Review on Johnson Level Tool Pitch Locator by Michael Vargas

One of the unusual uses you can use is measuring the tilt of your telescope above the horizon to help you find objects. Just stick it anywhere on your telescope and it will read the number of degrees on the scale. Websites like Stellarium give you the apparent height above the horizon for your observing location of any object, which you can match on a dial to get close to what you're trying to find. I mounted one on the top of my 17.5 inch Dobsonian reflecting telescope. Just make sure it stays perpendicular to the ground as your telescope tilts up and down so the needle doesn't get stuck. It's definitely better than guessing.