Type C.K.25

The sextant has a grey-lacquered alloy casing with artificial materials housing optical equipment. The instrument has four settings for shades in clear, dark grey, and two blue.

The sextant has a circular black scale with two scales, each from 0° to 100° by 1°. It also has a black plastic micrometer to 1 arcminute.

The solar sextant was screwed onto the search periscope of a submarine, for taking sights of both the Sun and stars; this type was probably used on British conventional submarines.

The provenance suggests that Barr and Stroud manufactured this instrument.

Object Details

ID: NAV1979
Collection: Astronomical and navigational instruments
Type: Solar sextant for submarine periscope
Display location: Not on display
Creator: Unknown; Barr & Stroud Ltd
Date made: 1970s; 1970-1980 1970-80
Credit: National Maritime Museum, Greenwich, London
Measurements: Overall: 215 x 100 x 101 mm
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