Choosing a fish finder for a small boat can be difficult because most high-end marine electronics are designed around larger consoles with plenty of mounting space and electrical capacity.
That does not mean a jon boat, skiff, aluminum fishing boat, or other small boat needs basic electronics.
You can still get CHIRP sonar, Down Imaging, Side Imaging, GPS, and mapping without installing a giant screen on the console.
The important part is choosing something that gives you enough screen space to actually use those features without making the boat unnecessarily complicated.
I researched current fish finders that work especially well on smaller fishing boats and selected options across several price ranges.
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Quick Comparison
| Fish Finder | Best For | Screen | Main Sonar | GPS |
|---|---|---|---|---|
| Garmin STRIKER Vivid 7sv | Best Overall | 7" | CHIRP + ClearVü + SideVü | Yes |
| Humminbird HELIX 7 SI GPS G4 | Best Mapping + Side Imaging | 7" | CHIRP + DI + SI | Yes |
| Garmin ECHOMAP UHD2 53cv | Best Compact Chartplotter | 5" | CHIRP + ClearVü | Yes |
| Humminbird PiranhaMAX 4 DI | Best Compact Budget Pick | 4.3" | Dual Beam + Down Imaging | No |
| Lowrance Eagle 4x | Best Basic Fish Finder | 4" | Wide-Angle Sonar | No |
Best Fish Finders for Small Boats
Small boats actually give you quite a lot of flexibility when choosing electronics.
Unlike a kayak, you normally have more room for a battery and can permanently mount the transducer on the transom.
However, I still would not automatically buy a 9-inch or 12-inch display.
For many small boats, a 5-inch to 7-inch fish finder gives you a much better balance between visibility and available console space.
If your budget stops at $500, I have also covered the best fish finders under $500 separately.
1. Best Overall: Garmin STRIKER Vivid 7sv
The STRIKER Vivid 7sv gives small boat anglers a lot of sonar capability without moving into a massive marine electronics system.
You get a 7-inch display with traditional CHIRP, ClearVü, and SideVü.
SideVü is particularly useful from a small boat because instead of driving directly over every piece of structure, you can scan water on both sides of the boat.
That can help when searching shorelines, points, weed edges, submerged trees, or other areas where fish may be holding away from your exact path.
It also has GPS, waypoint marking, routes, and Quickdraw Contours.
Garmin continues to sell the Vivid 7sv with the GT52HW-TM transducer, SideVü, ClearVü, and traditional CHIRP sonar.
Special features:
- 7-inch display
- SideVü
- ClearVü
- Traditional CHIRP
- Built-in GPS
- Quickdraw Contours
2. Best Mapping and Side Imaging: Humminbird HELIX 7 SI GPS G4
The HELIX 7 SI GPS G4 is a strong choice if you want both side scanning sonar and more traditional built-in charting.
It combines CHIRP Side Imaging, CHIRP Down Imaging, and Dual Spectrum CHIRP sonar on a 7-inch display.
You also get internal GPS, Humminbird Basemap, and AutoChart Live.
This makes it particularly useful if your small boat is used for exploring different lakes rather than fishing the same few locations every weekend.
The display is still reasonable for a smaller console, but you get enough screen room to make split-screen mapping and sonar practical.
Humminbird currently lists the HELIX 7 SI GPS G4 at $599.99.
Special features:
- 7-inch HD display
- CHIRP Side Imaging
- CHIRP Down Imaging
- Dual Spectrum CHIRP
- Humminbird Basemap
- AutoChart Live
3. Best Compact Chartplotter: Garmin ECHOMAP UHD2 53cv
If your small boat has very limited console space, the ECHOMAP UHD2 53cv gives you serious mapping in a smaller 5-inch unit.
You get Garmin Navionics+ U.S. inland mapping, GPS, traditional sonar, and ClearVü scanning sonar.
That makes it useful for small aluminum boats and skiffs where you want a real chartplotter but simply do not have room for a large display.
The unit can also connect with Garmin's ActiveCaptain app and wirelessly share information with compatible ECHOMAP UHD2 units.
Current pricing for the 53cv with GT20-TM transducer is $449.99 at major U.S. retailers.
Special features:
- Compact 5-inch display
- Garmin Navionics+ mapping
- ClearVü
- Traditional sonar
- GPS
- Wi-Fi connectivity
4. Best Compact Budget Pick: Humminbird PiranhaMAX 4 DI
If you have a small jon boat and simply want a good look underneath the boat, there may be no reason to pay several hundred dollars for mapping and Side Imaging.
Check out: 5 Best Fish Finder For Jon Boats
The PiranhaMAX 4 DI keeps things basic.
Its 4.3-inch display provides Dual Beam sonar and Down Imaging, which gives you much more information about structure than an old basic depth finder.
It is also compact enough that you can mount it on a very small console, bench, or accessory rail without it becoming the biggest object in the boat.
Humminbird currently prices the unit at $189.99 and specifically describes the PiranhaMAX line as suitable for smaller boats.
Special features:
- 4.3-inch screen
- Down Imaging
- Dual Beam sonar
- Small footprint
- Simple controls
5. Best Basic Fish Finder: Lowrance Eagle 4x
The Lowrance Eagle 4x is for the person who does not need maps, Side Imaging, or complicated menus.
You install the transducer, power the unit, and use it primarily to see depth, fish, and what is happening in the water column.
The portrait display does not need much horizontal space, which is useful on small boats with very basic consoles.
Lowrance specifically designed the unit for kayaks and small fishing boats with limited space, and its wide-angle Bullet transducer gives you more coverage underneath the boat.
At $119.99 direct, it is also one of the cheapest current branded fish finders available.
Special features:
- 4-inch portrait screen
- Wide-angle sonar
- Very compact
- Simple interface
- Low price
You might also like these posts:
- Best Fish Finder Under $500
- Best Fish Finder for Kayaks Under $500
- Best Fish Finder for Kayaks Under $300
Conclusion
A small fishing boat does not require a small amount of sonar technology.
A compact 5-inch or 7-inch unit can still give you CHIRP sonar, GPS, mapping, Down Imaging, and even Side Imaging without overcrowding the boat.
The Garmin STRIKER Vivid 7sv is the best overall option if sonar coverage is the priority, while the ECHOMAP UHD2 53cv makes more sense if you want detailed mapping in a smaller package.
