magnetic compass

基本解释

A cell in the eye may be worth two in the beak, at least when it comes to a migratory bird’s magnetic compass.
鸟的眼睛中的细胞可能会是鸟嘴里细胞价值的两倍，至少当谈到候鸟的磁性罗盘来说是这样。
"They also have a magnetic compass that enables them to navigate thousands of kilometres, even at night, " says Robson.
“它们还有磁性罗盘使它们能够航行成千上万里，即使在晚上。” 罗布森说。
And they made use of a magnetic compass at least a century before the first reference to it appeared elsewhere.
而他们对于指南针的使用比其他地方有史料记载的出现至少早1个世纪。

A compass is a device containing a metal object that points toward the magnetic north pole.

What our man Pascal Brisset did is design a Linux system around a Gumstix Overo Fire computer-on-module, a Vuzix VR920 head-mounted stereoscopic 640 x 480 display (complete with 3D tilt sensor and 3D magnetic compass), WiFi, and Bluetooth modules -- the whole shebang resides in (and on) the eyewear, just the thing for secure telepresence and augmented reality applications (or just extra-private web browsing).
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They moved often, living near Byron Bay, a beachfront community in New South Wales, and on Magnetic Island, a tiny pile of rock that Captain Cook believed had magnetic properties that distorted his compass readings.
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Another added feature is the on-board Magnetic Sensor that lets the user take advantage of downloadable e-Compass apps.
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a compass containing a magnetic needle pivoted in a horizontal plane, that indicates the direction of magnetic north at points on the earth's surface

磁罗经
Based on the gyrocompass technique, the magnetic compass deviation automatic measurement and correction system synthesizes both gyrocompass and magnetic compass technique.
基于电罗经技术的磁罗经自差自动测定和校正系统是一个综合了电罗经和磁罗经技术的自差测定和校正系统。
磁罗盘
磁性罗盘
罗盘仪