Garmin GVC20 Sonar Black Box and UHD Transducers Australian Release

Garmin has announced a Ultra High-Definition Sonar Scanning system (GCV™ 20 Scanning Sonar Black Box with GT34UHD-TM Transducer). The new sonar system delivers significantly clearer images by using a higher frequency to scan for structure and fish. Garmin has stated that detail including fish and surrounding structures will be much crisper and that this level clarity will go to 200 feet below your boat. The new Sonar system and transducers are due late April in Australia.

Price and Australian Release

010-02055-00 Ultra High-Definition Scanning Sonar System GCV™ 20 Scanning Sonar Black Box with GT34UHD-TM Transducer – Whole System (including GT34UHD-TM Transducer and GCV20 Scanning Sonar Black Box) | AUD $899RRP

010-12776-10 Garmin GT34UHD-TH – Single Thru-Hull Transducer | AUD $1199RRP

010-12776-11 Garmin GT34UHD-THP – Double Thru-Hull Transducers | AUD $1899RRP

010-12776-00 - Garmin GT34UHD-TM – Single Transom Mount Transducer | AUD $399RRP

 Ultra High-Definition Scanning Sonar System

Full System Functionality and Current Unit Compatibility

The new Sonar scanning system will work best with nearshore and inland anglers. It will be available as a standalone system compatible with all current GPSMAP and select ECHOMAP Plus multi-function displays.

Garmin has thankfully opened up the field with the new Sonar Scanning system being compatible with their older models.  The system package itself (010-02055-00) comes with the networkable GVC20 sonar black box and a GT34UHD transducer with transom and trolling motor mounts. This system is compatible with the following units:

  • ECHOMAP Plus 75cv GCV™ 20
  • ECHOMAP Plus 75sv
  • ECHOMAP Plus 95sv
  • GPSMAP 1022xsv
  • GPSMAP 1222xsv
  • GPSMAP 1222xsv Touch
  • GPSMAP 8417 MFD
  • GPSMAP 8424 MFD

The setup is pretty simple, the GVC20 Black box will connect to your MFD (Multi Function Display) via ethernet. This leaves your transducer port open meaning you keep your original transducer, and you can then select which transducer you want to use for Side Vu or Down Vu. Based on the range and the limited use for saltwater anglers it looks like the transducers included will mainly feature as an addition to your boat, not as a standalone sonar system unless you're primarily fishing inland and nearshore.

Additionally, if you plan on using this and you haven’t updated your Garmin unit in a while make sure you do so as Garmin will release a firmware update that ensures the units are compatible Garmin is set to release the update on all their current devices before the GVC20 box and GT34 transducer hit our stores.

Garmin GT30-TH

Garmin GT30-THP

Standard Garmin Transducer Left | UHD Garmin Transducer Right
Standard Garmin Transducer Left | UHD Garmin Transducer Right
Ultra High-Definition Scanning Sonar GVC20 and GT34UHD-TM Transducer Full Spec List


Physical dimensions 9.9"×7.6"×2.6" (251 mm × 192 mm × 66 mm)

1.86 lbs (845 g)

Water rating IPX7
Garmin Marine Network™ ports


Temperature range From 5°F to 158°F (from -15°C to 70°C)

Sonar Features & Specifications

Frequencies supported

Ultra High-Definition ClearVü: 0.8 MHz (800 kHz), CHIRP range: 760-880 kHz

Ultra High-Definition SideVü: 1.2 MHz (1,200 kHz), CHIRP range: 1,060-1,170 kHz

Transmit power 500 W rms
Maximum depth

200' Ultra High-Definition ClearVü

125' to each side Ultra High-Definition SideVü, 250' total

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