夜间目测及信号导航等级则要求仅用仪表装置来证明你导航的能力。
Night VFR and command instrument ratings (CIR) require you to prove your ability to navigate by instruments only.
从车辆获取道路信息的方式来分类，自动驾驶有视觉导航和磁信号导航。
Vision navigation and magnetic information navigation are two types of automatic driving.
由于射频信号可能会干扰某些电子医疗装置和导航系统，在医院里和飞机上通常禁止使用移动电话。
Mobile phones are often prohibited in hospitals and on airplanes, as the radiofrequency signals may interfere with certain electro-medical devices and navigation systems.
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