Celestaire Astra IIIB Sextant
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Celestaire Astra IIIB Sextant

  • Select Mirror Type
  • Frame Material: Lightweight Aluminum Alloy
  • The Most Recognized and Supported Sextant Worldwide
  • Item #: 
    Model #: 
    Multiple Models Available
    Shipping Weight: 
    8.20 Lbs.
    Reg. Price:
    Sale Price:
    Please enter quantity below.


    Mirror Type
    Model #
    0502 D
    MAP Price: $659.00
    0501 D
    MAP Price: $659.00
    Click the "More Info" button above for specific information about that product.

    The Astra IIIB has somewhat revolutionized celestial navigation. Never before has such a high quality, accurate metal sextant been available at such a low price. Over 23,000 sextants of this model have been sold in the US alone in the past 26 years, far more than any other serious sextant. Its popularity has spread throughout the rest of the world as well, making it the the most recognized (and supported) sextant worldwide.

    Its low price, excellent optics and choice of horizon mirrors and other accessories makes it the perfect selection for beginners. Yet, we know several professional navigators who prefer the ASTRA IIIB merely because they can leave their expensive models at home without sacrificing noticeable accuracy.


    • Ability to quickly and economically change the type of horizon mirror
    • Inexpensive replacement parts aids maintainability when students mishandle the sextant
    • LED lighting of the arc and drum (powered by 2 AA batteries - not included)
    • Package Incudes:
      • Varnished wooden case
      • Instruction book included
      • Adjusting wrench included
      • Certificate of accuracy

    Arc -5° + 130° - radius 6" (153mm)
    Accuracy ± 20 sec. throughout the arc
    Micrometer Drum 1' scale - vernier to 0.1'
    Mirror Configuration Whole or Split (Traditional)
    Horizon Mirror 2" (51mm) diameter
    Index Mirrors 2.2" x 1.65" (56mm x 42mm)
    Shades 4 index - 3 horizon
    Weight 2 lbs, 10 oz (Sextant Only)
    Case Dimensions 6.5" x 13" x 11"

    Models Available: 0501 D and 0502 D 
    WARNING: This product MAY expose you to chemicals, which are known to the State of California to cause cancer, birth defects and/or other reproductive harm. For more information go to www.p65warnings.ca.gov

    Celestaire Astra III Professional Sextant
    Item #: 800591
  • Select Mirror Type
  • Frame Material: Bronze Arc Fused to an Aluminum Frame
  • Destined to Be the Standard for Professional Seamen

    Model #:
    Multiple Models Available

    Davis Instruments Artificial Horizon
    Item #: 803271
  • Dimensions: 6" x 4" x 1-1/2"
  • Windproof, Corrosion Resistant
    Reg. Price

    Sale Price

    Model #:

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