This glass clinometer by Moeller Instruments is a precision instrument often used on vessels to measure the angle or tilt (heel) of the ship. It includes two spirit-filled glass tubes mounted on a sturdy panel. Each tube has marked graduations, enabling precise measurement of angles in increments allowing for various heeling scenarios depending on the ship's movements and loading conditions. The gauge face includes a vibrant red colors, which helps with readability in low light conditions, making it a valuable tool for night sailing as well.
