9 Best Portable Fish Finders with GPS (November 2026)

The best portable fish finders with GPS include the LUCKY Kayak Portable Fish Depth Finder Water for simple handheld depth readings, the Humminbird 411660-1 Helix 5 Chirp GPS G3 for boat GPS and chartplotting, and the Reelsonar iBobber portable wireless bluetooth fish finder for phone-based shore fishing.

On this page (4 sections)

1. How we chose the best portable fish finders with GPS
2. Portable GPS fish finders for different fishing setups
3. What should you look for in a portable fish finder with GPS?
4. Which portable fish finder with GPS should you choose?

The best portable fish finder with GPS is the Deeper PRO+ 2 for anglers who need location-saving maps without installing a display on a boat. It creates bathymetric maps from shore, a dock or a bank, which suits people who move between spots on foot.

The Humminbird Helix 5 is the better fit for a boat-mounted GPS chartplotter, while the LUCKY handheld model keeps the setup simple. That split matters because the right choice depends more on where you fish than on screen size alone.

This group includes castable sonar, handheld transducers and compact boat units. Each type handles location, depth and fish information in a different way, and each one asks for a different amount of setup.

A portable fish finder with GPS can mean built-in GPS mapping, app-based location records or a boat chartplotter, so check that distinction before choosing. Built-in GPS keeps mapping in the sonar unit, while app-based records depend on a phone or tablet staying charged and connected.

Castable units suit shore, dock and bank fishing because they move easily in a tackle bag. Handheld units suit anglers who want a dedicated screen without a phone in the way, especially during short checks of depth and fish location.

Boat-mounted units suit small boats where a fixed display, keypad controls and a transom or thru-hull transducer can stay in place. They give a larger view while you move, but they need power, mounting space and more setup time.

If you want a broader starting point, compare our best portable fish finder guide. Anglers shopping for a boat setup can also see the best portable fish finder for a boat.

Use those guides to narrow the style you prefer, then come back to this roundup to check mapping, display and power details. Match the unit to the task first, and the specs will make more sense in daily use.

Our picks at a glance

1. 1
   Best for simple handheld depth readings

   LUCKY Kayak Portable Fish Depth Finder Water

   9.7/10 our score

   See it on Amazon
2. 2
   Best for boat GPS and chartplotting

   Humminbird 411660-1 Helix 5 Chirp GPS G3

   9.6/10 our score

   See it on Amazon
3. 3
   Best for phone-based shore fishing

   Reelsonar iBobber portable wireless bluetooth fish finder

   9.6/10 our score

   See it on Amazon

4. 4

   Deeper Start Fish Finder

   Best for simple castable scanning
   Check it
5. 5

   Deeper PRO+ 2 Sonar Fish Finder

   Best for portable GPS mapping
   Check it
6. 6

   Lowrance HOOK Reveal 5 SplitShot

   Best for portable CHIRP and imaging
   Check it
7. 7

   Lowrance Eagle Fish Finder

   Best for compact small-boat installation
   Check it
8. 8

   Humminbird PiranhaMAX 4 Fish Finder with Transducer

   Best for a ready-to-carry boat kit
   Check it
9. 9

   LUCKY Portable Fish Finder Handheld Kayak Fish

   Best for wired kayak sonar controls
   Check it

How we chose the best portable fish finders with GPS

The best portable fish finder with GPS should match your fishing location, display preference and need for saved fishing spots. Shore, kayak and small-boat anglers need different balances of size, power and screen space.

We compared sonar range, mapping, portability, power, display type and connection method. Those points cover what a unit can read, what it can save and how easy it is to carry or mount.

We scored highest the products that solve a clear portable fishing problem. Built-in GPS, useful app mapping, practical battery power or a compact transducer can matter more than a large screen alone.

A large screen helps on a boat but can get in the way on a kayak or at the bank. Portability is not just weight, since cables, batteries, mounting hardware and a phone add bulk in real use.

Mapping needs a close look. Built-in GPS can create maps without a boat chartplotter, while app-based saving depends on the connected device and app workflow.

Sonar range should be read with beam coverage and sensitivity in mind. Deep water needs a stated range that fits the lake or river, while shallow or murky water may need easier adjustments rather than more depth.

Power shapes the routine. Rechargeable and battery powered units suit moving between spots, while corded electric or 12 volt setups suit a boat where power is ready before launch.

Display type affects how you read the water. A phone app can show detailed maps and logs, a small LCD keeps things simple, and a boat display keeps controls within reach while moving.

