Garmin GCV 20 Scanning Sonar Black Box
Best high definition scanning upgrade for serious offshore anglers.
This module turns your existing chartplotter into a high-resolution underwater scout, offering the kind of clarity usually reserved for professional-grade setups. While it requires a bit of network configuration, the payoff is an incredibly detailed view of structure and fish that standard sonar simply cannot match.
$543.99
More GCV options
Who it's for
- Anglers seeking the highest level of underwater detail and precision
- Boaters with existing Garmin ecosystems looking for a plug-and-play upgrade
- Serious fishermen who need a complete 360-degree understanding of their environment
Who should skip it
- Budget-conscious hobbyists looking for an all-in-one affordable sonar solution
- Casual boaters who prefer simple, self-contained electronics with minimal wiring
- Owners of older marine electronics or non-Garmin hardware
Performance breakdown
Imaging Resolution
Ultra high-definition frequencies deliver near-photographic clarity of underwater structures.
Scanning Coverage
SideVü capabilities provide an expansive, wide-angle view for rapid scouting.
System Integration
Three dedicated network ports make multi-display data sharing seamless and reliable.
Target Separation
High-frequency sonar effectively distinguishes fish from dense bottom clutter.
Depth Performance
Optimized for shallow to mid-depth waters rather than deep-sea exploration.
Build Durability
IPX7 waterproof rating ensures reliable operation in harsh marine environments.
Key Specs
Dimensions
251mm x 192mm x 66mm
Weight
0.845 kg
Waterproof Rating
IPX7
Power Output
500 watts
Supported Frequencies
800 kHz, 1200 kHz
Max Depth
200 feet
Transducer Type
Transom Mount
Sonar Technology
CHIRP, Down Imaging, Side Imaging
Connectivity
Ethernet
Operating Temperature
-15°C to 70°C
Know before you buy
Still have a question?
Ask Metto anything about the Garmin GCV 20 Scanning Sonar Black Box before you decide.
