Single Beam Echo Sounder (SBES) is a bathymetric survey technology that utilizes the reflection of sound waves to quickly and accurately measure vertical depth. This tool is simple, economical, and highly effective for use in shallow waters such as rivers, canals, and swamps. Although it only produces data on a single track, SBES remains an important instrument because its results can be tidally corrected and combined with GPS/RTK, thus providing consistent, reliable depth data that supports navigation, mapping, and water infrastructure planning.
Tidal Observation Concept
Ocean depth measurements using a Single Beam Echo Sounder or other acoustic instruments must always be corrected for tides, as sea levels are constantly changing. By reading the water level (R), comparing it to Mean Sea Level (MSL), and then referring to Chart Datum (AEA) as a single reference, all depth data can be standardized. This correction ensures that bathymetric survey results are accurate, consistent, and safe for use in navigation, mapping, and marine infrastructure planning.