Prismatic

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.

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
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