Garmin B265LM Bronze Thru-Hull CHIRP Transducer, For GSD 26 CHIRP Sonar Module, 1 kW, Depth/Temperature, 42-65 and 85-135 kHz, 3,000 ft Max Depth, 39 ft Cable, 0-20 Degree Deadrise, Bare Wire

Overview

The Garmin 010-11647-20 is a bronze thru-hull mount transducer that supplies depth and temperature data for a compatible sonar setup. It is rated at 1 kW and is specified for depths up to 3,000 ft, making it a good fit when you need bottom tracking that holds up in deeper water.

This model covers two frequency ranges, 42 to 65 kHz and 85 to 135 kHz, so you can work with different bottom conditions and target depths. Beamwidth is specified at 16 to 25 degrees and 11 to 16 degrees, and the housing is intended to match hull deadrise from 0 to 20 degrees.

Key features

• Bronze thru-hull transducer for below-waterline mounting with depth and temperature sensing
• 1 kW power rating with specified depth capability up to 3,000 ft
• Operating frequency ranges: 42 to 65 kHz and 85 to 135 kHz
• Specified beamwidth ranges of 16 to 25 degrees and 11 to 16 degrees
• Designed to suit hull deadrise angles from 0 to 20 degrees
• Listed compatibility with the Garmin GSD 26 CHIRP Professional Sonar Module

Compatibility and fit

This transducer is intended to be paired with a compatible sonar module and display setup, and it is specifically listed for use with the Garmin GSD 26 CHIRP Professional Sonar Module. Before ordering, confirm your sonar hardware supports the operating frequency ranges shown for this model and that your hull deadrise falls within the 0 to 20 degree specification.

Because it is a thru-hull style, plan for access to both sides of the mounting location for installation and service. Make sure the chosen spot stays in clean water flow underway, away from steps, strakes, intakes, and turbulence that can affect sounder performance.

Installation and setup

Thru-hull mounting requires drilling the correct hull opening, bedding the housing properly, and tightening to the recommended torque so the seal remains stable through vibration and temperature swings. Take time to dry-fit the location, check clearance for tools and cable routing, and keep the cable run protected from chafe in bilges and rigging spaces.

After installation, use your electronics setup steps to confirm the transducer selection, temperature reading, and depth performance at idle and on plane. A quick check at the dock and again after the first run helps catch any seepage or cable strain early.

Use on board

This transducer suits boats that spend time offshore or in areas where deeper soundings matter, and it is also a practical choice for anglers who want bottom information that remains readable when conditions change. It works well on cruising powerboats and larger sailboats where a thru-hull install is preferred for consistent readings at speed.

Maintenance and care

Inspect the thru-hull area regularly for signs of loosening, seepage, or impact damage, especially after trailering, haul-outs, or grounding events. Keep the exterior face clean of heavy growth and paint buildup so the sonar signal is not muted, and recheck the sealing surfaces during routine bottom service.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

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Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

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Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

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