Hydrographic surveys include geodetic and oceanographic surveys conducted in water-covered environments. Two important components of geodetic surveys are position and depth surveys.

‘Bathymetry’, one of the hydrographic measurements, is a measurement method that includes depth and location information for determining underwater topography.

Bathymetric measurements are generally made with two different measurement methods in today’s technology: multibeam and singlebeam. In general, RTK measurement method is preferred due to the high location precision in marine measurements.