Airmar B75C-12-L CHIRP Low Frequency Fishfinder Transducer

The B75C CHIRP thru-hull low-profile transducers have one broadband ceramic element and a high-precision temperature sensor in a bronze housing. This version has a 12 degree tilt to compensate for hull deadrise of 8-15 degrees.

These revolutionary transducers continuously operate across a range of frequencies, rather than at the traditional dedicated frequencies of 50 kHz or 200 kHz. When transmitting at dedicated frequencies, targets that are smaller than the 50 kHz or 200 kHz sound wave may be undetected and therefore not shown on the fishfinder display. With CHIRP, the transmitted signal covers a wide band of frequencies, providing significant improvements in the ability to detect all targets in the water column. More bottom and water column area is covered as the beamwidth constantly changes from narrow to wide while the transducer is "chirped" across the specified band.

The beamwidth of the transducer signal is adjustable under the control of the sounder, and can range from 21-40 degrees in the low frequency range, 16-24 degrees in the medium range and 9-15 degrees in the high range.

CHIRP transducers are for use only with CHIRP-compliant sounders and fishfinders.

This '-L' version of the transducer chirps in the range 40-75 kHz and should be paired with an M or H model for full frequency band coverage.