Raymarine B265LM Bronze CHIRP Thru-Hull Depth & Temp

Imagine gliding through choppy offshore waters, your sonar screen lighting up with crystal-clear images of fish schools hugging the structure below. That's the everyday reality for boaters equipped with the Raymarine B265LM Bronze CHIRP Thru-Hull transducer. This powerhouse isn't just another depth finder—it's a game-changer for serious anglers and navigators who demand precision from shallow reefs to deep-drop canyons.

Crafted from robust bronze for saltwater resilience, the B265LM punches through hulls with deadrise angles from 0 to 20 degrees, making it a perfect fit for fiberglass or wooden vessels. Its dual-channel CHIRP technology sweeps across low (42-65 kHz) and medium (85-135 kHz) frequencies, delivering exceptional target separation that turns fuzzy blips into identifiable bait balls and bottom contours.

Unlock Superior Sonar Performance

At 1,000 watts of power, this thru-hull sensor reaches depths up to 3,000 feet on low frequency for those epic deep-water hunts, while the medium band excels at 1,500 feet with tighter beam widths (16 to 11 degrees) for pinpoint accuracy closer to the surface. Skip the guesswork: the low element's wider 25 to 16-degree beam covers vast areas underneath your boat, ideal for scanning structure, while the medium provides razor-sharp resolution in shallows.

• Shallow Water Mastery: Medium CHIRP sweeps deliver broad coverage right under the keel, spotting wrecks and reefs without dead zones.
• Deep Water Dominance: Low-frequency power tracks pelagics and bottom fish at extreme ranges.
• High-Speed Stability: Pair it with a performance fairing, and maintain crisp returns even above 30 knots.

Real-World Applications for Boaters

Offshore trolling for tuna? The B265LM's CHIRP magic paints individual fish in the water column, helping you set lures precisely. Reef diving or wreck fishing? Its temperature sensor keeps tabs on thermoclines, revealing where gamefish stage. Even cruisers benefit from reliable bottom tracking in unfamiliar bays. Boaters rave about how it transforms vague "fish" readings into actionable intelligence, saving fuel and frustration on long runs.

What sets it apart from basic single-frequency transducers? CHIRP's continuous frequency sweep creates longer, more detailed echoes—think high-definition sonar versus old-school Polaroids. Over time, this means fewer missed bites and more time with rods bent.

Seamless Installation and Longevity

Getting it mounted is straightforward for DIYers or pros. Drill through the hull, bed it with marine sealant, and connect the 33-foot cable ending in a CP450C plug. No special tools required beyond standard thru-hull fittings. Bronze construction shrugs off corrosion, and with proper fairing, it thrives at displacement and planing speeds alike.

For peak performance, align it dead ahead and parallel to the waterline. Pro tip: In high-deadrise hulls, a fairing block minimizes cavitation, ensuring clean pings boat-wide.

Enhance Your Marine Electronics Setup

This transducer shines brightest when integrated into modern multifunction displays. Its broadband CHIRP output feeds detailed imagery to screens, overlaying fishfinding with charts and radar for a 360-degree awareness picture. Whether chasing billfish or navigating inlets, it elevates your vessel's electronics from good to elite.

Everyday Maintenance for Peak Performance

Keep it humming by wiping the face after every trip to remove growth. Inspect the cable for chafe annually, and avoid antifouling paints that could dull the ceramics. Simple care ensures years of reliable service, turning one-time investments into decade-long assets.