Davis Artificial Horizon [144]

This artificial horizon is a must - have for every sextant user who can't rely on a natural sea horizon. It's perfect for backyard practice, pinpointing your position inland, and taking accurate sextant readings on foggy mornings. Simply fill it with water, then use your sextant to read the angle of the reflected sun. The sun's angle above the true horizon is half of your sextant reading. It's windproof and corrosion - resistant, with a fully enclosed reflecting surface. Comes with two sun shades, a lid, and detailed instructions. Compact size: 6' x 4' x 1 - 1/2' (15 x 10 x 4 cm). Also includes an Owner's Manual (pdf).

Using your Davis Artificial Horizon is easy. First, find a suitable location. You can use it in your backyard for practice or when you're inland. Then, fill the artificial horizon with water. Take your sextant and use it to read the angle of the reflected sun. Remember, the actual angle of the sun above the true horizon is half of what you read on the sextant. When it comes to taking care of your artificial horizon, keep it in a dry place to prevent corrosion. Since it's windproof, it can be used in normal windy conditions, but avoid extreme weather. If you need to clean it, use a soft cloth. Don't forget to check the enclosed sun shades, lid, and full directions that come with the product for more detailed information.