Garmin P79 Adjustable In-Hull Depth Transducer, 50/200 kHz, 600W, 6-Pin Connector, 0-22° Deadrise

Overview

The Garmin 010-10327-00 is a P79 adjustable in-hull transducer that delivers traditional sonar depth readings at 50 kHz or 200 kHz through a Garmin 6-pin connection. It runs a 600 W depth-only element and uses a 45° beamwidth at 50 kHz and a 12° beamwidth at 200 kHz, with depth performance to 305 m (1000 ft) and 183 m (600 ft) respectively.

This style of transducer mounts inside the hull and shoots through solid fiberglass, so there is no fitting sticking out below the boat. The base is bonded to the inside of the hull, then filled with propylene glycol or non-toxic antifreeze to create a consistent acoustic path between the transducer and the fiberglass.

It is a good match when you want dependable depth for cruising, fishing, or running offshore without drilling a hole for a thru-hull, especially on trailered boats or hulls that see lifts and beaching.

Key features

• Dual-frequency traditional sonar: 50 kHz (45° beamwidth) or 200 kHz (12° beamwidth).
• 600 W depth-only element for standard sounder depth tracking.
• Adjustable angle housing compensates for hull deadrise from 0° to 22° so the beam points straight down.
• In-hull install with no external protrusion, using a bonded base that is filled with propylene glycol or non-toxic antifreeze as the coupling medium.
• 6-pin connector for Garmin units that accept a 6-pin transducer plug.

Compatibility and fit

This transducer is meant to shoot through solid fiberglass. It will not perform correctly through cored fiberglass sections, wood, or metal hulls, and it can struggle in spots where the laminate has trapped air or voids.

Choose a mounting area that stays in clean water while underway and is away from strakes, steps, through-hulls, or anything else that introduces bubbles under the hull. A quiet, wet section of the bilge forward of the engine room is often where installations succeed.

Installation and setup

The base is aligned to the keel, sealed to the hull, and left to cure before it is filled with the coupling liquid and the transducer is locked into place. The locking ring has angle ribs that help you match the hull angle so the transducer sits level when installed.

Route the cable where it stays above bilge water, protect it with grommets at any pass-through, and keep it separated from high-current wiring where practical to reduce noise on the sounder.

On-board use

50 kHz is commonly used when you are trying to hold bottom in deeper water with a wider cone, while 200 kHz tightens the cone under the boat for more precise depth under the keel in shallower water.

This setup fits owners who want straightforward depth information for coastal cruising, offshore runs, and fishing, and who prefer an inside-the-hull installation that leaves the outside of the boat smooth.

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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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