Overview

The Garmin 010-00957-00 is a digital black box network sounder that adds traditional sonar to a compatible Garmin chartplotter over the Garmin Marine Network. It supports 50/200 kHz operation with sounder output up to 2,000 W RMS depending on the transducer, and it runs on 10 to 35 V DC for typical 12 V or 24 V systems.

This module is built for installations where you want the sounder hardware out of the helm display and in a protected location, then share sonar views across the network. Maximum depth is up to 5,000 ft (1,512 m) with the right transducer and conditions.

The housing is IPX7 water resistant, and the unit measures 204 x 283 x 81 mm (8.0 x 11.2 x 3.2 in). Plan the mounting location so it stays out of standing water and has airflow for heat management.

Key features

• 50/200 kHz sonar support with sounder output up to 2,000 W RMS (transducer dependent)
• Selectable transmit power levels of 600 W, 1 kW, or 2 kW when paired with an appropriately rated transducer
• Sonar data output over the Garmin Marine Network to compatible networked chartplotters
• 10 to 35 V DC input with 40 W maximum power usage and a 7.5 A fuse requirement
• Fully gasketed aluminum and steel housing with IPX7 water resistance
• Compass safe distance of 40 cm for planning placement around magnetic compasses

What's included

• GSD 24 sounder module
• Power cable
• Marine network cable (6 ft)
• Mounting hardware
• 8-pin female to wire block adapter
• Software update SD card
• Documentation

Installation and setup

Mount the module where it cannot be submerged and where there is adequate ventilation. Leave enough clearance to see the status LEDs and to connect the power, network, and transducer cables without sharp bends, then secure the wiring along its run so it does not chafe in vibration.

After physical installation, connect it to the networked chartplotter system and apply power. Software updates are handled through the chartplotter using a memory card when needed.

Compatibility and fit

This sounder is intended for boats using the Garmin Marine Network. It connects to a compatible chartplotter either directly or through a network port expander, and sonar information can be viewed on networked displays once it is online.

A transducer is required for operation and is not included. The transducer selection and installation have a direct impact on performance, including the usable power level and achievable depth.

Electrical and system integration

Power input is 10 to 35 V DC, which covers common 12 V and 24 V house systems. Use the specified 7.5 A fuse and route the supply wiring as a protected circuit from your distribution panel or breaker system.

Maximum power usage is 40 W. For clean sonar performance, keep power runs tidy, avoid sharing the feed with noisy loads when possible, and maintain solid battery and ground connections.

Use on board

On fishing boats and cruisers that already rely on a networked Garmin helm, this module is a practical way to add a dedicated sounder for bottom tracking and target separation without taking space at the display. It is also a good fit when you want sonar available on more than one screen through the onboard network.

Maintenance and care

Periodically inspect cable connections for corrosion and make sure locking rings are snug. If the unit is installed in a damp locker, keep the area ventilated and check that the module remains above any bilge water line.