Boat Sextant

The sextant has a grey plastic (Makrolon) plate, plastic handle and a stiffening bar at the back. The aluminium micrometer drum and clamp are located on the back of the index arm. The instrument has three green shades and two green horizon shades. The index and horizon glass are fitted with adjustment screws by an Allen key. The telescope is 79 mm in length with an erect image. It is attached to the frame by a plastic clip. Accompanying the instrument is an Allen key.

The instrument has a plastic scale from -20° to 120° by 1°, measuring to 120°. Micrometer to 1 arcminute.

The sextant is contained in a fitted black plastic box.

Ebbco started manufacturing these plastic sextants in the 1960s, especially for the yachting market.

Object Details

ID: NAV1225
Collection: Astronomical and navigational instruments
Type: Boat Sextant
Display location: Not on display
Creator: East Berks Boat Co
Date made: circa 1960
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 95 mm x 230 mm x 240 mm
Parts: Boat Sextant
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