Davis Instruments Artificial Horizon Review

The **Davis Instruments Artificial Horizon**: A Review After Real Use

As a seasoned gear and equipment specialist with over a decade of hands-on experience across diverse environments, from dusty workshops to sterile labs and rugged outdoor expeditions, I approach new tools with a critical, discerning eye. The Davis Instruments Artificial Horizon is one such piece of equipment that addresses a very specific, yet crucial, need for a particular group of users. This compact device aims to provide a reliable reference plane for sextant users when a natural sea horizon is unavailable or obscured.

My journey to acquiring this artificial horizon was born from necessity. I found myself needing to hone celestial navigation skills during periods of inland training, where the familiar expanse of the open ocean was miles away, and fog often rendered even the closest terrestrial horizon useless for precise measurements. Relying solely on simulated conditions within textbooks or complex software felt increasingly insufficient. I needed a tactile, repeatable method to practice those critical sextant shots.

Upon unboxing, the initial impression was one of sturdy utility. It felt solid, not fragile, and the materials suggested resilience. While not a high-precision scientific instrument in the vein of laboratory-grade optics, its construction conveyed a sense of purposeful design for its intended application. I briefly considered DIY solutions involving mirrors and leveling, but the availability of a purpose-built, windproof unit from a reputable manufacturer like Davis Instruments made this option far more appealing for consistent results. My immediate reaction was one of pragmatic optimism – a promising tool to bridge a significant gap in my training regimen.

Real-World Testing: Putting **Davis Instruments Artificial Horizon** to the Test

First Use Experience

My initial testing of the Davis Instruments Artificial Horizon took place on a clear, sunny afternoon in my backyard, far from any coast. The device was set up on a stable, level surface, and I followed the included instructions to fill its reservoir with water. The process was straightforward, requiring only ordinary tap water and minimal fuss.

I then proceeded to use my trusty sextant to take readings of the reflected sun, aiming for the perfectly still surface of the water within the artificial horizon. The contrast between the clear, sharp reflected image and the occasional shimmer of a real horizon practice I’d done previously was noticeable. Performance under these ideal conditions was as expected; the water surface provided a clear, albeit small, reflective plane.

The ease of use was immediately apparent. There was no complex setup or calibration required beyond filling it with water. The device provided a stable, predictable surface, allowing me to focus entirely on my sextant technique. My only minor surprise was the compactness of the unit; while the dimensions were listed, holding it and visualizing its practical use brought that scale into clearer focus.

Extended Use & Reliability

Over several weeks, I incorporated the Davis Instruments Artificial Horizon into my regular practice sessions. I used it during early morning sessions when dew might have been an issue for other surfaces, and even attempted a few readings on a slightly breezy day, observing how the water’s surface behaved under those minor disturbances. The enclosed nature of the reflecting surface did a commendable job of mitigating minor air currents.

Durability has been satisfactory for its intended use. After repeated filling and emptying, and being stored with its lid on, there are no signs of cracks or material degradation. The plastic construction, while not metal, feels robust enough for its purpose. I’ve accidentally knocked it on my workbench once, and while it didn’t break, it did get a minor scuff, which is to be expected from such a material.

Maintenance is exceptionally simple. After each session, I simply empty the water, give it a quick rinse with fresh water, and let it air dry before replacing the lid. There’s nothing complex to clean or maintain, which is a significant plus. Compared to attempting to create a makeshift horizon with a bowl of water or relying on perfectly still puddles, this unit offers a far more consistent and reliable experience.

Breaking Down the Features of **Davis Instruments Artificial Horizon**

Specifications

The Davis Instruments Artificial Horizon measures a compact 6″ x 4″ x 1-1/2″ (15 x 10 x 4 cm). This compact design is a key feature, making it easy to transport and store without taking up excessive space, whether in a gear bag or on a workbench. Its construction is primarily corrosion resistant, a crucial aspect given its interaction with water and potential exposure to salty environments. The reflecting surface is completely enclosed, which is a significant design element that protects the water’s surface from wind and contaminants.

The unit includes two sun shades, which are important for reducing glare and improving the visibility of the reflected image during sextant measurements, especially when observing the sun. It also comes with a lid for protection when not in use and for easy storage and transport. The black color is standard and functional, not impacting its performance.

These specifications are vital for its intended use. The enclosed design is paramount for creating a stable, undisturbed reflective surface, which is the core function of an artificial horizon. The compact size makes it practical for portability, and the included accessories like sun shades enhance its usability in various lighting conditions.

Performance & Functionality

The primary function of the Davis Instruments Artificial Horizon is to provide a stable, artificial horizon for sextant use. In this regard, it performs its job admirably. By filling the shallow tray with water, a near-perfectly flat reflective surface is created. When using a sextant, the angle measured is essentially the angle between the celestial body and its reflection on the water’s surface. Halving this reading, after accounting for index error, gives the altitude of the celestial body above the true horizon.

