Hydrographic surveys include geodetic and oceanographic surveys in environments covered by water. Two important components of geodetic studies are position and depth measurements.

‘Bathymetry’, one of the hydrographic surveys, is a survey method that includes depth and position information for determining the underwater topography.

In today’s technology, bathymetric surveys are generally carried out with two different survey methods: multibeam and singlebeam. In general, RTK surveying method is preferred for marine surveying due to its high position accuracy.