Edgetech 4205 Tri-Frequency Motion Tolerant Side Scan Sonar System

The Next-Generation Standard for Versatile Offshore Survey Operations

Product Overview 

The EdgeTech 4205 is an advanced, versatile side scan sonar system engineered to meet the demands of nearly any survey application, from shallow coastal work to deep-water offshore operations down to 2,000 meters. Utilizing EdgeTech’s legendary Full Spectrum® CHIRP technology, the 4205 provides high-resolution imagery at ranges up to 50% greater than conventional non-CHIRP systems, significantly increasing survey efficiency and reducing operational costs.

The 4205 is available in two distinct configurations: a Tri-Frequency version for maximum frequency flexibility, and a Motion Tolerant / Multi-Pulse version designed for high-speed towing and operation in adverse sea states. With its rugged stainless steel construction and increased power for third-party sensor integration, the 4205 is the premier workhorse for professional hydrographic, search and recovery, and geohazard surveys.

Why Choose the EdgeTech 4205?

• Tri-Frequency Versatility: The tri-frequency model allows surveyors to select any two frequencies to operate simultaneously. For example, use 230/540 kHz for long-range searches and instantly switch to 540/850 kHz for high-resolution target identification without recovering the towfish.
• Superior Motion Tolerance: The Multi-Pulse (MP) configuration allows the system to maintain high-quality imagery even at faster survey speeds or in turbulent weather conditions that would typically cause "motion blurring" or striping in standard sonars.
• Full Spectrum® CHIRP Imagery: Delivers ultra-crisp seafloor visualization with millimetric resolution across the track, ensuring even the smallest targets are detected at maximum range.
• Improved Positioning Integrity: Features a new, high-accuracy internal heading sensor as standard. The system is also pre-configured to interface with optional USBL beacons, depth sensors, and magnetometers for precise target georeferencing.
• High-Power Sensor Hub: The 4205 provides increased towfish power and bi-directional communication ports to support a wider range of third-party sensors, acting as a central hub for complex subsea sensor suites.