Side Scan Sonar Systems and Transducers

Side scan sonar systems combine a towed or hull-mounted transducer with a display and processing unit, building a detailed image of the seafloor or riverbed across a wide swath on either side of the survey path. The transducer sends acoustic pulses outward and measures the return signal strength and timing, converting that data into a visual map showing terrain features, debris, and objects resting on the bottom. Frequency options typically range from 100kHz for deeper water and wider coverage up to 900kHz-1200kHz for shallow water work needing finer detail.

Coverage width per pass varies by frequency and depth, commonly reaching 50 to 200 metres total across both sides of the survey line. Towfish versions trail behind a survey vessel on a cable, keeping the transducer stable and closer to the bottom for sharper imaging in deeper water, while hull-mounted versions suit shallower rivers, lakes, and harbor work without needing a separate tow cable. Depth rating on towfish units often reaches several hundred metres, letting operators survey well beyond the range of standard hull-mounted equipment.

Data recording software logs GPS position alongside sonar imagery, letting operators build a georeferenced map of the surveyed area for later analysis. Some systems add automatic target recognition, flagging shapes on the seafloor that match common object profiles like wrecks, pipelines, or unexploded ordnance for closer review.

Maritime security and coast guard units use side scan sonar to search for underwater objects, hazards, or contraband near ports and coastal waters. Search and rescue teams use it to locate submerged vehicles or missing persons across a wide search area. Hydrographic survey firms also rely on side scan sonar for mapping riverbeds and harbor floors ahead of dredging or construction work.

Tactical Supply Pakistan supplies side scan sonar systems and transducers to maritime security units, search and rescue teams, and survey firms across Pakistan. Frequency and mounting configuration are matched to expected water depth and survey scope.