We also looked at how each unit connects. Castable sonar ties to an app, handheld units tie to a wired or hull transducer, and boat units tie to a fixed mount and power source.

Our score weighs specs, features and buyer feedback against what you're shopping for. Products are listed from highest score to lowest, but the right pick depends on whether you fish from shore, a kayak or a small boat.

Use the score to find candidates, then use location, display preference and power access for the final choice. GPS mapping often adds complexity, and larger displays often add mounting and power needs.

Portable GPS fish finders for different fishing setups

The Deeper PRO+ 2 is the most direct match for portable GPS mapping, while the Humminbird Helix 5 suits a boat-mounted layout. The other products cover simpler depth reading, phone-based sonar and wired kayak use.

1

LUCKY Kayak Portable Fish Depth Finder Water: Best for simple handheld depth readings

9.7/10Our score

• Handheld LCD display
• 3 to 328 ft detection range
• 5 sensitivity levels
• 4 to 5 hours of battery use

This handheld LUCKY fish finder shows approximate fish location, water depth, weeds, sand and rocks. Its sonar transducer can attach to a kayak or boat hull.

See it on Amazon

Pros

• Wide stated depth range
• Feet or meters
• Fish and fish-school alarms

Cons

• Display is not waterproof
• Does not provide GPS mapping

The LUCKY Kayak Portable Fish Depth Finder Water is the highest-scoring choice for anglers who want a straightforward handheld unit. Its transducer can attach to a kayak or boat hull, and its stated detection range runs from 3 ft to 328 ft when the transducer is fully immersed.

The 2-inch LCD shows approximate fish location and water depth. It also displays short and tall weeds, sand and rocks on the bottom, while 5 sensitivity levels help you adjust the unit for clearer or more turbid water.

This model is battery powered and can work for at least 4 to 5 hours with a new battery. Battery save mode can extend use, which matters when you are fishing from shore or moving between spots.

The neck strap leaves both hands available on a kayak or boat. Keep the display away from splashes because it is not waterproof, and use normal mode rather than demo mode for actual sonar readings.

Choose it for basic depth and fish-location information without a phone. It does not save GPS locations, so choose another product if mapping is central to your trip.

2

Humminbird 411660-1 Helix 5 Chirp GPS G3: Best for boat GPS and chartplotting

9.6/10Our score

• Dual Spectrum CHIRP sonar
• Humminbird Basemap
• AutoChart Live mapping
• 5-inch color TFT display

The Helix 5 combines GPS navigation with Dual Spectrum CHIRP sonar and AutoChart Live. It suits anglers who want a larger boat-mounted screen and keypad controls.

See it on Amazon

Pros

• GPS chartplotter
• 10,000+ lakes and continental U.S. coastlines
• Eight hours of built-in AutoChart recording

Cons

• Needs corded electric power
• Less compact than castable units

The Humminbird Helix 5 Chirp GPS G3 is the strongest boat-focused option in this roundup. Its 5-inch color TFT display, keypad controls and transom-mount transducer suit anglers who want a fixed view while moving across a lake.

Dual Spectrum CHIRP sonar offers Wide Mode for broader coverage and Narrow Mode for more detailed scanning. The unit also includes Humminbird Basemap coverage for more than 10,000 lakes and continental U.S. coastlines.

AutoChart Live creates maps of depth contours, bottom hardness and vegetation while boating. It has 8 hours of built-in recording time, with compatibility for AutoChart Zero Line SD cards when you need more mapping capacity.

The package includes the control head, power cable, XNT 9 HW T transom-mount transducer, mounting hardware and gimbal bracket. Its corded electric power makes it less flexible than a castable unit, but more suitable for a dedicated boat installation.

Choose it for GPS navigation, larger-screen sonar and keypad control. For a wireless shore setup, consider the Deeper PRO+ 2 instead.

3

Reelsonar iBobber portable wireless bluetooth fish finder: Best for phone-based shore fishing

9.6/10Our score

• 135-ft depth range
• 10+ hours of rechargeable battery life
• Bluetooth connection
• iOS and Android app

The wireless iBobber sends sonar information to an iOS or Android app. Its small fishing-line mount suits shore, dock, ice and kayak use where a built-in screen would add bulk.

See it on Amazon

Pros

• Small 2 x 2 x 1 in body
• Fish and strike alarms
• Maps waterbeds and marks spots in the app

Cons

• Requires a phone or tablet for the display
• GPS functions depend on the app device

The Reelsonar iBobber is a compact option for anglers who want to cast sonar and view results on a phone. Its 135-ft depth range and 10-plus hours of rechargeable battery life suit long shore sessions, dock fishing and ice fishing.

