GENERAL ACOUSTICS © GENERAL ACOUSTICS GmbH, Germany Phone: LOG_aDSLP ® Approved Innovation for Highly Precise Detection of Bathymetry (Fluid/Solid) and Sediment Transport Processes

GENERAL ACOUSTICS © LOG_aDSLP ® - Performance The online results are precisely determined layer interfaces of suspensions and the real solid bottom. in any complex stratification of any material, at any time, at any place Free from calibration Free from result interpretation

GENERAL ACOUSTICS © LOG_aDSLP ® and Conventional Echo Sounders

GENERAL ACOUSTICS © Acoustisc Processes – Reflexion, Scattering ReflexionScattering Density/ Impedance Z1<<Z2<<Z3 Density/ Impedance Z1<=Z2<=Z3 Or Smooth Density Gradient Z1 Z2 Z3 Z1 Z2 Z3 Layers with highly different densities Reflection at boundary surfaces is predominant Reflection independent of utilised frequencies Continuous transition of density or equal density, scattering process is dominating Only change in inner structure Scattering is dependent on the utilised frequencies Detection and analysis of the different processes is a unique ability of the DSLP ® Conventional methods require strong differences in density Conventional methods can‘t detect these strata

GENERAL ACOUSTICS © LOG_aDSLP ® – Applications Sediment Transport : Hydrographic Surveying - Determination of erosion/sedimentation areas - Near bottom survey of erosion and sedimentation processes - Highly precise bathymetry - Detection of surface sediments - Detection of scour (local change of depth)

GENERAL ACOUSTICS © LOG_aDSLP ® Surveying

GENERAL ACOUSTICS © LOG_aDSLP Online Result, River Elbe Sluice Brunsbuettel

GENERAL ACOUSTICS © Fluid-Mud-Region 10 Pa * s Density = 1,2g/cm³ Example: River Ems, Germany

GENERAL ACOUSTICS © Sediment Dynamics Rhinplatte, Elbe River

GENERAL ACOUSTICS © LOG_aDSLP: Suspensions and Fluid/Solid Interface Detection Technology highly accurate detection of water depths and sediment transport on the basis of sound Innovation/ Unique selling proposition precise bathymetry due to proof of fluid/solid interface detection of significant suspensions Applications hydrographic surveying at rivers, lakes, harbours, reservoirs detection of scour (local change of depth) detection of nautical bottom References Expert reports confirm lastingly the technical superiority 1998, 1999, 2000, 2002, 2004, 2005 won comparison test against 5 competitors (2004) References: Hamburg Port Authority, Ruhrverband-River Basin Management (GER), etc.

GENERAL ACOUSTICS © LOG_aDSLP ® Specification: Water Depth: 0.5 m – 500 m (deeper on request) Frequencies: 38 kHz (or 75 KHz) and 125 kHz Power: up to 5 KW Technical Resolution: < 1 mm Ping rate: up to 20 Hz Accuracy: < 3 cm Gain: TVG / AutoGain Inputs: DGPS (RTK), PPS, HRP, Sound velocity probes Outputs: digital multi purpose data as input for all common GIS, coordinate trafo for local systems, xyz