Garmin GT12M-THF
Garmin GT12M-THF
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Garmin GT12M-THF
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“I upgraded to the Garmin GT56UHD and the clarity is unbelievable. You can literally see fish moving around structure. Hard Rig Marine helped me pick the right setup and it’s been spot on since day one.”
Michael R. — Cairns, QLD -
“I’m not a tech person, but the team made it super easy to install my GT54UHD transducer. Works perfectly with my ECHOMAP — I’ve never had sonar this clear in the estuary before!”
Jenny L. — Mandurah, WA -
“The Airmar B175M changed my whole deep drop setup. Way better definition and stability compared to my old transducer. You get what you pay for — and these guys know their stuff.”
Ben T. — Newcastle, NSW
GARMIN GT12M-THF (0°): 350W Mid-Band CHIRP Thru-Hull Transducer
The Garmin GT12M-THF (0° tilt) is a specialized, **flush-mounted thru-hull transducer** designed for cruising and fishing boats requiring optimal traditional sonar performance and minimal drag. This 8-pin bronze unit features **350 W Mid-Band CHIRP Traditional Sonar (85–165 kHz)**, providing superior target separation and clarity. It delivers reliable depth returns down to **240 meters (790 ft) in saltwater** and **365 meters (1,200 ft) in freshwater**. The **0-degree tilt version** is specifically designed for hulls with minimal deadrise (0°–7°).
MID-BAND CHIRP PERFORMANCE & BRONZE HOUSING
This transducer is built with a durable bronze housing and utilizes Mid-Band CHIRP for an optimum balance of depth penetration and wide coverage area.
KEY SONAR & INSTALLATION FEATURES
- High Transmit Power: **350 W power output** ensures reliable signal return, reaching 240m in saltwater.
- Broad Frequency Range: The Mid-Band CHIRP (85–165 kHz) pulses a wide coverage area (16°–24° beamwidths).
- Flush Mount Design: Thru-hull installation offers flush mounting for **minimum drag** and optimum beam orientation.
- Auto-ID Technology: Enjoy simple plug-and-play operation with compatible Garmin MFDs.
INSTALLATION AND CONNECTIVITY
The GT12M-THF is built for robust, permanent installation on fiberglass, composite, and wood hulls (Bronze housing not recommended for aluminum).
- **8-Pin Connector:** Uses the 8-pin connector for power and traditional sonar data output.
- **Deadrise Support:** The **0° tilt version** is designed for optimal performance on hulls with deadrise angles from **0° to 7°**.
Inverell Boating Centre Expert Note:
The GT12M-THF is a reliable, high-definition traditional sonar solution (no scanning capability). The 0° tilt design is critical and **must be matched to a hull with minimal deadrise (0°–7°)** to ensure the beam points straight down. This transducer is also **RapidReturn™ Sonar compatible** for use with the GSD 28 black box.
Specification in detail
Specification in detail
General & Physical
PART NUMBER: 010-02867-00
HOUSING MATERIAL: Bronze
INSTALLATION: Thru-Hull (Flush Mount)
CABLE LENGTH: 15 metres (49.2 ft)
SUPPORTED DEADRISE: 0° to 7° (0° Tilt)
INCLUDES: Installation Hardware
Sonar Capabilities (Traditional Only)
NUMBER OF PINS: 8-pin
SONAR TYPE: Traditional CHIRP (Mid-Band)
TRADITIONAL POWER: 350 W
MAXIMUM DEPTH (SALTWATER): 240 m (790 ft)
MAXIMUM DEPTH (FRESHWATER): 365 m (1,200 ft)
FREQUENCY: 85–165 kHz
BEAMWIDTH: 24°–16°
RAPIDRETURN™ SONAR COMPATIBLE: Yes
Inverell Boating Centre Technical Summary: The GT12M-THF (0°) is an excellent 350W traditional sonar solution for mid-size boats, offering Mid-Band CHIRP across a wide beam. The bronze housing is ideal for fiberglass/wood hulls, and the 0° tilt design ensures minimal drag and clear returns on hulls with minimal deadrise.