The iBobber connects through Bluetooth to iOS and Android apps. The app shows depth-tagged fish icons color coded by size, and it can record waterbeds, mark spots, log water temperatures and save trip details.

Fish and strike alarms add useful alerts around docks and piers. The small 2 x 2 x 1 in body uses a fishing-line mount, so it takes little room in a tackle bag.

The main trade-off is the display. The iBobber does not have a dedicated built-in screen, so your phone or tablet becomes the viewing device.

Its location features also depend on the connected app device rather than a GPS chartplotter built into the sonar body.

Choose it when phone-based mapping and long battery use matter more than a large screen. Read how a castable fish finder works before choosing between app-based sonar units.

4

Deeper Start Fish Finder: Best for simple castable scanning

9.4/10Our score

• 165-ft casting distance
• 165-ft depth
• 40-degree sonar beam
• 6-hour battery life

Deeper START creates its own Wi-Fi connection to a free iOS or Android app. It automatically saves scans with time and location, making it useful for shore anglers and family trips.

See it on Amazon

Pros

• No external battery
• Night fishing mode
• Shows fish, depth, bottom contour and vegetation

Cons

• Does not include built-in GPS
• App device is needed to view scans

The Deeper START is a simple castable fish finder for recreational shore, bank, dock or kayak fishing. It casts up to 165 ft and reads down to 165 ft, with a 40-degree sonar beam for coverage.

The unit creates its own Wi-Fi connection, so it does not use your phone's mobile data for the sonar connection. The Fish Deeper app shows fish location and size, depth, bottom contour and vegetation on a compatible iOS or Android device.

START automatically saves scans with time and location. That helps you revisit a productive area, although the unit itself does not have the built-in GPS mapping hardware found in the Deeper PRO+ 2.

The battery lasts up to 6 hours, and a full charge takes 2.5 hours. A night fishing mode adds a viewing option for low-light sessions.

Choose it if you want an easy castable setup with saved scan locations. Move up to the PRO+ 2 if built-in GPS and bathymetric maps are the main reason you are shopping.

5

Deeper PRO+ 2 Sonar Fish Finder: Best for portable GPS mapping

9.2/10Our score

• Built-in GPS
• Up to 330-ft sonar accuracy
• Wide, mid and narrow beams
• Integrated Fish Deeper app maps

The PRO+ 2 is the strongest choice for portable GPS mapping because its built-in GPS creates bathymetric maps from shore, a dock or a bank. Its three beam options let you choose broad coverage or tighter target separation.

See it on Amazon

Pros

• GPS mapping without a boat-mounted display
• 0.4-in narrow-beam target separation
• Wi-Fi connection

Cons

• Uses an app for viewing maps
• More advanced than needed for basic depth checks

The Deeper PRO+ 2 is the best choice here for a portable fish finder with GPS. Its built-in GPS creates bathymetric maps from shore, a dock or a bank, then saves those maps in the Fish Deeper app.

Three sonar beams let you choose the type of coverage you need. Wide and mid beams cover more water, while the narrow beam gives target separation of 0.4 in according to the product information.

The unit reaches up to 330 ft of sonar accuracy and has a stated maximum measuring depth of 100 m. Its own Wi-Fi connection keeps the sonar link separate from normal mobile data use.

At 3.2 oz and 2.56 in on each side, it is easy to carry between fishing spots. The package includes the PRO+ 2 sonar, 2 attachment bolts, a neoprene pouch, a quick guide and a USB wire.

Choose it for portable GPS mapping and more control over beam selection. It is more advanced than the LUCKY handheld units, so basic depth readers may prefer a simpler interface.

6

Lowrance HOOK Reveal 5 SplitShot: Best for portable CHIRP and imaging

8.9/10Our score

• FishReveal
• SplitShot CHIRP and DownScan Imaging
• Genesis Live mapping
• 5-inch SolarMAX display

The HOOK Reveal 5 suits small-boat anglers who want a larger screen, CHIRP sonar and DownScan Imaging in one unit. Its Genesis Live feature creates custom contour maps, while preloaded C-MAP covers almost 4,000 U.S. inland lakes.

See it on Amazon

Pros

• FishReveal combines sonar views
• Autotuning sonar
• Daylight-visible SolarMAX display

Cons

• Needs 12 Volt DC power
• Less portable than wireless castable models

The Lowrance HOOK Reveal 5 SplitShot is a compact boat fish finder for anglers who want sonar, imaging and mapping on a larger display. Its 5-inch SolarMAX screen is designed for visibility in direct sunlight.

