Choosing the right marine electronics sonar navigation setup often starts with a single question: do you want your chart on a large display that stays with the boat, or do you need it in your hand on the water? The two Garmin GPSMAP units here answer it differently. One is a 12-inch chartplotter meant to become the navigation center of a boat. The other is a rugged device that fits in a jacket pocket and goes where you go.
Quick verdict
If you want the boat-focused model, the Garmin GPSMAP 1222 is the clear choice. If you want a self-contained device that tracks waypoints and runs on internal battery, the Garmin GPSMAP 79s is the better fit. The difference in price matches the difference in display size and intended use: USD 1,300.00 versus USD 309.99.
Comparison table
| Product | Price | Display | Condition | Standout features |
|---|---|---|---|---|
| Garmin GPSMAP 1222 | USD 1,300.00 | 12-inch color, 1280 x 800 | Used | Chart plotting, internal GPS/GLONASS, network capable |
| Garmin GPSMAP 79s | USD 309.99 | High-resolution color, sunlight-readable | New | Floats, IPX7 water resistance, built-in compass/altimeter/barometer, 10,000 waypoints |
Where the GPSMAP 1222 wins
The GPSMAP 1222 is the better pick when you want a display that is part of the boat. Its screen makes charts easier to read, and it is fully tested and functional. If your trips are centered on fishing, cruising, or offshore navigation from the boat's console, the 1222 gives you the screen area that makes those tasks easier.
Where the GPSMAP 79s wins
The GPSMAP 79s wins for everything that happens away from the boat's main display. It is a handheld, which makes it easy to move around with you, and it comes new so you don't have to wonder about previous use. For a grab-and-go GPS that stays with you on deck or ashore, the 79s is the practical companion.
Garmin GPSMAP 1222
The GPSMAP 1222 is the one to choose if your priority is a large, readable chart display. Its 12-inch screen runs at 1280 x 800 resolution, which is the kind of detail you want when you're navigating offshore or looking for structure. It includes an internal GPS and GLONASS receiver and network capability for compatible Garmin gear, and the chart-plotting feature is central to the design. The limitation is that this is a used unit, so you can expect some cosmetic wear from previous use. A 12-inch chartplotter is also not something you would carry in a pocket. If that trade-off is acceptable, this display gives you the most screen area of the two.
Garmin GPSMAP 79s
Choose the GPSMAP 79s when portability and flotation matter more than a big screen. This unit is a floating handheld, so it is designed to stay on the surface if it goes overboard, and it is IPX7 water-resistant. It has a high-resolution color display that stays readable in sunlight, plus a scratch-resistant, fogproof lens. On the sensor side, it packs a built-in compass, altimeter, and barometer, and it remembers up to 10,000 waypoints. The main compromise is screen size: as a handheld, it does not give you the chart area of a larger chartplotter. For a day on the water with splashes and drops, it is the more forgiving companion.
Final choice by use case
If you need a navigation display that belongs to the boat, the Garmin GPSMAP 1222 is the one. If you want a rugged GPS that travels with you, the Garmin GPSMAP 79s is the better bet. The two units share Garmin's GPSMAP heritage and color displays, but they are built for different jobs. Match the device to the job and you'll get the most from your marine electronics.
