Choosing between a brand-new marine GPS navigator and a Garmin chartplotter can feel like comparing two different boating strategies. In the marine electronics sonar navigation category, you're really deciding whether to spend more for a new unit with modern features or spend less on a Garmin that may need work. Both have a place on a boat, but they fit very different owners.
Quick Verdict
The Boat GPS Navigator 5in is the stronger pick if you want a modern, feature-rich navigation display. The Garmin GPSMAP 740s is the stronger pick if you want a Garmin chartplotter and are comfortable with a project.
Comparison Table
| Feature | Boat GPS Navigator 5in | Garmin GPSMAP 740s |
|---|---|---|
| Listed price | USD 336.52 | USD 150.00 |
| Condition | New | For parts or not working |
| Screen | 5in TFT LCD with LED backlight | Chartplotter with sun-damaged screen |
| Navigation | AIS, GPS dual-mode positioning, dual chart system | Garmin chartplotter |
Where Each Product Wins
The Boat GPS Navigator 5in is the better fit if you care more about a modern feature set. The Garmin GPSMAP 740s is the better fit if you care more about the Garmin chartplotter model.
Product Notes
Boat GPS Navigator 5in Marine GPS Navigator AIS TFT LCD Screen LED Backlight
The Boat GPS Navigator 5in is built around AIS capability, which can be a differentiator for boaters who want to see AIS targets on a dedicated display. It also runs a dual chart system with C-MAP and XINUO, giving you two ways to view marine charts without needing to switch devices. The unit is new, with universal fitment noted as a feature. On the hardware side, it supports a wide voltage range of DC12-36V, which can be helpful on boats with variable electrical systems. It also offers multiple language options and six screen modes, so you can customize how chart data appears. The high-accuracy compass and GPS dual-mode positioning add another layer of positioning data. On the downside, the $336.52 price is the higher of the two, so you are paying more for a new unit with current features. If you want a new navigator with AIS and chart flexibility, this is the more complete option.
Garmin GPSMAP 740s Chartplotter Marine GPS TESTED W/ Sun Cover Power Cable Cut
The Garmin GPSMAP 740s is a Garmin chartplotter offered in for-parts or not-working condition. It comes with a sun cover and a cut power cable, so you have some physical pieces to work with. The screen has sun damage, which is the main visual problem. The $150.00 price is the lower of the two, so you can get a Garmin chartplotter without spending as much. Because the unit is sold for parts, you should expect to source a new screen or other components before relying on it. The cut power cable is another thing you will need to address. For someone who enjoys troubleshooting marine electronics, the Garmin GPSMAP 740s could be a worthwhile project. For someone who wants a working unit immediately, the condition is a clear limitation.
Final Choice by Use Case
Choose the Boat GPS Navigator 5in if you want a feature-rich navigator. Choose the Garmin GPSMAP 740s if you want a Garmin chartplotter.
