Garmin B258 1kW Bronze Thru-Hull Depth/Temp w/FB - 8-Pin

Imagine cruising through choppy offshore waters, confidently tracking fish schools at extreme depths or mapping the seafloor with crystal-clear precision. This rugged bronze thru-hull transducer delivers exactly that, blending high-power sonar capabilities with reliable temperature readings to elevate your boating adventures. Engineered for serious mariners who demand performance without compromise, it cuts through the noise of generic sensors to provide actionable insights on the water.

Superior Deep-Water Detection for Serious Boaters

With its robust 1kW output, this transducer excels in challenging environments where lesser units falter. The dual-frequency setup—switching seamlessly between broader coverage for wide-area scanning and focused beams for pinpoint detail—means you spot structure, baitfish, and bottom contours up to impressive depths. Fishermen targeting trophy species in deep blue water appreciate how the narrow beam angle sharpens bottom definition, revealing subtle drop-offs and wrecks that could hold your next big catch.

Bronze construction stands up to constant saltwater exposure, resisting corrosion better than plastic alternatives. The included fairing block streamlines water flow over the face, minimizing air bubbles and turbulence for consistent readings even at speed or in rough conditions. Paired with integrated temperature sensing, you'll get a full picture of underwater conditions, helping you adjust trolling speeds or bait choices on the fly.

Seamless Integration with Your Marine Electronics

Designed as a drop-in upgrade for compatible chartplotters and sounders, the 8-pin connector ensures plug-and-play simplicity. Its extended cable reach gives installers flexibility, whether you're working on a sleek sportfisher or a sturdy cruiser. This unit thrives on hulls with deadrise angles in the common range, making it versatile for most planing and displacement vessels.

Pro Tips for Optimal Performance

• Position the thru-hull mount forward of the propeller and strakes to avoid interference, ensuring laminar flow for accurate data.
• Match the fairing block's angle precisely to your hull's deadrise during install—mismatches can lead to signal loss in turns.
• Combine with high-definition sonar settings on your display for enhanced target separation, turning raw pings into fishable intel.
• Regularly inspect the face for marine growth; a clean surface is key to maintaining sensitivity over long trips.

Built for Endurance on the Open Water

Boat owners rave about its longevity in harsh marine settings—from pounding through head seas to enduring tropical heat. Unlike budget transducers that ghost out in deep water or foam up at displacement speeds, this one maintains lock-on reliability. It's the choice for offshore tournaments, long-range cruising, or anyone serious about sonar as a tool for safer, more productive outings.

Enhance your setup by calibrating water temperature offsets for precise baitfish tracking, or layer depth data with GPS charts for custom contour maps. Mariners often pair it with forward-facing sonar for a 360-degree view, but it shines solo on vessels prioritizing depth over side-scan bells and whistles.