Garmin
Garmin Airmar R109M Transducer
£4,120.00
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010-12809-20
The Garmin R109LM is a 2 kW broadband CHIRP thru-hull transducer combining a 38-75 kHz low band with an 80-130 kHz medium band. Its 16-element array balances deep-water reach and mid-water detail, and pairs with the Garmin GSD 26 sonar module.
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Collection or delivery in 1-2 weeks
Pickup available at Mercury Yacht Harbour
Usually ready in 2-4 days
Description
The Garmin R109LM is a high-power CHIRP thru-hull transducer that pairs a low band of 38 to 75 kHz with a medium band of 80 to 130 kHz, giving 87 kHz of total bandwidth from one 16-element broadband ceramic array. The medium channel sits between low and high frequency operation, sounding deeper than a high-frequency transducer while returning better resolution and a wider beam than the low band alone.
With 2 kW of transmit power the low band sounds to 6,000 ft and the medium band to 3,000 ft. The narrow low beam and the medium beam combine deep-water reach with broad coverage beneath the boat. The urethane housing installs as an external thru-hull with a High-Performance Fairing and suits fibreglass, wood or metal hulls up to 22 degrees deadrise on vessels of 12 m and above. An integral depth and fast-response temperature sensor is included. The transducer terminates in bare wires and requires the Garmin GSD 26 CHIRP sonar module, which connects to networked GPSMAP chartplotters.
PRODUCT DETAILS
- Broadband CHIRP transducer sweeping 38-75 kHz (low) and 80-130 kHz (medium) for the best balance of depth and resolution
- 2 kW of transmit power with 87 kHz of total bandwidth from a single 16-element ceramic array
- Low band sounds to 6,000 ft; medium band reaches 3,000 ft with wider coverage and crisp mid-water detail
- Narrow low beam (19-10 deg) and medium beam (13-8 deg) for strong deep-water performance
- External thru-hull mount with High-Performance Fairing, for fibreglass, wood or metal hulls up to 22 deg deadrise on boats 12 m (40 ft) and above
- Integral depth and fast-response water-temperature sensor
- Requires the Garmin GSD 26 CHIRP sonar module and connects to networked GPSMAP chartplotters
- R109LM thru-hull transducer with 49 ft (15 m) bare-wire cable
- High-Performance Fairing
- Installation instructions
No exploded diagram available for this product.
No compatible transducers listed for this product.
No spares or accessories listed for this product.
Sonar
| Sonar type | Broadband CHIRP, dual-band Low and Medium |
| Frequency – Low band | 38 to 75 kHz |
| Frequency – Medium band | 80 to 130 kHz |
| Total bandwidth | 87 kHz from one transducer |
| Transmit power | 2 kW |
| Maximum depth | Low band to 1,829 m (6,000 ft); medium band to 914 m (3,000 ft) |
Beam
| Beamwidth – Low band | 19 to 10 degrees port-starboard, 10 to 5 degrees fore-aft |
| Beamwidth – Medium band | 13 to 8 degrees |
Mounting
| Mount type | Thru-hull, external mount with High-Performance Fairing |
| Supported deadrise | Hulls up to 22 degrees deadrise (Garmin / dealer list 0 to 25 degrees with fairing) |
| Recommended boat size | 12 m (40 ft) and above |
| Hull / engine suitability | Fibreglass, wood or metal hulls; inboard, outboard or I/O engines |
Physical
| Housing material | Urethane transducer housing with High-Performance Fairing |
| Element configuration | 16 internal broadband ceramic assemblies |
| Temperature sensor | Yes – depth and fast-response water-temperature sensor |
Connectivity
| Connector | Bare wires (terminates to the Garmin GSD 26 sonar module) |
| Cable length | 49 ft (15 m) |
Compatibility
| Sonar module required | Requires the Garmin GSD 26 CHIRP sonar module (R109 high-power family). Connects to networked GPSMAP chartplotters via the Garmin Marine Network. |
General
| In the box | R109LM thru-hull transducer with 49 ft (15 m) bare-wire cable, High-Performance Fairing and installation instructions |
No videos available for this product.
Is the R109LM a Low-Medium or Low-High transducer?
It is a Low-Medium (LM) CHIRP transducer, covering 38 to 75 kHz on the low channel and 80 to 130 kHz on the medium channel. The medium band balances depth and resolution with a wider beam than a high-frequency model.
Does the R109LM need a sonar module?
Yes. It is a 2 kW bare-wire CHIRP transducer that requires the Garmin GSD 26 CHIRP sonar module, which connects to networked GPSMAP chartplotters.
How deep can the R109LM sound?
The low band reaches approximately 6,000 ft and the medium band approximately 3,000 ft, depending on water conditions.
How is the R109LM mounted?
It is an external thru-hull transducer fitted with a High-Performance Fairing, for fibreglass, wood or metal hulls up to 22 degrees deadrise on boats of 12 m (40 ft) and above.
Does the R109LM read water temperature?
Yes. It includes an integral depth reading and a fast-response water-temperature sensor.
