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航海象限仪
Portuguese Maritime ExplorationsMarine SextantNautical QuadrantLongitude Calculation DeviceA Portuguese CaravelModel of the Slave Ship VigilanteSaint Anthony as Military CaptainBahian Sailing CanoeBoat from the RecôncavoPortuguese Carrack São GabrielView from the Farol da Barra

航海象限仪

这件复制品(15世纪)展示了一种四分之一圆形的象限仪,刻度从 0° 到 90°。它用于测量星体高度以确定纬度航行,不依赖可见地平线——这对在海上的航海者是一大优势。它体现了早期欧洲航海科学的巧思与智慧。
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