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Dip Needle or Dipping Needle, 1905
Britse Admiraliteit, London
Maker:
Collectie:
NavigArte
A dip needle resembles a conventional compass, but instead of being held horizontally, the needle is mounted vertically. It is a magnetic instrument used primarily for scientific and polar navigation near the North and South Poles.
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Dip-needle compass, unsigned, with silvered scale swivel-mounted in wooden chamber with bevelled glass panels, bubble level and adjustable feet – 10½in. (26.5cm.) high
Dip circles (also dip needles) are used to measure the angle between the horizon and the Earth's magnetic field (the dip angle). They were used in surveying, mining and prospecting as well as for the demonstration and study of magnetism.
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