Stillwaters of all sizes can be surveyed to provide bed topography information and volume calculations for different levels of water. Vast and deep waters can be surveyed quickly using a single or multi-beam echo sounder and real-time kinematic GNSS. Lakes and reservoirs that are inaccessible with a normal car, can be accessed with a 4×4 or quad bike. Silt surveys can be undertaken of lakes to establish hard and soft bed levels and subsequent silt volumes can be calculated. Stillwaters are presented as contour drawings or coloured by elevation to represent any bed features.