海滨博物馆拥有一系列非常古老的古代导航仪器。其中包括勘探画廊,象限,交叉员工,背部员工,八圈和六格子中的Astrolabes。可以在中找到更加原始的Kama'l的再现勘探画廊的年龄,它是最早的设备之一,以估计地平线上方天体的高度。该观察将古人放在同一轨道上,我们“现代”导航员使用 - 直到卫星,计算机和GPS为天体导航的令人满意和优雅的艺术。
The earliest astronomers through painstaking and detailed observations and record-keeping recognized that the stars seemed to rotate about a single star in the heavens, Polaris, in the constellation Ursa Minor. The ancients eventually realized that the angular elevation (altitude) of Polaris above the horizon corresponded almost exactly with the latitude on the earth from which the altitude measurement was made. From the altitude of Polaris, and a few corrections the Latitude can be easily calculated. (Corrections are necessary since Polaris is not exactly due north, in fact, because of precession of the earth’s axis, Polaris was not always and will not always be the North Star. Around 14,000 CE, the star Vega will be in that position for 500 or 1000 years.)阅读更多
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