EdgeTech 4205: Multi-Pulse/Motion Tolerant (MP/MT) Side Scan Sonar
The next generation 4205 is a versatile side scan sonar system that can be configured for almost any survey application from shallow to deep water operations. The 4205 utilizes EdgeTech’s Full Spectrum® CHIRP technology to provide crisp, high resolution imagery at ranges up to 50% greater than non-CHIRP systems; thus allowing customers to cover larger areas and save money spent on costly surveys.
Product Description
EdgeTech 4205 Multi-Pulse/Motion Tolerant (MP/MT)
The EdgeTech 4205 Multi-Pulse/Motion Tolerant (MP/MT) Side Scan Sonar is a state-of-the-art sonar system designed for a wide range of marine survey and underwater imaging applications, offering exceptional flexibility, resolution, and range. Engineered with EdgeTech’s advanced Full Spectrum® CHIRP technology, the 4205 delivers crisp, high-resolution imagery of the seafloor with improved range and target detection capabilities, even in challenging environments.
What sets the 4205 apart is its tri-frequency capability, allowing operators to choose from three simultaneous or interchangeable operating frequencies to optimize performance for specific missions. Common configurations include 230/540/850 kHz or 300/600/900 kHz, offering a balance of long-range detection and ultra-fine detail depending on the frequency used.
Ideal for marine construction, pipeline inspection, UXO detection, archaeological surveys, and search & recovery operations, the EdgeTech 4205 provides unmatched versatility in a single, lightweight towfish package. The system includes a digital telemetry system, a user-friendly topside interface, and Towfish control software that allows operators to adjust sonar settings in real time for optimal data quality.
Key Features:
-
Tri-frequency operation (e.g., 230/540/850 kHz or 300/600/900 kHz)
-
Advanced CHIRP technology for greater range and resolution
-
High-speed data acquisition with real-time sonar imagery
-
Lightweight, robust towfish for easy deployment
-
Rugged topside processor with intuitive software interface
-
Range settings up to 200 meters per side, depending on frequency
-
Optional integration with USBL positioning, depth, and altitude sensors
Whether mapping seafloor features, locating objects, or conducting detailed inspections, the EdgeTech 4205 delivers the clarity and reliability professionals demand in subsea imaging.
Contact ECHO81 today to learn more about the EdgeTech 4205 or to schedule a rental for your next marine survey project.

Factsheet: EdgeTech 4205
Manual: EdgeTech 4205
CONTACT INFO
Have a question? Can’t find what you’re looking for? We’d love to hear from you!
Connect with us using the information below.
PHONE
+1 706-522-3022
ADDRESS
481 S. Jackson Street
Hartwell, GA 30643
Hartwell, GA 30643
At ECHO81, we believe in the power of collaboration and are proud to work alongside a network of exceptional partners who share our commitment to excellence. We work with EdgeTech, Kongsberg, Applanix, AML Oceanographic, and many more.
We are always looking for new ways to grow and improve. If you have any questions, feedback, or would like to learn more about how ECHO81 can assist you, please don’t hesitate to Contact Us




SEABER YUCO-CTD AUV
SEABER AML Sensor
Innomar ISE Processing Software (Rental)
EdgeTech 6205s2 Multibeam Sonar With 19" RM Integrated With Applanix POSMV SurfMaster
QPS FMGeocoder
QPS Qimera 2
EdgeTech 3400 Dual 216 Subbottom Profiler Towfish With Pole Mount Adapter
Applanix GNSS antenna, 540AP
QPS TTL/ZDA Splitterbox MK3 (8-way) 19" Rack Mount
EdgeTech Laptop
Kongsberg cNODE Micro 31-180 Beacon
EdgeTech Starmux IV Interface
SeaGear Oceanographic Winch (Rental)
EdgeTech 4205 Tri-Frequency Side Scan Sonar
EdgeTech 3400-OTS Ultra-Lightweight Pole-Mount Subbottom Profiler (4-24 kHz)
Innomar Compact Subbottom Profiler
iXblue GAPS M5 USBL (Rental)
EdgeTech 3400-OTS Low Freq Digital Subbottom Profiler Dual Transmitters
Impact Subsea ISS360HD
EdgeTech 3400-OTS (2-16 kHz or 4-24 kHz) Subbottom Profiler (Rental)
Trimble SPS851 DGPS Receiver
QPS Fledermaus 8
Kongsberg EM 2040 MKII Multibeam Echosounder
Impact Subsea ISFMD System Full System
Innomar Deep-36 Subbottom Profiler
Applanix POSPac MMS SmartBase (Rental)
EdgeTech 3400-OTS Lightweight Sonar Head (2-16 kHz) Subbottom Profiler
EdgeTech 2205 Tri-Frequency Side Scan Sonar & Subbottom Profiler
EdgeTech 4125i Dual Frequency Side Scan Sonar (Rental)
EdgeTech ASSY Top 3400 Subbottom Profiler Pole Mounted Sonar Head
EdgeTech 4125i Side Scan Sonar Depressor Wing Kit
Impact Subsea ISD4000 (Rental)
Kongsberg EM 2040P MKII Multibeam Echosounder
EdgeTech 4205 Side Scan Sonar Depressor Wing (Rental)
Impact Subsea ISS360
Impact Subsea ISFMD System Software License
Innomar ROV, AUV Subbottom Profiler
Innomar Quattro Multi Transducer Subbottom Profiler
Kongsberg EA 440 Single Beam Echosounder (Rental)
HYPACK MAX & HYSWEEP (Rental)
Kongsberg cNODE MiniS 31-180 Beacon w/Pressure Sensor
Geometrics Magnetometer Telemetry MUX
Applanix RTK POS MV OceanMaster RM INS
G882 TVG Transverse Gradiometer (Rental)
USM MegaTower OTS Sonar Mount (Rental)
Applanix RTK POS MV OceanMaster SFF IP68 INS