Raymarine M265LH D In Hull Low-High Transducer

Raymarine M265LH D In Hull Low-High Transducer

Raymarine M265LH D In Hull Low-High Transducer offers the perfect solution: a high-performance, 1kW CHIRP transducer designed for internal mounting. This "tank-style" in-hull transducer provides the exceptional deep-water reach and target separation usually reserved for external mounts, all while remaining protected inside your vessel.

By utilising CHIRP (Compressed High-Intensity Radiated Pulse) technology across both low and high frequency bands, the M265LH delivers a "best of both worlds" sonar experience. The low-frequency band (42–65 kHz) allows you to track the bottom in depths of up to 3,000ft, while the high-frequency band (130–210 kHz) provides the crisp, high-resolution detail needed to distinguish baitfish from game fish in shallower water.

The M265LH is specifically designed for solid fibreglass hulls, this transducer is installed within a liquid-filled tank that is bonded to the inside of the hull. This makes it an ideal choice for trailered boats, high-speed RIBs, or vessels where drag and marine growth on an external sensor are concerns.

Raymarine M265LH D In Hull Low-High Transducer Key Features

• kW High-Power Performance: Delivering superior bottom tracking and fish detection at significantly greater depths than standard 600W transducers.
• Dual-Band CHIRP:
  • Low Frequency (42–65 kHz): For excellent deep-water performance and wide-area coverage (25° to 16° beamwidth).
  • High Frequency (130–210 kHz): Provides pinpoint accuracy and incredible target separation in the upper water column (10° to 6° beamwidth).
• In-Hull Mounting: No holes required through the hull, meaning zero drag, no risk of impact damage, and no fouling from marine growth.
• Versatile Installation: Includes a mounting tank that can be cut to match hull deadrise angles from 0° to 30°.
• Optimised for Raymarine: Fitted with an 11-pin connector, it is ready for direct connection to Raymarine’s premium sonar modules and MFDs, including the CP470, CP570, Axiom Pro RVX, and Axiom 2 Pro RVM.
• Internal Temperature Sensor: Provides accurate water temperature readings through the hull (on supported systems).
• Durable Construction: Built with a high-quality plastic/urethane housing designed to withstand the marine environment.

Morgan Marine Pro Tip: This transducer is suitable for solid fibreglass hulls only. It will not function through cored hulls (e.g., foam or balsa sandwich) or metal/wood hulls. If you are unsure of your hull construction, please contact our team in Brightlingsea for expert advice.

Technical Specifications:

• • Frequency: 42-65 kHz (Low) / 130-210 kHz (High)
  • Power Rating: 1000W (1kW)
  • Maximum Depth: 3,000ft (Low) / 1,000ft (High)
  • Hull Material: Solid Fibreglass
  • Cable Length: 10m (33ft)
  • Connector: 11-Pin Raymarine CHIRP Connector

COPY TITLE HERE FAQs

What makes the M265LH different from other transducers?

The M265LH is a professional-grade, 1kW CHIRP transducer designed to be mounted inside your boat’s hull. Because it "shoots through" the fiberglass, there is no need to drill holes below the waterline, and there is zero drag. This makes it a firm favourite for high-performance hulls and trailered boats where a transom or thru-hull mount might be at risk of damage.

Will it work with my boat's hull material?

This is a vital point: the M265LH is designed only for solid fiberglass hulls. The sonar signal cannot travel through "cored" hulls (those with foam or balsa wood sandwiches), nor will it work with metal or wooden boats. If you aren't sure about your hull's construction, give our workshop team a call and we can advise.

What do "Low" and "High" frequencies actually do?

This transducer covers two distinct frequency bands to give you the best of both worlds:

• • Low Frequency (42–65 kHz): Designed for deep-water performance, tracking the bottom down to roughly 914m (3,000ft). It uses a wider beam to find fish in the deep.
  • High Frequency (130–210 kHz): Perfect for shallow to mid-depths (up to 304m / 1,000ft). It has a narrow beam that provides incredible target separation—ideal for picking out fish hiding near structures or shipwrecks.

Is there a loss of performance because it’s mounted inside the hull?

This is  a common concern and while "shooting through" the hull traditionally meant a loss of signal, Airmar has engineered the M265LH specifically for this purpose. When installed correctly using the included yellow mounting tank (filled with propylene glycol), the performance is remarkably close to a thru-hull equivalent, with the added benefit of clean water flow at high speeds.

Does it provide water temperature readings?

Because the M265LH is mounted inside the hull and not in direct contact with the water, it does not provide an accurate sea temperature reading. If temperature is critical for your fishing, we recommend adding a small, dedicated Raymarine temperature sensor to your network.

How do I install the mounting tank on a curved hull?

The M265LH comes with a plastic tank that you cut to match your boat’s "deadrise" (the angle of your hull). It can accommodate angles up to 30°. Once the tank is cut and bonded to the hull, the transducer sits inside it, ensuring the beam is pointed vertically down for the most accurate readings.

Which Raymarine displays are compatible?

The M265LH is a "CHIRP-ready" transducer. It typically features the Raymarine 11-pin connector, making it a direct plug-and-play match for:

• • Axiom Pro RVX / Axiom 2 Pro RVM
  • CP470 / CP570 Sonar Modules
  • RVX-1000 / RVM-1600 High-Performance Sonar Modules (If you are using an older system or a different brand, contact our parts department to discuss the necessary adapter cables.)

Can I install this myself?

While many of our customers are handy with a saw and epoxy, precision is key. The hull must be smooth and free of air bubbles at the mounting site. If you’d prefer peace of mind, our Morgan Marine engineering team can handle the installation for you at our Brightlingsea boatyard, ensuring the tank is perfectly aligned and the signal is crystal clear.

Still have questions?

Whether you’re fishing the North Sea or cruising further afield, our team is here to help. Contact  the team at Morgan Marine: 📞 01206 302003 📧 enquiries@morganmarine.com 📍 The Boatyard, Brightlingsea, Essex.