Side Scan Sonar

 

Side scan sonars are specialised systems used to detect objects and identify surface sediments through acoustically scanning the ocean floor.

During the measurement, they transfer acoustic sound energy and analyse the signal (echo) reflected by the ocean floor. The strength of the back-scattering is digitally recorded as part of a continual process, thereby creating a geo-referenced "sound image" of the ocean floor. The visualisation of the reflected signals enables subsequent object mapping and sediment classification.

 


Side scan sonars can be operated in a range of variants. Systems that are permanently connected with the sounding vessel are particularly suitable for areas near the coast. The water depths in the North and Baltic Seas require the systems to be used as "Towfish". In this arrangement, the systems are guided behind the sounding vessel at a relatively constant height above the ocean floor. The alignment of the sonar over the ocean floor depends on the desired resolution and area coverage of the measurement. 


Vermessungsbüro Weigt currently has various side scan sonars in its in-house stock. These include, for instance:

 
 
 

Both systems are operated as "Towfish". A rigid connection to the surveying vessel can be created in areas of shallow water or when surveying rivers.    


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