When you're comparing marine electronics sonar navigation gear, the first question is how much multifunction display you actually need at the helm. Two used units show that trade-off clearly: the Garmin GPSMAP 440S is a straightforward GPS chartplotter with a suncover, mount, and power cord included, while the Simrad NSS12 is a larger multifunction display with a 12-inch touchscreen, radar, Active Imaging sonar, and enhanced inland and coastal charts.
Quick Verdict
If you want a lower-priced chartplotter with the mount and suncover included, the Garmin GPSMAP 440S makes sense. If you want a larger command center that pairs navigation with radar and Active Imaging sonar, the Simrad NSS12 is the one to buy.
Comparison at a Glance
| Product | Listed Price | Price Bar |
|---|---|---|
| Garmin GPSMAP 440S | $279.99 | |
| Simrad NSS12 | $1,199.95 |
Both units are in used condition.
Where the Garmin GPSMAP 440S Wins
The Garmin is the lower-cost way into marine sonar navigation. Its bundle includes a suncover, mount, and power cord, so you can set it up at the helm without tracking down extra hardware. The chartplotter focus is straightforward: this is a dedicated GPS navigation display, not a multifunction radar/fishfinder. For many boaters, that separation keeps the purchase price manageable.
Where the Simrad NSS12 Wins
The Simrad is the full-featured option. The 12-inch touchscreen gives you a large canvas for charts, and the unit is built for powerboats and sportfishing center consoles. It includes radar and Active Imaging sonar along with enhanced inland and coastal charts. The simple menus and one-touch keypad buttons are designed for quick access to key functions, which helps when you're navigating at speed or working a fishing spot.
Product Notes
Garmin GPSMAP 440S
This used Garmin chartplotter is a focused navigation display at a friendly price point. The included suncover, mount, and power cord reduce setup friction, so you can place it at the helm and go. Country of origin is the United States, and the GPSmap 440S part number gives you a clear reference when you need to look up compatible accessories. If your boat needs simple GPS chartplotting rather than a full fishfinder/radar MFD, this unit covers the core need without pushing your budget. The limitation is scope: it's a chartplotter first, not a radar/fishfinder multifunction display. You won't get the 12-inch touchscreen or Active Imaging sonar that the Simrad NSS12 offers, so those tools require the pricier unit.
Simrad NSS12
The Simrad NSS12 is the unit to consider when you want navigation and sonar in one large display. The 12-inch touchscreen is paired with radar, Active Imaging sonar, enhanced inland and coastal charts, and a keypad with one-touch buttons for quick function access. Its design fits powerboats and sportfishing center consoles, and the simple menus make the touchscreen easy to work with while the boat is moving. That capability comes at the upper end of the price range for this head-to-head comparison. If your boat already has a proven chartplotter or you only need waypoint navigation, this level of integrated gear may be more than you'll want to spend.
Final Choice by Use Case
Choose the Garmin GPSMAP 440S when you want a direct, lower-priced path to GPS chartplotting and value the included suncover, mount, and power cord. Choose the Simrad NSS12 when you want a 12-inch touchscreen that combines radar, fishfinding sonar, and enhanced coastal and inland charts in one marine electronics command center.
