Like the 8416xsv, it combines a full-HD touchscreen chartplotter with built-in sonar support (CHIRP traditional plus CHIRP ClearVu/SideVu scanning sonar), giving it complete standalone fishfinder-plus-navigation capability without needing a separate sonar module. The 8600 series' faster internal processing improves chart redraw speed and responsiveness when panning/zooming large chart datasets or running multiple sonar/radar overlays at once compared to the base 8400 series. As with every unit in the 8000-series lineup, it networks over NMEA 2000 and the Garmin Marine Network to share data with other chartplotters, radar, and sonar sources on the same boat, and can be flat-mounted edge-to-edge with other units to build a genuine glass-helm array. Buyers upgrading from an older 8400-series display typically choose the 8600 tier specifically for this processing and networking headroom, particularly on boats already running several networked displays, radar, and sonar sources where the older generation's slower internal processing can become a genuine bottleneck.