The short answer
Which fish finder to buy
Budget pickGarmin Striker 4$120Kayaks, canoes and small aluminum boats on any Tennessee water, and anyone who wants to mark brush piles on a lake they already know.
Best for most Tennessee anglersHumminbird HELIX 7 CHIRP MEGA SI GPS G4N$700Serious crappie and bass anglers on the big reservoirs; the unit to buy if side imaging is the point.
Top of the rangeGarmin LiveScope Plus LVS34 bundle$1,500Tournament and serious crappie and bass anglers who already own a Garmin head unit.Typical street price, rounded, October 2026. The live price is on Amazon. Affiliate links: buying through them pays this site a small commission at no extra cost to you. The picks are what works on Tennessee water, not what pays most.
Side by side
Fish Finders compared
Every fish finder on this page, cheapest first. Tap a model for its own page with the head to head cards and the Tennessee water it suits.
| Model | Typical price | Screen | Sonar | Maps | GPS | Max depth | Transducer power | Buy |
|---|---|---|---|---|---|---|---|---|
| Garmin Striker 4Garmin | $120 | 3.5 in colour | CHIRP traditional | None (waypoints only) | Yes | 1,600 ft | 200 W | Amazon → |
| Garmin Striker Vivid 7svGarmin | $400 | 7 in colour | CHIRP, ClearVu, SideVu | None (Quickdraw contours) | Yes | 2,300 ft / 500 ft scan | 500 W | Amazon → |
| Lowrance HOOK Reveal 7 TripleShotLowrance | $450 | 7 in colour | CHIRP, DownScan, SideScan | C-MAP Contour+ US inland | Yes | 1,000 ft / 300 ft scan | 500 W | Amazon → |
| Humminbird HELIX 7 CHIRP MEGA SI GPS G4NHumminbird | $700 | 7 in colour | CHIRP, MEGA Down and Side Imaging | Humminbird basemap, Navionics+ compatible | Yes | 1,200 ft / 200 ft per side | 500 W | Amazon → |
| Garmin ECHOMAP UHD2 93svGarmin | $1,000 | 9 in touchscreen | CHIRP, ClearVu, SideVu, LiveScope ready | Navionics+ US inland | Yes | 2,300 ft / 500 ft scan | 500 W | Amazon → |
| Garmin LiveScope Plus LVS34 bundleGarmin | $1,500 | Needs a compatible ECHOMAP or GPSMAP | Live scanning sonar, forward and down | From the head unit | From the head unit | 200 ft range | GLS 10 black box | Amazon → |
Typical street price, rounded, October 2026. The live price is on Amazon.
Affiliate links: buying through them pays this site a small commission at no extra cost to you. The picks are what works on Tennessee water, not what pays most.
Each one
The 6 fish finders, in detail
Garmin Striker 4
The default kayak and jon boat unit. CHIRP sonar that marks fish and bottom clearly, a GPS that saves waypoints and shows speed, and a screen you can read in sun. No chart, no side view.
- Cheapest GPS sonar that works
- Runs all day on a small lithium battery
Watch for: No lake maps and a small screen.
Garmin Striker Vivid 7sv
Side imaging on a 7-inch screen for under $400. Quickdraw draws your own contour map as you drive, which on a home lake is close to a chart. The step up from the Striker 4 is the screen and the side view.
- Side imaging at an entry price
- 7-inch screen
Watch for: No preloaded charts; you draw your own.
Lowrance HOOK Reveal 7 TripleShot
The one on this page that ships with lake maps. C-MAP’s US inland charts cover the Tennessee reservoirs, and FishReveal overlays fish arches on the DownScan picture so you do not have to read two screens.
- Charts included
- FishReveal is easy to read
Watch for: Side scan range is shorter than the Humminbird.
Humminbird HELIX 7 CHIRP MEGA SI GPS G4N
MEGA side imaging is the clearest side view at this size, and it is what the Kentucky Lake crappie guides run. Networking lets it share with a second unit and a Minn Kota trolling motor.
- Best side imaging at 7 inches
- Networks with Minn Kota
Watch for: Charts cost extra.
Garmin ECHOMAP UHD2 93sv
A 9-inch touchscreen with Navionics charts, side imaging and the ability to add LiveScope later. It is the unit most people end up at after outgrowing a 7, and the one to buy first if the boat is a keeper.
- Charts included
- LiveScope upgrade path
Watch for: Transducer bundles vary; check which one is in the box.
Garmin LiveScope Plus LVS34 bundle
Live sonar: fish moving on the screen in real time, 200 feet ahead of the boat. This is the transducer and black box; it plugs into a compatible ECHOMAP or GPSMAP. It is the reason tournament results changed on Chickamauga and Guntersville.
- The standard for live sonar
- Works with the ECHOMAP above
Watch for: Needs a head unit, a mount and a dedicated battery.
