B175L BB TH faired 20 deg

The Raymarine B175L BB TH faired 20° is a CHIRP through-hull transducer (Thru-Hull) with low CHIRP frequency, designed by Airmar. It is optimized for deep-water detection and target discrimination, particularly for Raymarine CHIRP fishfinder systems.

The B175L transducer operates in a low-frequency range, from 40 to 60 kHz. This frequency band is ideal for deep penetration and fish finding in deep water columns.

The 20-degree profiled element is specifically designed to compensate for the deadrise angle (hull inclination) of your boat's hull. This ensures the sonar beam is directed vertically toward the seabed, even if the hull is tilted, thereby guaranteeing maximum accuracy in readings.

The Raymarine B175L depth sounder has a power output of 1 kW (kilowatt) RMS, providing excellent penetration and detection capabilities in deep water.

CHIRP (Compressed High-Intensity Radiated Pulse) technology emits a continuous sweep of frequencies rather than a single fixed frequency. This significantly improves target resolution, echo separation, and overall sonar image clarity compared to traditional single-frequency sounders.

Thanks to its low frequency and 1 kW power output, the B175L depth sounder can detect depths up to approximately 1000 meters (3300 feet). Actual performance may vary depending on water conditions and the sounder used.

The beam angle of the B175L is variable depending on the frequency. At 40 kHz, it can reach up to 32x21 degrees, providing extended coverage beneath the vessel, which is useful for locating structures and fish schools.

Yes, absolutely. Its low-frequency design (40-60 kHz) and 1 kW power output make it particularly effective and high-performance for detecting fish and structures in very deep water.

The main difference lies in the operating frequency range:

The B175L uses a low frequency (40–60 kHz) for maximum deep-water penetration.

The B175M uses a mid frequency (typically 85–135 kHz) for a good balance between depth and detail.

The B175H uses a high frequency (typically 150–250 kHz) for fine detail and detection in shallower waters.

Yes, Airmar B175L transducers are equipped with an integrated water temperature sensor, allowing your fishfinder system to display this essential data.

The B175L transducer is compatible with Raymarine multifunction chartplotters equipped with integrated or external CHIRP sounder modules. This includes notably the Axiom and Element HV/RV series when paired with compatible CHIRP sounder modules.

To fully utilize the CHIRP capabilities of the B175L, external CHIRP fishfinder modules such as the Raymarine CP470 or CP570 are required if your Raymarine chartplotter does not have an integrated CHIRP module.

This is a through-hull transducer, meaning it requires a hole to be drilled through the boat's hull for installation. This installation type provides the best performance by minimizing turbulence.

This depth sounder is specifically designed for hulls with a deadrise angle (dead rise) between 16 and 24 degrees. The 20° angled element compensates for this angle to provide a vertical beam.

For installation of the B175L transducer, a hole diameter of approximately 95 to 98 mm (about 3.75 to 3.875 inches) is typically required in the hull. It is always recommended to consult the Airmar installation manual for exact specifications before drilling.

The 20-degree tilted element of the transducer is designed to compensate for the hull’s deadrise angle. When the transducer is installed correctly according to the manufacturer’s instructions for the specified deadrise angle (16-24 degrees), the sonar beam will automatically be directed vertically downward toward the bottom without additional adjustment.

Yes, it is imperative to seal the installation of the B175L depth sounder with appropriate marine sealant to ensure watertightness and prevent any water infiltration into the boat's hull. Strictly follow the manufacturer's instructions for sealing to guarantee the safety and durability of the installation.