The Simrad S3100 Sonar Module is a modern high-performance digital sonar (echo sounder) processing unit used in professional fishing and advanced marine navigation systems.
It is part of SIMRAD’s advanced CHIRP sonar ecosystem, designed to provide high-resolution underwater imaging, fish detection, and multi-frequency depth tracking.
The S3100 works by:
- Processing signals from external transducers
- Sending and receiving CHIRP sonar pulses
- Converting echoes into:
- Depth data
- Fish targets
- Seabed structure images
👉 It is not a standalone echo sounder, but a sonar processing module that works with SIMRAD displays (NSO / NSS / NSX systems).





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