得之后再学习一下才能搞懂。
SUA的问题可以参考一下http://www.pilotworkshop.com/tips/special_use_airspace.htm。Pilotedge也有个相关的workshop。我的理解是ifr的话并不用特别担心，因为atc应该会注意让你不要闯到什么不该去的地方的。vfr的话确实是自己要小心。
雷达卡
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
千斤顶
照妖镜
已绑定手机
话说你是用什么录的视频？