How to choose
Choosing a fish finder for Tennessee water
A fish finder on a Tennessee reservoir does two jobs: it shows the bottom and the bait, and it keeps you off the stumps. The big TVA and Corps lakes are flooded river valleys with standing timber, old roadbeds and channel ledges, so a unit with mapping earns its keep as much as the sonar does.
Screen size matters more on Tennessee water than most buyers expect. Side imaging on a 5-inch screen shows the ledge, but a 7-inch screen shows the ledge, the bait ball and the brush pile at the same time, and that is the difference between marking a spot and understanding it. Seven inches is the sensible floor for a boat; 4 or 5 is fine on a kayak or a jon boat.
Mapping is the second decision. Kentucky Lake, Chickamauga, Watts Bar and Norris all have detailed charts, and a unit that ships with lake maps saves a second purchase. Entry units like the Striker have GPS for waypoints but no chart, which is enough if you fish one lake you already know.
Side imaging and live sonar are the upgrades that change how you fish. Side imaging finds brush piles and schools of crappie off the bank at Kentucky Lake and Reelfoot. Live sonar, Garmin’s LiveScope and the equivalents from Lowrance and Humminbird, shows fish moving in real time and is now standard on tournament boats on Chickamauga and Guntersville. It is also the most expensive line on this page.
Transducer mounting is the detail that gets skipped. Transom mounts suit aluminum boats and kayaks; a trolling motor mount puts the picture under the bow where you cast. Check the mount before the screen size.
Every fish finder here was picked for Tennessee water first and price second.
Where you’d use it
Tennessee water where a fish finder earns its keep
Each page lists every public access point, the fish that swim there and the live conditions.
More gear compared
Other gear compared for Tennessee
Common questions
Fish Finders questions from Tennessee anglers
Do I need maps for Tennessee lakes?
If you fish the big reservoirs, yes. Kentucky Lake, Chickamauga, Watts Bar, Norris, Cherokee and Dale Hollow all have detailed contour charts, and the ledges and creek channels are where the fish hold in summer. A unit with GPS but no chart works on a lake you already know.
Is side imaging worth it here?
On the crappie and bass lakes, yes. Brush piles and bait schools off the bank are what side imaging finds, and that is how most of the crappie on Kentucky Lake and Reelfoot are caught. On small rivers and ponds it is less useful.
What is live sonar and do I need it?
Live sonar (Garmin LiveScope, Lowrance ActiveTarget, Humminbird MEGA Live) shows fish moving in real time ahead of the boat. It is the standard on Tennessee tournament boats now, and it is the most expensive item on this page. A recreational angler on a mid size lake does well without it.
Will a kayak fish finder work on a bass boat?
It will work, but the screen is small and most kayak units skip mapping. Pick by the boat you fish from most.
How deep are Tennessee lakes?
Norris and Dale Hollow run past 150 feet near the dams; Kentucky Lake and Chickamauga are mostly under 60 feet. Every unit here reads far deeper than that, so depth rating is not a deciding factor.
What is the difference between the cheapest and the most expensive fish finder here?
$1,380. The Garmin Striker 4 (screen: 3.5 in colour) the default kayak and jon boat unit. The Garmin LiveScope Plus LVS34 bundle (screen: Needs a compatible ECHOMAP or GPSMAP) live sonar: fish moving on the screen in real time, 200 feet ahead of the boat. Screen size matters more on Tennessee water than most buyers expect.
Which fish finder brand is best?
This page has Garmin, Humminbird, Lowrance. Garmin makes the top of the range here and Garmin the budget pick; the brand matters less than the spec table above, where the rows that differ are the ones to decide on.
What does a good fish finder cost?
The 6 here run from $120 (Garmin Striker 4) to $1,500 (Garmin LiveScope Plus LVS34 bundle). Humminbird HELIX 7 CHIRP MEGA SI GPS G4N at $700 is the one that suits most Tennessee anglers. Prices are typical street prices; the live price is on Amazon.
Are these affiliate links?
Yes. Each link goes to Amazon with this site’s tag and pays a small commission at no cost to you. The picks are what works on Tennessee water.
Can I buy locally instead?
Yes. Bass Pro in Memphis, Nashville, Kodak and Chattanooga and the marinas on the big lakes stock most of this; every county page on this site lists the shops with directions.
How were these fish finders chosen?
6 models that cover the range from the budget option to what the guides and tournament boats run, each one a product that has been on the market long enough to have a track record on Tennessee water. Transducer mounting is the detail that gets skipped.
How often are prices updated?
The figures on this page are typical street prices, rounded. When the live price feed is on, every price on the page is refreshed from Amazon every two weeks and the date shows next to it; either way the buy button opens the current listing.
Keep going
More Tennessee water, and who fishes it
Every guide and charter on this site is listed by the water they run, so you can call the captain direct. Licences, limits and the state record list are one click away too.