Ideal for commercial sailing use, this Freiberger Drum Sextant is a traditional instrument used for celestial position navigation at sea. Favored by seafarers due to its reliability, this lightweight sextant has been made with a light metal alloy frame and has 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, while the standard telescope 4×40 is adjustable for height and fitted with a protective rubber eyepieces. The optimal 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.

Features of Freiberger Drum sextant include:

  • Graduated arc of radius 170mm with a scale of degrees of -5 to +125 degrees measured in one degree intervals. Drum graduations are 1′. Visual interval 0.1′.
  • Dimensions (sextant only) 26cm x 24cm x 13cm.
  • Wooden carrying case dimensions 34cm x 32cm x 17cm.
  • Weight Sextant only 1.4kg
  • Weight Sextant with case 4.5kg
  • Hardwood handle.
  • Key for mirror adjustment.
  • Test certificate.
  • Operating and adjust manual

Optional Extras include:-

  • Illumination device which is detachable (battery operated)
  • 8 x 30 monocular telescope
  • Can be supplied as a surveying sextant (for horizontal sights) and fitted with a detachable penta prism to extend the measuring range to 215 degrees.

Freiberger Drum Sextant Specifications

Recommend0 recommendationsPublished  in Marine Sextants

Leave a reply

Your email address will not be Published . Required fields are marked *


Copyright © Celestaire, Inc. 2023 | All Rights Reserved.

All files and information contained in this Website or Blog are copyright by Celestaire, Inc., and may not be duplicated, copied, modified or adapted, in any way without our written permission. Our Website or Blog may contain our service marks or trademarks as well as those of our affiliates or other companies, in the form of words, graphics, and logos. Your use of our Website, Blog or Services does not constitute any right or license for you to use our service marks or trademarks, without the prior written permission of Celestaire, Inc.. Our Content, as found within our Website, Blog and Services, is protected under United States and foreign copyrights. The copying, redistribution, use or publication by you of any such Content, is strictly prohibited. Your use of our Website and Services does not grant you any ownership rights to our Content.


We're not around right now. But you can send us an email and we'll get back to you, asap.


Log in with your credentials


Forgot your details?

Create Account