Unlock Superior Underwater Visibility with Advanced CHIRP Technology

Imagine gliding across open waters, your sonar screen lighting up with crystal-clear images of fish schools darting just below the surface. That's the edge the Raymarine B175MW delivers for serious anglers chasing mid-water pelagics like tuna, mahi-mahi, or kingfish. This thru-hull transducer stands out by blending medium-frequency CHIRP prowess with an ultra-wide beam, painting a broader picture of what's lurking in the upper to mid water column—without the narrow focus that leaves gaps in coverage.

Unlike traditional fixed-frequency transducers that struggle with target separation in cluttered environments, the B175MW's CHIRP-ready design sweeps across 60-100 kHz, delivering sharper echoes and finer detail. It's engineered for boats with hull deadrises up to 24 degrees, thanks to its 20-degree tilted element that aligns perfectly with your vessel's contours for optimal signal return even at planing speeds.

Key Advantages for Everyday Boaters and Tournament Pros

• Expansive Coverage: Ultra-wide beamwidth from 57° to 73° port/starboard and 16° fore/aft ensures you spot more fish over larger areas, ideal for trolling or drifting in productive zones.
• Deep Penetration: Rated for depths up to 400 meters (1,300 feet), it punches through thermoclines to reveal structure and bait balls where others fade out.
• Fast-Response Temp Sensing: Tracks water temperature changes in real-time, helping you pinpoint where species transition based on thermal layers.
• Rugged Bronze Build: Corrosion-resistant housing thrives on fiberglass or wooden hulls up to 11 meters (36 feet), handling the rigors of saltwater exposure.
• Low-Profile Design: Minimizes drag and maintains performance at speed, so you get reliable readings whether trolling slowly or running offshore.

Mastering Installation for Peak Performance

Getting the most from your B175MW starts with smart placement. Aim for a spot forward of the prop and keel, at least one-third of the hull length from the bow, where water flow stays clean. The 20-degree tilt compensates for common deadrise angles (12° to 24°), pointing the ceramic element straight down for maximum echo capture—no more signal loss from misalignment.

Drill a precise 95 mm (3-3/4 inch) hole, bed the transducer in sealant, and secure with the included hardware. Pair it with a compatible Raymarine sounder module, and leverage Xducer ID technology for plug-and-play recognition. Pro tip: Fair the housing to match your hull's curve for smoother water flow and reduced turbulence, boosting high-speed accuracy.

Real-World Performance That Outshines the Competition

Inside bait balls teeming with predators, the medium-wide beam excels at separating individual fish from the frenzy, giving you the confidence to drop lines exactly where they count. Anglers report marking billfish at 200+ feet with exceptional clarity, while the 40 kHz bandwidth minimizes noise from hull slap or wake interference.

For multi-transducer setups, it complements low-frequency deep-water probes by filling the mid-range gap—perfect for versatile offshore adventures. The urethane acoustic window withstands impacts, and operating temps from -10°C to 40°C (-14°F to 104°F) keep it reliable from tropics to cooler latitudes.

Essential Specifications at a Glance

Long-Term Reliability and Care Tips

Weigh just 2.7 kg, this transducer won't stress your hull mounting. Rinse with fresh water after every outing to fend off salt buildup, inspect the cable for chafe, and avoid antifouling paints on the face—they can dull performance. With proper upkeep, it'll serve season after season, turning casual outings into limit-filling hauls.