Garmin

Garmin GT20TM Transom Mount 4pin

£109.99
Tax included. Shipping calculated at checkout.
010-01960-00
The Garmin GT20-TM is an all-in-one transom-mount transducer combining traditional sonar with Garmin ClearVu scanning sonar, optimised for clear, picture-like images at shallow depths. It includes a built-in temperature sensor and uses a 4-pin connector.

Available for collection or delivery in ~2 days

Pickup available at Mercury Yacht Harbour

Usually ready in 2-4 days

Description

The Garmin GT20-TM pairs traditional 77/200 kHz sonar with Garmin ClearVu scanning sonar in a single transom-mount transducer, tuned to deliver clear, picture-like images of what lies beneath the boat. ClearVu at 455 and 800 kHz renders structure and bottom detail crisply, while the traditional channel provides reliable depth and fish marking.

Optimised for clearer images at shallow depths, the GT20-TM runs 500 W on both traditional and ClearVu, reading to 579 m (1,900 ft.) on traditional sonar and 229 m (750 ft.) on ClearVu. A fast-response temperature sensor is built in, and the 4-pin connector matches Garmin chartplotters with a 4-pin sonar port such as the ECHOMAP UHD2 cv series, for which it is the bundled transducer.

PRODUCT DETAILS

  • All-in-one transom-mount transducer with traditional and Garmin ClearVu sonar
  • Optimised for clear, picture-like images at shallow depths
  • Traditional 77/200 kHz plus ClearVu CHIRP at 455 and 800 kHz
  • Transmit power of 500 W traditional and 500 W ClearVu (RMS)
  • Reads to 579 m (1,900 ft.) traditional and 229 m (750 ft.) ClearVu
  • Built-in fast-response water temperature sensor
  • 4-pin connector with a 6 m (20 ft.) cable
  • GT20-TM transom-mount transducer with 6 m (20 ft.) cable
  • Transom mounting bracket and hardware
  • Cable-entry cover and fixings
  • Installation instructions

No exploded diagram available for this product.

No compatible transducers listed for this product.

No spares or accessories listed for this product.

General

Transducer typeAll-in-one transom-mount transducer providing Garmin ClearVu scanning sonar and traditional sonar, optimised for clearer images at shallow depths

Sonar

Sonar technologiesTraditional sonar and Garmin ClearVu CHIRP scanning sonar
Traditional frequency77/200 kHz
ClearVu frequenciesCHIRP 455 kHz (435 to 475 kHz) and 800 kHz (800 to 840 kHz)
Transmit power (RMS)Traditional: 500 W; Garmin ClearVu: 500 W
Maximum depth (traditional)579 m (1,900 ft.)
Maximum range (ClearVu)229 m (750 ft.)

Beam

Beam width (traditional)45/15 degrees (low/high frequency, -3 dB)
Beam width (ClearVu)2.5 x 53 degrees at 455 kHz; 1.6 x 29 degrees at 800 kHz

Mounting

Mount typeTransom mount
Supported transom angles0 to 70 degrees
Built-in temperature sensorYes, with depth, speed and temperature support (D, T)

Connectivity

Connector4-pin Garmin transducer connector
Cable length6 m (20 ft.)

Compatibility

Compatible chartplotters and soundersCompatible with Garmin chartplotters and fishfinders that support traditional and ClearVu sonar, including STRIKER and ECHOMAP UHD2 series. The 4-pin version pairs with 4-pin sonar ports; some pairings require a Garmin adapter cable (sold separately)
Factory bundlesSupplied as the included transducer with ECHOMAP UHD2 52cv and 72cv bundles

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What sonar types does the GT20-TM support?
It combines traditional sonar (77/200 kHz) with Garmin ClearVu scanning sonar (455 and 800 kHz), giving both reliable depth and fish marking and clear, picture-like views of structure below the boat. It does not include SideVu.
What is the GT20-TM optimised for?
It is optimised for clearer images at shallow depths, making it a good all-round transducer for inshore and freshwater fishing.
How deep can the GT20-TM read?
Traditional sonar reaches 579 m (1,900 ft.) and ClearVu reaches 229 m (750 ft.), depending on water conditions and the chartplotter model.
What connector does the GT20-TM use?
This version uses a 4-pin Garmin transducer connector with a 6 m (20 ft.) cable, matching chartplotters with a 4-pin sonar port. Some pairings require a Garmin adapter cable, sold separately.
Which Garmin chartplotters is the GT20-TM bundled with?
It is the transducer supplied with the ECHOMAP UHD2 52cv and 72cv bundles, and it works with other Garmin chartplotters that support traditional and ClearVu sonar.