Raymarine B175M (A80049) is a 1kW single-channel Medium-band CHIRP bronze thru-hull transducer featuring a fixed internal 20° tilted ceramic element. Engineered specifically for steep deadrise hulls (16° to 24°), the internal tilt compensates for aggressive hull deadrise angles to project the sonar beam vertically downward without requiring an external fairing block. Its low-profile housing sits virtually flush against the hull, eliminating drag and water turbulence for clean sonar performance at high speeds. Operating across Medium CHIRP frequencies (80 kHz to 130 kHz) with a 24° to 16° beam width, the B175M delivers an optimal balance of depth penetration down to 1,500 ft and broad coverage under the vessel for detailed bottom tracking and fish targeting.