The Freiberger Drum Sextant is a premium-quality device that is used to measure the altitude of celestial bodies in the sky. Using that data one can calculate the current location either on sea or on land.
Downloads
| Article Number | Features |
| 108550:017.26 | Drum Sextant grey, split-view horizon mirror, correction value ≤ 40“, wooden handle |
| 108550:027.26 | Drum Sextant grey, split-view horizon mirror, correction value ≤ 40“, plastic handle |
| 108550:018.26 | Drum Sextant grey, full-view horizon mirror, correction value ≤ 40“, wooden handle |
| 108550:028.26 | Drum Sextant grey, full-view horizon mirror, correction value ≤ 40“, plastic handle |
| 108550:517.26 | Drum Sextant black, split-view horizon mirror, correction value ≤ 40“, wooden handle |
| 108550:527.26 | Drum Sextant black, split-view horizon mirror, correction value ≤ 40“, wooden handle |
| 108550:518.26 | Drum Sextant black, full-view horizon mirror, correction value ≤ 40“, wooden handle |
| 108550:528.26 | Drum Sextant black, full-view horizon mirror, correction value ≤ 40“, plastic handle |
| 108550:017.24 | Drum Sextant „Sirius“, grey or black, split-view horizon mirror, correction value ≤ 20“, wooden handle |
| Arc | radius | 170 mm |
| scale of degrees | -5° to 125° | |
| division | 1° | |
| Vernier | division | 1' |
| estimation | 0.1' | |
| Telescope | lens aperture | 40 mm |
| magnification | 4 x | |
| Available models |
handle | plastic |
| hardwood | ||
| colour | grey | |
| black | ||
| blue | ||
| Instrument | dimensions | 26 x 24 x 13 cm |
| weight | 1.4 kg | |
| Wooden case | dimensions | 34 x 322 x 17 cm |
| weight (with sextant) | 4.5 kg |
Invaluable
- positioning system that does not require any electronic equipment; not influenced by electromagnetism
- very long life cycle
- no electrical equipment required
- necessary navigational equipment for deep-sea vessels
Safe Navigation
- easy to find and read the correct angle value
- clear view thanks to high-quality mirrors, corrosion-resistant materials and accurate adjustability
- equal luminosity of both images thanks to the matching transparency of both the index shades and horizon shades
- taking a sight is made easy and comfortable thanks to the large visual field in the telescope and the rubber eye-shield
- light, rigid and corrosion-resistant aluminum frame
- the index arm is perfectly protected between the frame and the handle
- high-quality wooden case
- adjustment tool for the mirrors
- test certificate
- user’s guide
Accessories
- illumination device
- 8x30 prism telescope
- increase of scale range to 225 degrees by means of an attachable pentaprism
Mirrors
There are two different horizon mirrors available for our Drum Sextants:
- traditional / split-view mirror
- full-view mirror
The split-view mirror has a reflective part on the right and a non-mirrored part on the left. It provides better visibility of the horizon and the observed celestial body thanks to increased luminosity of the left non-mirrored part.
The full-view model uses a translucent mirror with a reflective film over the entire surface. This provides a full view of the horizon and the observed celestial body without interruption.
Our recommendation
If you are not that much familiar with using a sextant we would recommend purchasing a full-view model.
