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Airmar R509-LH




This is for the serious fisherman, with 2kW high chirp and 3kW low chirp covers all you need for shallow to deep water fishing. The details these show is superior as it will show individual fish not just a blob in deep water so you have a better idea what you are looking at.

Fits the Garmin GSD26 or can be used with the Furuno FCV295 and FCV1150 sounders.
We have mounted these on trailer boats (some hull modification maybe required ) and launches with great results.


  • Depth and fast-response water-temperature sensor
  • Low CHIRPS from 28 kHz to 60 kHz
  • 23° to 9° port-starboard beam width (11° to 5° fore-aft beam width)
  • High CHIRPS from 130 kHz to 210 kHz 8° to 4° beam width
  • 112 kHz of total bandwidth from one transducer
  • Covers popular fishing frequencies of 28, 38, 50, and 200 kHz plus everything else in the bandwidth
  • Fishing profile - commercial and recreational inshore and offshore fishing (deep-water canyon and sea-mount tracking)
  • Epoxy transducer housing with High-Performance Fairing
  • Boat Size: 12 m (40') and above
  • Hull Type: Fiberglass, wood, or metal
  • R509LH (Low & High-Frequency)

What is Chirp?

Traditional marine fishfinders operate at discrete frequencies such as 50 kHz and 200 kHz, use relatively short-duration transmit pulses, and use narrowband sonar transducers. In contrast, CHIRP (compressed high-intensity radar pulse) uses a precise sweep pattern of many frequencies within a long-duration transmit pulse from a broadband transducer, so the equivalent sound energy transmitted into the water is 10 to 1,000 times greater than a conventional marine fishfinder. 

The echo energy returning to the transducer, superior to that generated by a conventional transducer, is then processed by the fishfinder's DSP (digital signal processing) computer and displayed in ultra-sharp detail on the display. The combination of CHIRP, a broadband transducer, and the fishfinder's DSP, results in dramatically better fish and bottom detection, superior depth capability, and significantly better performance at speed.

SKU: TD R509 TAG: Garmin Transducers

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