The Raymarine B175M is a bronze thru-hull CHIRP transducer built for serious fishing applications. Operating across a medium-frequency CHIRP bandwidth of 85–135 kHz at 1kW, it delivers bottom detection down to 3,000 m (10,000 ft) with up to 5–10 times greater detail and resolution than conventional sonar — precise enough to separate individual baitfish from game fish and underwater structure. The 20° tilted element design allows proper beam orientation on deadrise hulls, and the broadband architecture delivers up to 80 kHz of total bandwidth through a single installation.

Specifications:

• Model: B175M
• Material: Bronze
• Power: 1 kW
• Technology: CHIRP
• Frequency Range: Medium — 85–135 kHz
• Total Bandwidth: Up to 80 kHz
• Tilt Angle: 20°
• Mount Type: Thru-hull
• Maximum Depth: 3,000 m (10,000 ft)
• Resolution Improvement: 5–10× over conventional sonar