GARMIN GSD-25 Advanced Sonar Module Sonar Black Box
The GARMIN GSD-25 Advanced Sonar Module is a Fishing & Sonars black-box module with dual-channel 1 kW CHIRP capability. The unit provides Garmin CHIRP DownVü and SideVü sonar scanning for installers configuring Garmin sonar hardware.
Technical Specifications
| Brand | GARMIN |
|---|---|
| Product Category | Fishing & Sonars |
| Module Class | Sonar black box |
| Sonar Channels | Dual-channel CHIRP |
| CHIRP Output | 1 kW |
| Scanning Modes | Garmin CHIRP DownVü and SideVü |
| Weight | 4 lb (1.81 kg) |
| Dimensions | 9.9 x 7.6 x 2.6 in (251.46 x 193.04 x 66.04 mm) |
Compatibility & Applications
- Fits Garmin Fishing & Sonars listings for black-box sonar hardware.
- Mounts as a sonar black box with 9.9 x 7.6 x 2.6 in dimensions.
- Pairs dual-channel CHIRP sonar with 1 kW output in one module.
- Includes Garmin CHIRP DownVü and SideVü scanning modes.
- Fits installations requiring a 4 lb Garmin sonar module.
In a Garmin black-box sonar setup, the installer can allocate a 9.9 x 7.6 x 2.6 in space for the module. Its differentiator from a CHIRP-only listing is the combined dual-channel 1 kW CHIRP, DownVü, and SideVü feature set.







