Garmin GT51M-THP Stainless Steel Thru-Hull Transducer Pair, CHIRP ClearVü/SideVü, 600W 80-160 kHz, 500W 260/455 kHz, 12-Pin, Depth/Temp, Up to 25 Degree Deadrise

Overview

The Garmin 010-01966-11 is a GT51M-THP stainless steel thru-hull transducer pair for traditional CHIRP plus CHIRP ClearVü and SideVü scanning sonar using a 12-pin connection. Traditional sonar runs mid-band CHIRP 80 to 160 kHz at 600 W, and the ClearVü and SideVü elements run 260 and 455 kHz at 500 W per element.

This is a port and starboard set that installs on both sides of the keel so the side-looking beams stay clear. It also includes a fast-response temperature sensor, and it is intended for hull deadrises under 25 degrees at the mounting location.

Key features

• Thru-hull port and starboard transducer pair for ClearVü and SideVü scanning plus traditional CHIRP sonar
• Traditional CHIRP: 600 W, mid-band 80 to 160 kHz
• ClearVü and SideVü elements: 500 W per element, 260 and 455 kHz
• 12-pin connection through an included Y-cable to combine the pair at the display or sonar module
• Built-in fast-response temperature sensor for real-time surface readings
• Stainless steel stems and thru-hull mounting hardware for secure installation below the waterline
• Specified for hull deadrises less than 25 degrees at the install point

Installation and setup

Plan the install as a true pair: one transducer on the port side and one on the starboard side, positioned so the keel does not block SideVü coverage. Fairing blocks are used to match the transducer to the hull angle; when the deadrise at the mounting location exceeds 5 degrees, a fairing block is required, and the cutting angle is limited to 25 degrees.

Because this is a thru-hull installation, take the same care you would with any below-waterline fitting: confirm internal clearance before drilling, seal any exposed core, and bed the hardware properly so it stays watertight through temperature swings and vibration.

Compatibility and fit

This transducer set is meant for Garmin sonar systems that support traditional CHIRP plus ClearVü and SideVü scanning and accept a 12-pin transducer connection. Match the supported sonar types and frequency ranges to your display or black box before ordering, especially if you are moving from an 8-pin or older transducer style.

Use cases on board

On coastal runs, reef fishing, and deeper structure work, this setup gives you a traditional CHIRP view for arches and bottom separation alongside scanning views that help you read edges, bait, and bottom changes to both sides of the boat. It is a good match for boats where a single side-looking transducer would have its view shaded by the keel.

Maintenance and care

Rinse the exterior after saltwater use and keep the faces clear of paint buildup and marine growth so the sonar stays consistent. During routine haul-out or diver checks, inspect the stems, bedding, and cable routing for signs of movement, abrasion, or seepage.

What’s included

• Two thru-hull transducers (port and starboard) with stainless steel stems
• Fairing blocks
• Y-cable
• Bushings
• Mounting hardware
• Installation instructions

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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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