Davis Mk12 Master sextant
Successor to the MkIII plastic sextant and forerunner of the current Mk15.
Product details: Davis Mk12 Master sextant | Davis Instruments | Sextant | Home / hobby | Material: Plastic
The Mk12 was an attempt to create a sextant that looks more like the 'real' sextant than the MkIII which preceded it. It looks similar to a normal scale brass sextant. It is however still a vernier sextant. What looks like the drum is actually a fricion wheel that moves the index limb. It does make the sextant easer to control than the MkIII but it is just as accurate. There is both a sight tube and a telescope with the instrument as well as a number of coloured filters. It looks better than the MkIII but does not perform as well because the friction wheel every now and then just slips. The sextant is very rare and was replaced with the Mk12 which is a 'proper' plastic drum sextant.
Davis Mk12
Data sheet
- Year
- 1970s
- Type of use
- Home / hobby
- Material
- Plastic
- graduation
- deg
- measuring range
- 125
- Radius limb in mm
- 180
- accuracy
- 2'
- fine reading
- vernier (single)
- Size instrument (l x w x h) in m
- 0.25 x 0.25 x 0.11
- weight instrument in kg
- 0.3
- Size case (l x w x h) in m
- 0.25 x 0.30 x 0.12
- weight case & in kg
- 0.6
- country obtained from
- United Kingdom
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Successor to the MkIII plastic sextant and forerunner of the current Mk15.
Product details: Davis Mk12 Master sextant | Davis Instruments | Sextant | Home / hobby | Material: Plastic