The Garmin GSD™ 25 (Part Number: 010-01159-00) is a premium remote sonar module engineered to provide advanced CHIRP sonar, CHIRP ClearVü, and CHIRP SideVü scanning capabilities to compatible Garmin chartplotters and multifunction displays. Featuring true dual-channel 1 kW CHIRP technology alongside dual-transducer support, this high-performance black-box processor transmits swept frequencies to deliver exceptional target separation, crisp bottom contours, and high-definition underwater imaging at depths down to 5,000 feet (1,500 meters). Built with waterproof IPX7-rated housing for demanding offshore environments, the GSD 25 seamlessly integrates into the Garmin Marine Network via high-speed Ethernet for effortless plug-and-play operation and high-resolution imaging across sportfishing and marine navigation setups.

In the Box

GSD 25
Right-angle power cable (6 feet)
Right-angle network cable (6 feet)
Mounting hardware
Documentation

Technical Specification

General
Case material	Polycarbonate
Dimension	9.9″×7.6″×2.6″ (251 mm × 192 mm × 66 mm)
Weight	1.7 lbs (0.77 kg)
Water rating	IPX7
Temperature range	From 5°F to 158°F (from -15°C to 70°C)

Electrical Features
Power input	10-35 V
Power usage	27 W maximum
Fuse	4.0 A
Compass-safe distance	30 cm (11.8 in.)

Sonar Features
Frequency	Traditional: 50/200, 77/200, 83/200 Single Channel CHIRP: 40-250 Dual Channel CHIRP: 40-250 SideVü/ClearVü: CHIRP 455/800 & CHIRP 260/455 (dependent on transducer)
Transmit power	1 kW
Maximum depth	5,000 ft. (1,524 m)