Altimeters

Altimeters are sonar devices used primarily for measuring the distance between an underwater vehicle (such as an ROV or AUV) and the seabed or another underwater structure. By sending out a sound pulse and measuring the time it takes for the signal to bounce back, altimeters provide real-time altitude or distance data. This precise distance information is essential for maintaining a controlled depth and safe proximity to underwater surfaces, especially in navigation and inspection tasks in low-visibility conditions. Altimeters are commonly integrated into navigation systems to assist with altitude control and are crucial for maintaining safe, close-range maneuvering.