Navigation. 16th century engraving showing parts of an instrument used for navigating by the stars. The large circle is engraved with compass bearings and dates,against which the smaller components are rotated. By knowing the date and time and the elevation of a known star,the direction or bearing to the star may be determined in areas where magnetic variation makes a compass unreliable. This engraving was first published in The Navigator's Supply by William Barlowe,printed at London in 1597 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Middle Temple Library |
Bildgröße: | 5471 px × 3307 px |
Modell-Rechte: | nicht erforderlich |
Restrictions: | - |