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Raymarine B175 Chirp 1kW Thru-Hull 12 Degree Pair

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Product Description

CHIRP Fishfinders transmit across a wide frequency band instead of using a single frequency. This is also known as “Frequency Modulation” or “Spread-Spectrum” Transmissions. These waveforms are typically of long duration and for example may start at 42 kHz and end at 65 kHz. Energy transmitted into the water can be 10 to 50 times greater than a traditional fishfinder. By storing the shape of the transmitted waveform in memory and comparing it to the received echoes using pattern matching techniques (also called pulse compression), it is possible to find targets within the noise and precisely determine their range with astounding accuracy.

  • Extreme target detail and image resolution at all depths
  • Precise separation between baitfish and gamefish
  • Bottom discrimination of fish laying on the seabed
  • Deep sounding accuracy down to 3,000 m (10,000’)
  • Ability to detect targets at greater depths & higher speeds
  • Ability to find targets within the noise (“snow” on the display)


  • Low-Frequency Options (LF): 28 kHz to 75 kHz
  • Medium-Frequency Options (MF): 80 kHz to 135 kHz
  • High-Frequency Options (HF): 130 kHz to 210 kHz


  • LF: 12° to 25°, MF: 11° to 16°, & HF: 5° to 10°

* Frequency band and beamwidth vary with model—see specific model for details.

  • B175 0 Degree Transducer (selected low, medium or high freq option)
  • Install Instructions

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