Prismatic

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Surveying compass in green circular case. Mica card with green rim and MS lettering. Graduated 0-360 degs. This type of compass was invented by Capt. Henry Kater c.1814. The reading of the scale is obtained via an inclined mirror and not a prism.

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Object Details

ID:	NAV0375
Type:	Surveying compass
Display location:	Not on display
Creator:	Jones, Thomas
Date made:	circa 1820
People:	Kater, Henry
Credit:	National Maritime Museum, Greenwich, London
Measurements:	Overall: 25 mm x 163 mm x 132 mm
Parts:	Prismatic Surveying compass case (NAV0375.1)