Underwater
Acoustic Imaging

Using acoustic imaging, Collins can perform high resolution scans of the underwater portions of a structure as well as the channel bottom surrounding the structure. These scans give Collins the unique ability to show bridge owners exactly what the divers saw or felt below water regardless of water clarity. Collins also uses this technology to identify potential structural deficiencies and hazards prior to entering the water to increase diving safety and efficiency. Collins frequently uses acoustic imaging while the diver is in the water to allow topside personnel to direct the diver to specific areas of interest during the inspection.

Collins uses a Kongsberg Mesotech high resolution scanning sonar with both imaging and profiling transducers. Various custom built sonar deployment and support apparatuses are used to properly position and stabilise the sonar unit to optimise accuracy during both imaging and profiling operations.

Acoustic profiling allows Collins to perform quantitative measurements of below water structure configurations, structural deficiencies, and scour depressions with an accuracy of up to 2.5 millimetres.