Garmin 0100259401 Chart Plotter

Imagine gliding across your favorite lake or coastal waterway, with crystal-clear images of the underwater world revealing every hidden structure, school of fish, and contour below. The Garmin ECHOMAP UHD2 7-inch chartplotter transforms how you navigate and fish, blending cutting-edge sonar imaging with intuitive mapping to give you an edge on the water. Whether you're a weekend angler chasing bass in shallow coves or a serious boater plotting offshore routes, this device delivers reliable performance in a compact, sunlight-readable package.

At its core, high-contrast vivid color palettes on the scanning sonar make separating fish from weeds or rocks effortless, even in murky conditions. Paired with the included GT20-TM transducer, it supports dual sonar types—traditional CHIRP for wide-area coverage and ClearVü for photo-like side and down views—ensuring no target slips away. Anglers report spotting fish arches sharper than ever, thanks to the enhanced resolution that cuts through clutter like a knife.

Unlock Crystal-Clear Sonar Views

Dive deeper into the water column with Garmin's proven CHIRP traditional sonar operating across 70/83/200 kHz frequencies. This delivers exceptional target separation, letting you distinguish individual fish in a boil from bottom-hugging structure. Complementing it is ClearVü scanning sonar at 260/455/800/1000/1200 kHz, which paints nearly photographic images of what's directly beneath and to the sides of your boat.

Real-world users love how the vivid palettes pop on the 7-inch WVGA display (800 x 480 pixels), optimized for inboard or outboard mounting. No more squinting at faded screens—the TN panel shines under direct sun, with adjustable backlight for dawn patrols or dusk bites. Pro tip: Fine-tune sensitivity mid-session to adapt to water depth or temperature shifts, maximizing detail on everything from suspended walleye to reef edges.

Navigate with Confidence Using Preloaded Maps

Preloaded with U.S. LakeVü g3 inland maps, this chartplotter covers thousands of lakes with 1-foot contours, underwater features, and shoreline details sharper than many competitors. Switch seamlessly to BlueChart g3 coastal charts for bays, inlets, and harbors, or tap into the worldwide basemap for global adventures. What sets it apart? Compatibility with premium Garmin Navionics+ and Navionics Vision+ cartography, including high-res bathymetry and daily updates via the app.

Custom mapping shines with Quickdraw Contours, where you log your own sonar data to build personalized HD maps on the fly. Share them wirelessly with the Garmin community, so next trip, you're fishing proven spots others overlook. For tournament pros, waypoint management is a breeze—mark hot bites, group them by species, and route around no-wake zones effortlessly.

Stay Connected On and Off the Water

Built-in Wi-Fi opens a world of convenience, pairing with the free Garmin Connect mobile app. Download software updates, access OneChart for map purchases, and pull in Quickdraw Community data from fellow users who've mapped your waters. It's like having a network of local experts at your fingertips.

Network multiple units via Wi-Fi to share sonar screenshots, waypoints, and routes in real-time—perfect for multi-boat fishing parties. For advanced setups, NMEA 2000 compatibility integrates with engine data, autopilots, and radar, creating a unified helm display without cables everywhere.

Rugged Build for Real-World Demands

Measuring just 9.1 x 5.6 x 2.6 inches, this keyed interface unit fits tight consoles yet feels premium. The IPX7 waterproof rating shrugs off splashes, rain, or the occasional rogue wave. Simple keypad controls keep gloves-on operation intuitive—no touchscreen smudges or freezes in wet hands.

Durability meets everyday ease: Quick-release bracket for theft-proof storage, plus flush or surface mounting options. Saltwater anglers appreciate the corrosion-resistant materials, while freshwater folks value the vibration-proof design for rough trails to remote lakes.

Streamlined Setup and Everyday Tips

Getting started is straightforward—transom-mount the GT20-TM transducer parallel to the hull bottom for optimal readings, route cables cleanly through existing gimbal holes, and power up via 12V DC. Calibrate sonar in open water, then sync maps over Wi-Fi before launch.

For peak performance, clean the transducer face regularly to avoid signal loss from algae buildup. Update firmware seasonally to unlock new features like improved noise rejection. Troubleshoot faint sonar? Check keel clearance and adjust gain—common fixes that keep you fishing longer.

Why Anglers and Boaters Swear By It

This chartplotter isn't just gear; it's a game-changer for dialing in patterns. Bass fishermen track staging fish on ClearVü edges, walleye hunters grid-search with CHIRP spreads, and offshore captains plot safe passages with layered charts. Its blend of affordability, sonar punch, and expandability outshines bulkier systems, earning top marks for value in user reviews.

Backed by Garmin's marine expertise, it evolves with you—from casual outings to competitive pursuits—delivering returns on every outing through bigger catches and safer navigation.