Topographic surveys of the riverbed in the estuary of the Elbe are to be awarded at different intervals, which are to be measured with both multibeam echosounder and single-beam sounder systems. The project area has a total area of up to approx. 280 km². The areas to be surveyed are located outside the fairway and extend to the edges of the mudflats. The service to be awarded also includes the documentation of the calibration, calibration and testing of the measuring systems before and during the measurement, data plausibility check and delivery of the data and documentation to the client. The contract to be awarded will run for four years.

The service includes the following work:

Survey with multibeam echosounder of the dam structures of the underwater deposit areas (UWA) Neufelder Sand (528 ha) and Medemrinne (54 ha),

Survey with single-beam plumb line spacing with 25 m line spacing of the remaining areas UWA Neufelder Sand (265 ha) and Medemrinne (1499 ha),

Surveying of Altenbrucher stacks primarily with multibeam echosounder and partly with single-beam plumb with 15 m line spacing (142 ha),

Surveying Otterndorfer Stacks with UWA Otterndorf primarily with multibeam echosounder and partly with multibeam echosounder with line plumb line with 15 m line spacing (302 ha),

Surveying of the Elbe estuary direction finding area with single-beam plumb line spacing mainly 100 m and partly with a line spacing of 100 m also 15 m (25,264 ha),

Surveying of the Medemrinne-West direction finding area with single-beam plumb line spacing of 100 m (3,729 ha),

Water survey of the bearing rings in the tidal flats area up to the low water line (approx. NHN -1.5 m),

Documentation of the calibration, calibration and testing of the measuring systems before and during the measurement,

Documentation of the measurement and plausibility check,

Delivery of data and documentation