Garmin GSD 24 Advanced Sonar Module, 10-35V, IPX7, 50/200 kHz, 25-2,000W RMS

Overview

The Garmin 010-N0957-00 is a GSD 24 advanced sonar module for adding black-box 50/200 kHz fishfinder capability to compatible Garmin Marine Network chartplotters. It supports 25 to 2,000 W RMS sounder power depending on the connected transducer, with selectable transmit power levels and depth capability up to 5,000 ft in suitable conditions.

This module is made for boats that need stronger sonar performance than a basic built-in sounder can deliver, especially for fishing, bottom tracking, and reading structure below the hull. It connects to the Garmin Marine Network so sonar data can be shown on compatible networked Garmin displays instead of being limited to one screen.

The housing is fully gasketed aluminum and steel with an IPX7 water rating, and the unit accepts 10-35 V DC power for use on common 12 V and 24 V boat electrical systems. Its size is 8 in. x 11.2 in. x 3.2 in., so it is best planned as a fixed installation in a protected, ventilated electronics space.

Key features

• Garmin GSD 24 sonar module for compatible Garmin Marine Network chartplotters.
• Dual-frequency 50/200 kHz sonar support for traditional fishfinding and bottom detail.
• 25 to 2,000 W RMS transmit power range, with output dependent on transducer rating and depth.
• Maximum depth capability up to 5,000 ft, depending on transducer, water salinity, bottom type, and conditions.
• 10-35 V DC power input works with typical 12 V and 24 V marine electrical systems.
• IPX7-rated housing with fully gasketed aluminum and steel construction for protected marine installations.
• Single Garmin Marine Network port shares sonar information with compatible Garmin displays on the network.
• 7.5 A fuse rating and 40 W maximum power usage help with electrical planning during installation.

Installation and setup

The GSD 24 should be mounted where it cannot be submerged, where air can circulate around the housing, and where the status LEDs remain visible for troubleshooting. Leave enough access for the power, network, and transducer cables so the locking rings can be fitted without strain on the connectors.

Power connection is made to DC positive and ground using the supplied power cable and the required in-line fuse. The network cable connects the module to a compatible Garmin chartplotter or to a Garmin Marine Network port expander, while the transducer connects to the sounder through the transducer port.

Compatibility and fit

This sounder module is for Garmin Marine Network systems and requires a compatible transducer for operation. Transducer choice matters because transmit power, frequency behavior, mounting style, and final depth performance depend on the transducer and the installation location on the hull.

The unit has a compass-safe distance of 15.75 in., which should be considered when placing it near a steering compass or sensitive electronics. For fiberglass mounting surfaces, pilot-hole preparation and careful screw tightening help avoid gelcoat damage.

Use on board

This module is a good match for anglers and cruising boats that already use compatible Garmin displays and need a dedicated sonar source for deeper water, structure, reef edges, drop-offs, or general bottom awareness. It is especially useful when sonar needs to be shared across more than one helm or display location through the Garmin Marine Network.

What’s included

• GSD 24 sonar module
• Power cable
• Marine network cable, 6 ft
• Mounting hardware
• 8-pin female to wire block adapter
• Documentation

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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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