TDOT 3 GREENTDOT 3 NIR

Use in surveying seabed topography under special conditions
Surveying the seabed topography of high-salinity seas accurately

Laser beams travel slower in water than in air, so they are refracted at the water’s surface.
Surveying under water requires specifying the water surface location, calculating the effect of laser beam refraction and calculating the correction of coordinates for the point cloud under water. Using TDOT 3 GREEN’s dedicated UNDERWATER CORRECT, these refractive index effects can be compensated automatically by simply specifying the water surface location from a cross-sectional view. The Dead Sea in Israel, shown here with a salinity of 30%, was also accurately visualized the subsea topography using UNDERWATER CORRECT.