Garmin Echomap PLUS 42 CV Fish Finder and Chartplotter
Garmin Echomap PLUS 42 CV is a compact fish finder and chartplotter combination that stands out with its 4.3" WQVGA display, CHIRP and CHIRP ClearVü sonar support, IPX7 waterproof rating, and advanced mapping features.
Key Features
- Bright, sunlight-readable 4.3" combo display
- Built-in support for Garmin CHIRP traditional sonar and CHIRP ClearVü™ sonar (transom mount sold separately)
- Preloaded worldwide basemap compatibility information and support for BlueChart® g2 HD and BlueChart® g2 Vision® HD¹
- Create personalized fishing maps on-screen with 1’ contours using Quickdraw Contours mapping software
- Ability to share waypoints and routes with other ECHOMAP™ or STRIKER™ units
- IPX7 waterproof rating
- Easily remove the device from the power and mount with the quick-disconnect cradle
Advanced Sonar and Mapping Experience
This compact combo stands out with its easy installation and bright 4.3" display that remains readable even on sunny days. Garmin CHIRP traditional sonar improves target separation, while CHIRP ClearVü sonar helps scan structures beneath the boat with near-photographic imagery. Compatibility with BlueChart g2 HD and BlueChart g2 Vision HD expands your charting options. With Quickdraw Contours software, you can quickly create personalized fishing maps on-screen with 1’ contours while fishing. If you wish, you can share these maps with the Quickdraw Community via Garmin Connect™. It also allows you to share waypoints and routes with other ECHOMAP or STRIKER units.

Garmin CHIRP and ClearVü Technology
The built-in sonar capabilities of the ECHOMAP Plus 42cv include CHIRP sonar technology. CHIRP traditional sonar transfers more energy to the target, helping improve target separation and identification. Garmin CHIRP ClearVü sonar allows you to view structures, wrecks, and fish passing beneath your boat with near-photographic clarity.
Customizable Maps with Quickdraw Contours
Quickdraw Contours mapping software allows you to create personalized fishing maps on-screen with 1’ contours according to your own needs while fishing. You can keep these maps private or share them with the Quickdraw Community via Garmin Connect.

Chart Options and Memory
Offers the option to upgrade to chart solutions such as LakeVü HD with Max Def Lakes, LakeVü HD Ultra, BlueChart g2 HD, or BlueChart g2 Vision HD. A single microSD™ card slot provides expandable memory support for accessory chart purchases.
Practical Mounting and Portability
To safely protect your ECHOMAP Plus device when you are off the water, the cables plug directly into the mount. This allows you to easily connect and disconnect the device from the power source and mounting bracket.

Technical Specifications
| Feature | Value |
|---|---|
| Dimensions | 4.0" x 8.0" x 3.1" (10.2 x 20.4 x 0.4 cm) |
| Weight | 1.6 lbs (0.7 kg) |
| Waterproof rating | IPX7 |
| Display type | WQVGA display |
| Display size | 2.1" x 3.7"; 4.3" diagonal (5.4 x 9.5 cm; 10.5 cm diagonal) |
| Display resolution | 480 x 272 pixels |
| Power consumption | 5W |
| Mounting options | Bail mount or flush mount |
| Transducer maximum depth | 2,300 ft @ 77 kHz, freshwater | 1,100 ft @ 77 kHz, saltwater (depth capability depends on bottom type and other water conditions) |
| Sensor | |
| Receiver | 5 Hz |
| NMEA 2000® compatible | |
| Outdoor Activities | |
| Preloaded maps | No |
| Tide tables | |
| Connections | |
| Antenna | Internal or external via NMEA_0183 |
| Garmin Marine Network™ ports | No |
| Transducer pin numbers | 4 |
| NMEA 0183 input ports | 1 |
| NMEA 0183 output ports | 1 |
| Video input ports | No |
| Video output ports | No |
| Wireless connectivity | No |
| Maps and Memory | |
| Supported data cards | 1 microSD™ card; 32 GB maximum card memory |
| Waypoints | 5000 |
| Routes | 100 |
| Track log | 50,000 points; 50 saved tracks |
| Sonar Features and Specifications | |
| Dual-frequency (50/200 kHz) transducer support | |
| Dual-beam (77/200 kHz) transducer support | |
| Supported frequencies | CHIRP (low, medium, high) | Traditional: 50/77/83/200 kHz | ClearVü: 260/455/800 kHz |
| Transmit power | 500 W (RMS) / 4,000 W (peak-to-peak) |
| CHIRP transducer technology | Yes (built-in) |
| ClearVü | Yes with CHIRP (built-in) |
| SideVü | No |
| Bottom lock (shows return from the bottom up) | |
| Water temperature log and graph | |
| Chartplotter Features | |
| AIS support (tracks target vessel positions) | |
| DSC support (displays position data from DSC-enabled VHF radio) | |