Garmin GSD 25 Premium Sonar Module

Garmin GSD 25 | Premium 1kW Network Sounder

Garmin GSD 25 addresses the requirement for integrated sonar versatility by combining 1kW dual-channel CHIRP with high-resolution ClearVü and SideVü scanning in a single black box. By utilizing a high-speed digital signal processor, the system mitigates the need for multiple modules, providing a unified view of the water column and surrounding structure. This architectural focus ensures that offshore navigators can maintain a tactical view of both deep-water targets and lateral structural transitions, preventing navigational blindness in complex canyon environments.

During installation, the GSD 25 requires a high-bandwidth Ethernet connection to a compatible GPSMAP display to render its multi-mode sonar streams. It is vital to ensure the transducer selection matches the unit’s 1kW CHIRP capacity to leverage the full RezBoost-style signal enhancement. System performance relies on power stability; don’t undersize the power cables for long runs, as voltage drops can trigger signal “ghosting” where the digital processor interprets electrical noise as false fish targets in the high-gain water column.

Technical Specifications

• Type: Premium 1kW dual-channel network sounder.
• Sonar: Traditional CHIRP, ClearVü, and SideVü support.
• Networking: Garmin Marine Network (Ethernet) output.
• Interface: Auto-detection with GPSMAP 7400/7600/8000 series.
• Power: 1kW RMS digital sounder engine.
• Features: Advanced target separation and bottom discrimination.
• Protection: Ruggedized, waterproof IPX7 external chassis.