Nautic > Drum Sextant
Drum Sextant

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Drum Sextant
 
The traditional instrument for celestial position finding in sea.
Comfortable weight and size with excellent balance from its well designed light metal alloy frame. Large horizon and index mirrors which are tested for optical flatness and parallelism. The clamping device and micrometer drum are fully enclosed for protection against dirt and water spray.
 
Standard telescope 4x40 is adjustable for height and fitted with a protective rubbers eyepiece. The correct amount of brightness through the sextants optical light paths is controlled by means of swing in graded filters 4 for the index and 3 for the horizon mirrors.
 
Option
Illumination device which is detachable (battery operated)
8 x 30 monocular telescope
Can be supplied as a surveying sextant (for horizontal sights) and fitted whith a detachable pentad prism to extend the measuring range to 215 degrees.
 
Specifications:
Graduated arc
Radius
170mm
 
Scale of degrees
-5° to 125°
 
Interval
Drum graduations
Interval
1'
 
Visual interval
0.1'
Telescope
Lens aperture
40mm
 
Magnification
4x
Variation
Handle
Plastic/ hardwood
 
Colour
Black/ grey or blue
Dimensions
Drum sextant
26 x 24 x 13cm
 
Carrying case
34 x 322 x 17cm
Weight
Drum sextant
1.4kg
 
Carrying case
4.5kg