Since the start, automated systems are involved in survey aspects of offshore engineering and dredging. From the first use of single beam echo sounder with sextant positioning till advanced multibeam and ultra-short baseline systems in combination with RealTime Kinematic GPS.

For the determination of the bottom in canals and ditches on a smaller scale often simpler methods are being used because these areas are often poorly accessible for survey vessels.

Survey of water bottom

- Soundings
- Volume determination