Its biggest strength lies in its simplicity and effectiveness in providing that crucial reference plane. For users unable to access a natural sea horizon, it democratizes the practice of celestial navigation, allowing for accurate position fixing inland or under poor visibility conditions. The enclosed design is a standout feature, providing a noticeable advantage over open containers of water, especially if even a slight breeze is present.

A potential weakness, inherent to its design, is the reliance on a perfectly level surface for optimal performance. While it provides a stable reference, any tilt in the unit will introduce error into sextant readings. Additionally, the enclosed water surface, while protected from wind, can still be affected by vibrations transmitted through the surface it rests on.

Design & Ergonomics

The design of the Davis Instruments Artificial Horizon is deliberately utilitarian and functional. The black, corrosion-resistant casing is made of a durable plastic that feels substantial enough for regular use. Its overall form factor is low-profile and rectangular, fitting easily into a hand or a dedicated compartment in a navigation kit.

Ergonomically, the unit is straightforward. There are no complex controls. The main interaction involves filling the reservoir and placing it on a level surface. The slight lip around the edge of the water tray is helpful for preventing overfilling and contains any minor spills.

The inclusion of the lid is a thoughtful touch, protecting the internal surface and the water reservoir from dust and scratches when stored. The two sun shades are also well-integrated, designed to be positioned effectively over the reflecting surface without being cumbersome.

Durability & Maintenance

The Davis Instruments Artificial Horizon is designed for practical, repeated use rather than extreme ruggedness. The corrosion-resistant plastic construction suggests it can withstand incidental contact with water and the elements. I anticipate it will last for many years with proper care, particularly avoiding harsh solvents or prolonged exposure to extreme temperatures.

Maintenance is delightfully minimal. The instructions specify filling with water and emptying afterward, a process that takes seconds. Occasionally, a gentle cleaning with a soft cloth and mild soap might be necessary if any residue builds up on the interior reflecting surface, but this is rare. I’ve found that simply rinsing with clean water and allowing it to air dry has been sufficient for keeping the reflective surface clear and functional.

The primary potential point of failure, as with any device holding liquid, would be if the casing were to crack or become compromised. However, the materials feel solid, and its compact size reduces the likelihood of significant impacts. For its intended purpose, the durability seems more than adequate.

Accessories and Customization Options

The Davis Instruments Artificial Horizon comes with a few essential accessories that enhance its usability. The two sun shades are particularly valuable, aiding in reducing glare and improving the clarity of the reflected image, especially when observing the sun. These are simple but effective additions that prevent the need for makeshift solutions.

The lid is another critical accessory, serving to keep the unit clean and protected during storage and transport. It fits securely, preventing dust and debris from entering the water reservoir.

There are no real customization options for this particular unit, as its design is highly specialized for its function. It’s not a modular piece of gear that lends itself to modification. However, its straightforward design means it interfaces with any standard sextant, and the quality of the water used can be considered a form of “customization” – distilled water might offer a slightly clearer reflection, though tap water is perfectly adequate for most practice sessions.

Pros and Cons of **Davis Instruments Artificial Horizon**

Who Should Buy **Davis Instruments Artificial Horizon**?

The Davis Instruments Artificial Horizon is an indispensable tool for anyone seriously engaged in learning or practicing celestial navigation who cannot consistently access a clear sea horizon. This includes offshore sailors training for voyages, aspiring navigators studying inland, students in maritime academies, and even hobbyists interested in traditional navigation methods. It is ideal for individuals who prioritize practical, hands-on training and require a consistent, reliable reference for sextant practice.

Those who should probably skip this product are individuals who primarily rely on electronic navigation systems and only need a passing familiarity with celestial navigation. It is also not suited for professional maritime use where official certification might require specific equipment or methods. Furthermore, if you have guaranteed access to a clear sea horizon for all your practice sessions, this unit might be an unnecessary addition.

For those who do purchase it, ensuring you have a very stable and level surface to place it on is key. A sturdy portable table or a known flat surface in your training area will maximize its utility. It pairs perfectly with any standard marine sextant and a good almanac and sight reduction tables.

Conclusion on **Davis Instruments Artificial Horizon**

The Davis Instruments Artificial Horizon is a testament to effective, purpose-driven design. It addresses a fundamental challenge in celestial navigation training with elegant simplicity and robust functionality. For its price point of $99.79, the value it offers is exceptional, democratizing practice for those far from the sea or frequently encountering poor visibility.

It delivers on its promise to provide a stable, reliable reference plane, making those crucial sextant shots possible in less-than-ideal conditions. The build quality, ease of use, and included accessories all contribute to a highly positive user experience. I would personally recommend this artificial horizon to any aspiring or practicing navigator who needs a dependable tool for honing their skills. It’s a small investment that can yield significant returns in navigational proficiency, ensuring you’re prepared when the open ocean, or even just a foggy morning, calls.