Specialty Devices Inc.

Hydrographic Survey Systems

Single beam acoustic survey

Single beam acoustic survey is by far the most widely used bathymetric survey technique for much of the last 50 years. Single beam bathymetric survey is a relatively low-cost method, however can providing highly accurate water depth information. SDI provides high-resolution single beam acoustic bathymetric survey service for rivers, ponds, lakes and coastal environment.
SDI perform single beam acoustic bathymetric survey by using SDI manufactured SDI Surveycase SC-200. The SDI SC-200 is a hydrographic survey system contained in a single, portable, splash proof unit. It can be easily deployed on small boats or ships of opportunity. The system includes an Intelligent Depth Sounder (IDS), digital sub-bottom profiling capability, a Differential GPS receiver (DGPS), a reference receiver, a navigation computer, a TFT color display, survey software and rapid data playback and review software. The SDI SC-200 system used on this operation included operating frequencies of 200 kHz using a 3 degree beam transducer for surveying the water bottom. SDI SC-200 can collect bathymetric data in extremely shallow water (as shallow as 0.2 m) and provide horizontal accuracy to within 2 cm. SDI manufactured MRU can offer motion reference for motion compensation during data acquisition. All echoes are individually received and digitized and stored as a raw echo to allow maximum post-processing flexibility.

Key Benefits:
• Low-cost for data acquisition and post-processing
• Accurate and reliable bathymetry
• Can work in extremely shallow water (as shallow as 0.2 m deep)


  • Reservoir volumetric survey
  • Pipeline and cable routing studies
  • Pre-Post dredging survey
  • Environmental restoration
  • Hazard surveys

Examples of single beam acoustic surveys

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