Dab tsi yog qhov feem ntau ntawm Cov Nqaij Phom Saum
Aug 30, 2017| Sib ntsev compass yog kev coj ua ntawm kev coj ua, ntsuas qhov orientation orientation.
1, sib nqus compass, kuj hu ua "magnetic compass", yog kev ntsuas kev ntsuas ntawm qhov ntsuas qhov ntsuas, siv los txiav txim siab txog kev taw qhia thiab kev tsom teeb pom kev zoo. Nws yog nyob rau hauv Tuam Tshoj tus Secretarys South, compass raws li kev nce qib. Nws yog kev siv cov khoom sib nqus ntawm lub cev los ntawm geomagnetic stability ntawm sab qaum teb ntawm kev coj ntawm kev coj ua ntawm kev ntsuas ntawm qhov ntsuas.
2, qhov sib txawv ntawm cov hlau nplaum yog tsim los ntawm ntau tus qauv ntawm cov hlau nplaum, kev hu thiab qhov sib nqus yuam kev kho, lub nqus koob ntim rau sab nraum qab ntawm tus xov tooj, dag zog hauv cov hlau nplaum, kom ob qho tag nrho ntawm qhov sib nqus rab koob taw rau sab qaum teb thiab sab qab teb sab qaum teb, lub hom phiaj. Ntau zaus siv navigation rau nkoj thiab dav hlau.
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