Side Scan Sonar: 4700 High Speed Long Range

The 4700 is an advanced high speed, high resolution, long range side scan sonar system. The system utilizes EdgeTech’s proprietary Multi-Pulse technology to place up to four coded pulses into the water at the same time, compared to one pulse for conventional side scan systems. This translates into a four times increase in survey speeds while still maintaining 100% bottom coverage or a four times increase in hits on the target for improved imaging at standard survey speeds.

In addition to Multi-Pulse technology, the 4700 also utilizes dynamically focused transducers which provide enhanced high resolution imagery at long range. These transducers are comprised of multiple, individually accessible elements which change the effective shape of the array during the receive cycle. This provides an along track beam width substantially less than the physical array length. The full array length can then be exploited at long ranges to provide extremely small beam angles of 0.1 degrees for superior long-range resolution.

Combine the Multi-Pulse technology for speed, and dynamically focused transducers for resolution, and you meet or exceed the specifications of a multi-beam side scan sonar. This is achieved without some of the limitations of multi-beam side scan such as degraded images in turns.

The 4700 comes with a 300/600 kHz dual frequency towfish. The 300 kHz frequency is a standard single pulse frequency which can be used for long range search capability. The 600 kHz frequency utilizes Multi-Pulse and dynamically focused transducers for very high resolution imagery at long range/high speed. The system comes standard with a towfish, rack mount topside processor and customer-specified length of tow cable for operation in up to 300m of water.

• Enhanced resolution at long range
• High speed data collection
• Four times as many hits on a target compared to multi-beam systems
• Flexible system design allows for operation in towed, AUV or ROV deployment
• Dual Frequency

• Cable and Pipeline Surveys
• Geological/Geophysical Surveys
• High Speed/High Resolution Surveys
• Hydrographic Surveys
• Pre/Post Dredging Surveys

4700 Brochure