Artificial Bubble Horizon

Master celestial navigation even when the horizon disappears
When the natural horizon fades into darkness, fog, or simply isn’t visible, this bubble artificial horizon becomes your trusted ally. Designed for sextant users, it allows you to measure celestial altitudes with precision, whether you're practicing on land or navigating under challenging conditions. No more waiting for clear skies—this tool brings the horizon to you, ensuring your navigation skills stay sharp anytime, anywhere.

Engineered for precision and ease of use
This bubble artificial horizon replaces the standard telescope on your sextant, integrating a bubble level and a 45° inclined mirror. The mirror reflects the bubble’s image directly into your line of sight, while an engraved line simulates the horizon. When the bubble aligns with this line, your sextant is perfectly horizontal, allowing you to measure the altitude of stars, the sun, or other celestial bodies just as you would with a natural horizon. The system uses a slit aperture to keep both the bubble and the celestial body in sharp focus, ensuring accuracy without the need for magnification.

Built for practice and training
While this model is not illuminated—limiting its use to daylight or twilight—it delivers reliable performance for training and practice. With a precision of approximately 2 arc minutes under ideal conditions, it provides a practical way to hone your sextant skills without the complexity of professional-grade tools. Lightweight at just 0.8 kg, it’s easy to handle and compatible with most metal sextants, making it a versatile addition to your navigation toolkit.

This bubble artificial horizon is designed for simplicity and effectiveness, offering a 3x magnification through a 25 mm objective lens. The bubble level, visible against a red illuminated background, ensures clear alignment, while an adjustable brightness control lets you adapt to varying light conditions. A removable solar protection glass adds versatility, and the entire system is certified for training purposes, ensuring reliability when it matters most.

• Why choose this bubble artificial horizon for your sextant? It transforms challenging conditions into opportunities for practice, allowing you to measure celestial altitudes even when the natural horizon is obscured. Lightweight and easy to install, it’s compatible with most metal sextants, making it a practical choice for navigators looking to refine their skills. While not intended for serious navigation, its precision and ease of use make it an invaluable tool for training, ensuring you’re always prepared—no matter the visibility.