Outfitting a boat for marine electronics sonar navigation often means choosing between two very different tools: one that tells you where the boat is going, and one that tells you what is under the water. The Boat GPS Navigator with AIS and the Garmin Fishfinder 160C take different paths. The GPS unit leans on chart display and positioning, while the Garmin focuses on sonar for locating fish. Your decision comes down to how you spend your time on the water.
Quick Verdict
If you are mainly an angler who wants a dedicated sonar unit, the Garmin Fishfinder 160C is the lower-priced pick. If you need a marine GPS navigator with AIS and dual chart support, the Boat GPS Navigator is worth the higher price.
At a Glance
| Product | Listed Price | Price Bar | Best For |
|---|---|---|---|
| Boat GPS Navigator 5in Marine GPS Navigator AIS TFT LCD Screen LED Backlight | USD 336.52 | Navigation, AIS, dual chart systems | |
| Garmin Fishfinder 160C Marine Boat Echo Sounder Sonar Fish Finder | USD 175.00 | Sonar and fish finding |
Where Each Product Wins
The Boat GPS Navigator wins for boaters who want a wide 12-36V input range and universal fitment alongside their navigation display. The Garmin Fishfinder 160C wins for anglers who want a dedicated sonar tool with the Garmin name and a specific part number at a lower listed price.
Product Notes
Boat GPS Navigator 5in

Choose this marine GPS navigator when your priority is route planning and situational awareness. The TFT LCD screen packs a 480 x 272 resolution with LED backlight and a wide viewing angle, and the dual chart system supports both C-MAP and XINUO MAP. It also includes a high-accuracy compass and GPS dual-mode positioning to give position, speed, and heading. The listed universal fitment helps if you are wiring it into a boat with a 12V to 36V system. The trade-off is the price: at USD 336.52, this is the more expensive option in this pairing. That higher cost is easier to justify if you spend more time navigating than looking for fish.
Garmin Fishfinder 160C

The Garmin Fishfinder 160C is the sonar-focused choice. It is listed at USD 175.00, which is below the GPS unit, and the Garmin part number FISHFINDER 160C makes it easy to identify. This unit is built around echo sounder performance for a successful fishing experience, so it suits anglers focused on bottom structure and fish location. The limitation is the condition: it is listed as 'New other (see details)', meaning it is not described as a standard factory-sealed unit. If that is acceptable, the lower price and dedicated sonar make it a straightforward pick for anglers.
Final Choice by Use Case
Choose the Boat GPS Navigator if you need a chartplotting screen, AIS, and a more comprehensive navigation feature set. Choose the Garmin Fishfinder 160C if you want a dedicated sonar finder, a lower listed price, and you are comfortable with a 'New other' unit. For navigation-heavy days, the GPS navigator is the better fit. For fishing trips where sonar matters most, the Garmin Fishfinder 160C gets the job done.