HD-MAX Ⅱ dual-frequency echo sounder redefines underwater surveying. Its enhanced host unit is water-resistant, portable, and offers versatile interfaces. The integrated temperature sensor in the transducer enables precise sound velocity calibration, and the fully automated algorithm tackles challenging terrains. Ideal for a wide range of underwater environments, including dredging, siltation, high sediment areas, and deep waters, HD-MAX Ⅱ is the unrivaled choice for hydrographic professionals.