The Fishfinder 90 wraps simple operations and Garmin’s exclusive fishfinder technology into an entry-level sonar. It’s perfect for any vessel where space is at a premium. Dual-beam transducer operation gives you better shallow-water performance. The wide viewing angle (60°) lets you see fish even off the sides of the boat. With a basic black-on-white display, the Fishfinder 90 has one of the sharpest screens for the money.

The affordable Garmin Fishfinder 300C color sounder is just right for recreational anglers See Fish in Bright Color. The Garmin 300C has a super bright, high resolution 3.5-inch QVGA color display with improved user interface, plus UltraScroll for screen updates at live-action speeds. The Garmin 300C comes with a dual beam transducer, which provides excellent coverage in shallow waters.

For added flexibility, upgrade your Garmin plotter, to a full-fledged combination chartplotter/sounder at any time by adding a Garmin® GSD 21 "black box" sonar and transducer. The GSD 21 analog sounder adds detailed sonar data to your compatible Garmin chartplotter - See list of compatible units in 'more details'

The powerful GSD 22 digital sounder adds detailed sonar data to your compatible Garmin chartplotter over the Garmin Marine Network.This black-box sounder connects to your chartplotter over the Garmin Marine network to provide high-speed data returns and super-crisp detail. Once connected, any plotter on the network can view the 22's detailed sonar data and overlay it on the map page. You can also use the GSD 22 with Garmin's CANet™ to connect to non-network chartplotters. See list of compatible units in 'more details' 

The Fishfinder 400C combines high performance with a simple interface that makes it easy to locate fish in both freshwater and saltwater.  Adapts to freshwater and saltwater. The Fishfinder 400C is available with a choice of dual beam or dual frequency transducers — so it’s readily adaptable for both freshwater and saltwater fishing. The 400 watt (RMS) dual beam version offers a wide fish-finding cone and reaches depths of 900 feet. The 500 watt (RMS) dual frequency setup can run as deep as 1,500 feet. Connect with CANet™. Both versions feature a crisp, ultra-bright 4” QVGA color display — plus UltraScroll™ for screen updates at live-action speeds. Built-in CANet connectivity enables sonar data to be shared with compatible Garmin chartplotter displays as well.