Unlock Crystal-Clear Underwater Insights with the PM265LH

Imagine gliding through open waters, your fish finder painting a vivid picture of the seafloor and schools of fish darting below. The Furuno PM265LH Bronze Pocket Mount CHIRP Transducer delivers that precision, blending rugged bronze construction with advanced CHIRP sonar technology. Designed for pocket or keel mounts, its flat face hugs the hull seamlessly, ensuring reliable performance even in rough seas. With an integrated temperature sensor, you'll get surface water temps alongside stunning sonar returns—perfect for targeting species that chase thermal shifts.

This isn't just another sonar probe; it's a game-changer for serious anglers and navigators who demand separation between baitfish and bigger game, or clear bottom structure in depths up to thousands of feet. The bronze housing stands up to corrosive saltwater environments, making it a staple for offshore adventures.

Why CHIRP Technology Sets the PM265LH Apart

Conventional sonar hits you with fixed frequencies and quick pulses, often missing faint echoes or blending targets together. CHIRP flips the script by sweeping a wide band of frequencies in a single, powerful pulse. The result? Echoes that return sharper and stronger, revealing fish arches with incredible detail and bottom contours that traditional units blur over.

For the PM265LH, this means dual-band prowess:

• Low-frequency sweep (42-65 kHz): Penetrates deep water effortlessly, ideal for probing wrecks, drop-offs, and pelagic species in 3,000+ feet.
• High-frequency sweep (130-210 kHz): Sharpens shallow-water views, spotting structure and game fish right off the bottom with pinpoint accuracy.

Pair it with Furuno's broadband sounders, and digital signal processing amplifies weak signals, cutting through thermoclines and noise for fish-holding spots you might otherwise miss.

Seamless Pocket Mount Installation for Optimal Performance

Pocket mounting positions the transducer flush in a custom hull pocket, minimizing drag and air bubbles that plague thru-hulls. The PM265LH's bronze body and 12-pin connector make it straightforward for installers familiar with marine electronics.

1. Prep the pocket: Ensure it's faired smooth and aligned fore-aft for dead-ahead tracking.
2. Secure with high-strength epoxy: Bronze bonds well, but fairing compound prevents leaks.
3. Route the cable carefully: Avoid sharp bends near the connector to protect internals.
4. Test at speed: Verify no aeration up to hull speed—adjust deadrise angle if needed (typically 12-20 degrees).

Pro tip: In high-speed applications, add a high-flow scoop for fairing to keep water flowing laminar over the face.

Real-World Performance Across Conditions

Offshore tuna hunters rave about the low-freq band's ability to cut through downriggers and heavy plankton layers, marking meter-plus marks at 1,000 feet. Coastal wreck divers appreciate the high-freq detail on crab pots and ledges in 100 feet or less. Even in murky estuaries, the broad sweeps pull targets from clutter better than narrowband rivals.

The temp sensor shines for live-lining—track bait balls hugging 68°F water while game fish prowl 62°F upwellings. It's battle-tested on sportfishers, charters, and workboats where downtime isn't an option.

Caring for Your Investment: Longevity Tips

Bronze laughs off barnacles and electrolysis, but antifouling paint on the face keeps it slime-free. After hauls, freshwater rinse removes salt crystals. Inspect the 12-pin connector seasonally—corrosion here kills signals fast. With proper care, expect years of rock-solid readings.