Warranty / Availability of Repair Facilities & Parts
Warranty / Availability of Repair Facilities & Parts
AU Warranty / Availability of Repair Facilities & Parts
Garmin Warranty / Availability of Repair Facilities & Parts
On this page, Garmin customers in Australia will find detailed warranty information; information regarding availability of repair facilities and parts including for out-of-warranty service; other important details regarding repair or replacement of a Garmin product; and how to contact Inverell Boating Centre for further information.
On this page
- Limited Warranty
- Availability of Repair Facilities & Parts (Out of Warranty)
- Repair or Replacement of a Garmin Product
- Additional Resources
- Contact for Further Information
Limited Warranty
This warranty is provided by Garmin Australasia Pty Ltd.
Application of Australian Consumer Guarantees
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if they fail to be of acceptable quality and the failure does not amount to a major failure.
The benefits under this Limited Warranty are in addition to other rights and remedies under applicable law. Phone: 0417 159 205.
One-Year Consumer Products Limited Warranty
Non-aviation products are warranted to be free from defects in materials or workmanship for one year from the date of purchase. Within this period, Garmin Australasia will, at its sole option, repair or replace any components that fail in normal use at no charge for parts or labour (customer responsible for transportation).
Warranty Exclusions
- Cosmetic damage such as scratches, nicks, and dents.
- Consumable parts (batteries, etc.) unless damage occurs due to defects in materials or workmanship.
- Damage from accident, abuse, misuse, water, fire, or external causes.
- Service by non-authorised providers.
- Modifications or altered units without written permission.
- Damage caused by non-Garmin cables or accessories.
Garmin reserves the right to refuse warranty claims for products obtained or used in contravention of local laws. Map accuracy and completeness are not guaranteed.
Warranty Process
- Contact Inverell Boating Centre Support to request an RMA number.
Email: inverellboatingcentre.cwa@gmail.com
Phone: 0417 159 205
Provide your unit serial number, return address, and contact number.
- Ship the unit with RMA number to Garmin or Inverell Boating Centre.
INVERELL BOATING CENTRE
Attn: Warranty / Returns:
10a Swanbrook Rd,
Inverell NSW 2360,
Australia
Availability of Repair Facilities & Parts (Out of Warranty)
Garmin products include complex integrated components. Repairs of parts such as cracked screens or integrated bands may not be possible outside Garmin factory conditions. Therefore, facilities or spare parts may not always be available for repair of such components.
Where an out-of-warranty service is required, Garmin Australasia or INVERELL BOATING CENTRE may offer to sell a replacement unit or Garmin Refurbished product. This applies only to out-of-warranty service and not to consumer guarantees under the Australian Consumer Law.
Repair or Replacement of a Garmin Product
Australian Consumer Law Notice:
- Repair or replacement of goods capable of retaining user data may result in loss of that data.
- Goods presented for repair may be replaced with refurbished goods of the same type rather than repaired. Refurbished parts may be used to repair goods.
Additional Resources
- Parallel imports: accc.gov.au/buying-parallel-imports
- Proof of purchase: accc.gov.au/receipts-proof-of-purchase
- Identifying genuine business: accc.gov.au/identifying-a-genuine-business
Contact for Further Information
For all warranty or out-of-warranty enquiries, please contact:
INVERELL BOATING CENTRE
www.inverellboatingcentre.com
10a Swanbrook Rd, Inverell NSW 2360, Australia
Phone: 0417 159 205

Verified Customer Feedback
Excellent
4.8
/ 5
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“I run dual Garmin units and the thru-hull transducer from Hard Rig gives me crystal bottom lock even at 25 knots. Couldn’t be happier with the setup and advice.”
Shaun K. — Townsville, QLD
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“I was worried about installing a thru-hull model, but the support from Hard Rig was awesome. The Airmar B60 works flawlessly on my fibreglass hull — depth readings are spot on.”
Emily P. — Hobart, TAS
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“Just fitted a GT15M-TM to my tinnie and I’m blown away by the detail. Picks up structure I never knew was there. Shipping was fast and everything came ready to install.”
Darren F. — Perth, WA
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