EdgeTech 3400-OTS: Pole-Mount Sub-Bottom Profiler

High-Resolution CHIRP Stratigraphy for Shallow and Deep Water Surveys

Product Overview 

The EdgeTech 3400-OTS (Over-The-Side) is a specialized pole-mount variant of the industry-leading 3400 Series sub-bottom profilers. Utilizing EdgeTech’s proprietary Full Spectrum® CHIRP technology, the 3400-OTS delivers high-resolution images of sub-bottom stratigraphy in oceans, lakes, and rivers. This over-the-side configuration is engineered for rapid mobilization on vessels of opportunity, providing a stable, fixed-geometry alternative to traditional towed systems.

The system features an advanced multi-channel PVDF hydrophone array and a choice of transducers tailored for various mission goals—from ultra-high resolution in shallow marshes to deep penetration in offshore wind farm sites. A standout feature is the "Pipeliner" mode, which optimizes the receiver array for the specific task of locating and imaging buried pipelines and cables.

Why Choose the EdgeTech 3400-OTS?

• Calibration-Free Sediment Classification: Features real-time reflection coefficient measurements. This unique capability allows users to collect complex "analytic" data to measure sediment reflection and determine sediment type (e.g., sand, clay, silt) during the survey.
• Dual Frequency Transmission: Capable of transmitting two discrete CHIRP pulses simultaneously, allowing the operator to optimize both penetration and resolution in a single pass.
• Specialized Pipeline Mode: The segmented PVDF receiver array can be switched into a focused mode specifically designed to detect and track buried subsea assets with high precision.
• Integrated Motion Compensation: Every 3400-OTS sonar head includes internal sensors for pitch, roll, heave, and depth, ensuring that data is corrected for vessel motion in real-time, even on small boats in choppy water.
• Continuous High Ping Rate: Discrete transmit and receive channels allow for continuous data collection. This results in the high ping rates necessary for detailed construction and archaeological surveys where no gaps can be tolerated.