| 单词 | time sight |
| 释义 | > as lemmastime sight time sight n. Nautical (now chiefly historical) an observation of the altitude of the sun or a star for the purpose of ascertaining the time and hence the longitude. ΚΠ 1827 B. Hall in W. Galbraith Math. & Astron. Tables ii. 103 I get the apparent times due to the meridian, on which the absolute time sights were taken, with as much accuracy as if the whole..had been taken at the fixed meridian. 1873 Ann. Reg. U. S. Naval Acad. 76 Time sight and azimuth, about 8.30 a.m., Apr. 24. 1932 Pop. Sci. Monthly Feb. 136/2 All deck cadets take a.m. time sight. 2007 J. H. Karl Celestial Navigation in GPS Age vii. 71 The GHA [= Greenwich Hour Angle] of the sun at the time of your LAN [= local apparent noon] is your longitude... Some navigators call this a time sight. < as lemmas |
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