单词	gyrocompass
释义	gyrocompass /ˈdʒʌɪrə(ʊ)kʌmpəs / noun A non-magnetic compass in which the direction of true north is maintained by a continuously driven gyroscope whose axis is parallel to the earth’s axis of rotation.Unlike a conventional gyrocompass that typically must operate for an hour or more before it can provide useful information, the GPS compass is usually ready for use in less than five minutes.... When it reached its target, a gyrocompass and timing device in the rear sent it into a steep, spinning, near-vertical dive which stalled the engine. A commercial GPS attitude-determination system and a gyrocompass served as reference systems during some tests; surprisingly, the gyrocompass performed quite well at such high latitudes, although settling took many hours.
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