Garmin
Garmin GT12M-THF, 20 Degrees
£430.00
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Tax included.
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010-02867-02
The Garmin GT12M-THF 20 degree is a bronze thru-hull transducer delivering mid-band CHIRP traditional sonar for fibreglass, wood and composite hulls. The built-in 20 degree element flush-mounts on hulls of 17 to 24 degrees deadrise with no fairing block required.
✓
Collection or delivery in 1-2 weeks
Pickup available at Mercury Yacht Harbour
Usually ready in 2-4 days
Description
The Garmin GT12M-THF brings mid-band CHIRP traditional sonar to fibreglass, wood and composite-hulled boats in a clean flush thru-hull fitting. Operating across 85 to 165 kHz at 350 W, it produces strong target separation and clear bottom detail at depths to 365 m (1,200 ft) in freshwater and 245 m (800 ft) in saltwater. This 20 degree version has the correcting angle built into the bronze housing, so it flush-mounts on hulls with 17 to 24 degrees of deadrise without cutting a separate fairing block. A 15 m (50 ft) cable terminates in an 8-pin connector that plugs straight into a compatible Garmin chartplotter, fishfinder or sonar black box, with Garmin auto-detection configuring the sonar for you. A built-in water-temperature reading is supported on compatible displays. As a brass-bodied transducer it must not be fitted to aluminium or steel hulls.
PRODUCT DETAILS
- Mid-band CHIRP traditional sonar (85 to 165 kHz) for strong target separation and bottom detail
- 350 W transmit power reaches depths to 365 m (1,200 ft) in freshwater and 245 m (800 ft) in saltwater
- Bronze thru-hull housing for fibreglass, wood and composite hulls (not for aluminium or steel)
- 20 degree element flush-mounts on hulls with 17 to 24 degrees of deadrise, no fairing block to cut
- Built-in 8-pin connector with a 15 m (50 ft) cable for a clean run to your chartplotter or sounder
- Plugs into compatible Garmin chartplotters and fishfinders with Garmin auto-detection
- GT12M-THF thru-hull transducer (20 degree element)
- 15 m (50 ft) cable with 8-pin connector
- Nylon washer and hull nut
- Documentation
No exploded diagram available for this product.
No compatible transducers listed for this product.
No spares or accessories listed for this product.
No compatible products found.
Sonar
| Sonar type | Mid-band CHIRP traditional sonar (single channel) |
| Frequency | 85 to 165 kHz (dependent upon the chartplotter, fishfinder or sounder) |
| Transmit power | 350 W |
| Maximum depth | Freshwater 365 m (1,200 ft); saltwater 245 m (800 ft), dependent upon water conditions |
Beam
| Beamwidth | 24 to 16 degrees |
Mounting
| Mount type | Thru-hull, flush, with deadrise angle built into the housing (no separate fairing block required) |
| Deadrise (this variant) | 20 degree element, for hull deadrise 17 to 24 degrees |
| Compatible hull materials | Fibreglass, wood, composite only. Must not be installed in aluminium or steel hulls (brass housing causes galvanic corrosion) |
| Hole saw required | 73 mm (2 7/8 in) for solid or cored fibreglass |
| Anti-fouling | Apply water-based anti-fouling paint every six months; never use ketone-based paint |
Physical
| Housing material | Bronze |
| Weight | 2.6 kg (5.7 lb) |
| Dimensions | Thread diameter 70 mm (2.76 in); flange diameter 94 mm (3.70 in); height 146 mm (5.75 in) |
| Operating temperature | 0 to 50 C (32 to 122 F) |
| Storage temperature | -40 to 70 C (-40 to 158 F) |
Connectivity
| Connector | 8-pin |
| Cable length | 15 m (50 ft) |
Compatibility
| Compatible devices | Connects to a Garmin chartplotter, fishfinder or sonar black box with an 8-pin sonar port; performance dependent upon the chartplotter, fishfinder or sounder model. A Garmin chartplotter software update is required at installation. |
General
| In the box | GT12M-THF thru-hull transducer (20 degree) with 15 m cable, nylon washer and hull nut, documentation |
No videos available for this product.
Which hull types can the GT12M-THF be fitted to?
It has a bronze (brass) housing suitable for fibreglass, wood and composite hulls. It must not be installed in an aluminium or steel hull, as the brass would cause galvanic corrosion and could allow water entry around the transducer.
Do I need a fairing block with this transducer?
No. The deadrise correction is built into the housing. This 20 degree version suits hulls with 17 to 24 degrees of deadrise. You simply point the arrow on the top to the keel so the internal angle aligns with the hull.
What sonar does the GT12M-THF provide?
It is a mid-band CHIRP traditional transducer covering 85 to 165 kHz at 350 W. It produces the traditional fish-arch and bottom view and supports a water-temperature reading on compatible displays. It does not provide ClearVu or SideVu scanning sonar.
How deep will it read?
Maximum depth is 365 m (1,200 ft) in freshwater and 245 m (800 ft) in saltwater, depending on water conditions, bottom type and the connected display.
How does it connect to my chartplotter?
It has an 8-pin connector on a 15 m (50 ft) cable that plugs into a compatible Garmin chartplotter, fishfinder or sonar black box. Garmin auto-detection configures the sonar automatically. Update your chartplotter software when you install it.
