Side Scan Sonar Survey company in Jehanabad, Bihar.Active acoustic imaging technique that generates seafloor Map

Side-scan sonar is an active acoustic imaging technique that generates detailed grayscale “sonograms” of the seafloor by emitting fan-shaped acoustic pulses perpendicular to the vessel track and recording the intensity of backscattered echoes. It is typically deployed as a hull-mounted transducer or a towed towfish and is prized for its efficiency in imaging large areas of seabed texture, objects, and shadows.

Operating Principles

The transducer array emits sound waves on both sides of the survey track, sweeping the seafloor like a flashlight beam. Hard objects (rock outcrops, wrecks) return strong echoes and appear dark, while soft sediments (mud, sand) yield weak echoes and appear light. Frequency selection balances swath width and resolution:

• Lower frequencies (50–100 kHz) cover wide areas at lower detail.

• Higher frequencies (500 kHz–1 MHz) image narrow swaths with fine resolution

Key Equipment

• Towfish or hull-mounted transducer array.

• Integrated navigation: GNSS positioning and inertial measurement unit (IMU) .

• Data acquisition system with real-time display and recording.

Early units used single conical-beam transducers; modern systems employ dual fan-shaped arrays for full side coverage and improved imaging performance. Survey Design.

1. Define objectives (e.g., wreck detection, habitat mapping, pipeline inspection) to set resolution and swath geometry.

2. Plan parallel transects with adequate overlap based on towfish altitude and chosen frequency.

3. Maintain steady vessel speed and constant towfish depth for uniform insonification.

4. Acquire calibration lines over known targets to verify system accuracy.

Side Scan Sonar Survey company in Jehanabad, Bihar.Active acoustic imaging technique that generates seafloor Map

Side Scan Sonar Survey company in Jehanabad, Bihar.Marine archaeology,shipwreck discovery,Benthic habitat mapping,environmental monitoring,Pipeline and subsea cable inspection, Fisheries research and dredging operations,Coastal structure evaluation and monitoring

Application: Side Scan Sonar Survey company in Jehanabad, Bihar.Active acoustic imaging technique that generates detailed grayscale “sonograms” of the seafloor Map,

Applications

- Marine archaeology and shipwreck discovery.

- Benthic habitat mapping and environmental monitoring.

- Pipeline and subsea cable inspection.

- Fisheries research and dredging operations.

- Coastal structure evaluation and monitoring.

- Mine countermeasures and search-and-recovery tasks.