SplitShot combines wide-angle high CHIRP sonar with DownScan Imaging. FishReveal places fish targets and structure information together, while autotuning sonar adjusts settings as conditions change.

The unit includes preloaded C-MAP coverage for almost 4,000 U.S. inland lakes. Genesis Live creates custom contour maps, so it can help you build more detailed information for water you fish often.

The package includes the HOOK Reveal fish finder, SplitShot Skimmer transducer, mounting bracket, power cable, fuse and fuse holder, and corner clips. Its 12 Volt DC power and flush-mount design make it better suited to a boat than a walking angler.

Choose it for boat-based CHIRP, DownScan Imaging and map creation. For a portable GPS fish finder you can cast from shore, choose the Deeper PRO+ 2.

7

Lowrance Eagle Fish Finder: Best for compact small-boat installation

8.8/10Our score

• 4-inch IPS portrait screen
• 200 kHz Bullet Skimmer
• 44-degree beam
• Auto-Tuning Sonar

The Lowrance Eagle fits anglers who want a compact display for a kayak or small boat. Its portrait screen, twist-lock connector and broad 44-degree beam keep the setup practical where space is limited.

See it on Amazon

Pros

• Bright IPS viewing
• Simple fish icons and zoom
• Included Bullet Skimmer transducer

Cons

• No audible fish alarm
• The features do not include built-in GPS

The Lowrance Eagle Fish Finder fits a kayak or small boat where screen space is limited. Its 4-inch IPS portrait screen stays visible from wide viewing angles and through polarized sunglasses.

The included 200 kHz Bullet Skimmer provides a broad 44-degree beam for coverage below the boat. Auto-Tuning Sonar reduces the need to adjust settings, while fish icons, depth readings and zoom keep the display simple.

A twist-lock connector makes it easier to connect and remove the display. The compact portrait shape also works well where a wider screen would crowd the console.

The unit includes a fish finder, bracket and knobs, power cable, transducer, bracket and hardware, locking collars, fuse and fuse holder. Its stated maximum measuring depth is 500 ft.

Choose it for a compact wired sonar display with a broad beam. It does not provide built-in GPS in the features, so it is not the right choice if saving fishing locations is your main goal.

8

Humminbird PiranhaMAX 4 Fish Finder with Transducer: Best for a ready-to-carry boat kit

8.2/10Our score

• Dual Beam sonar
• 4.3-inch color TFT
• Portable carrying case
• 7 Amp Hour battery and wall charger

The PiranhaMAX 4 is a practical portable kit because it includes a carrying case, portable transducer, 7 Amp Hour battery and wall charger. Dual Beam sonar gives you a narrow view for detail or a wider view for coverage.

See it on Amazon

Pros

• Battery and charger included
• Soft-sided carrying case
• Tilt and swivel mount

Cons

• No GPS mapping
• Heavier than wireless castable units

The Humminbird PiranhaMAX 4 is a practical portable kit for anglers who want a fish finder, battery and carrying case together. Its 4.3-inch color TFT display is larger than the small handheld screens in this roundup.

Dual Beam sonar gives you a narrow beam for more detail or a wide beam for broader coverage. The tilt and swivel mount lets you adjust the viewing angle as you move around the boat.

The kit includes the PiranhaMAX 4 fish finder, portable carrying case, portable transducer, 7 Amp Hour battery and wall charger. That included power setup makes it easier to move between boats or store the system after a trip.

Its surface-mount design and 2.5 lb weight make it less compact than wireless castable sonar. It also does not provide GPS mapping, so use it for portable sonar rather than location saving.

Choose it when a ready-to-carry boat kit matters more than the smallest possible setup. For a phone-based wireless unit, the iBobber is easier to pack.

9

LUCKY Portable Fish Finder Handheld Kayak Fish: Best for wired kayak sonar controls

7.9/10Our score

• 2.4-inch TFT color LCD
• 328-ft depth detection
• 26-ft wired operating distance
• About 5 hours of use

This LUCKY handheld unit suits anglers who want wired sonar with adjustable brightness, sensitivity, zoom, depth alarms and fish alarms. The bracket can attach the sensor transducer to a boat or kayak.

See it on Amazon

Pros

• Rechargeable by USB
• Depth, temperature and fish-size displays
• Simulation and transducer modes

Cons

• No GPS mapping
• 26-ft wired operating distance

The LUCKY Portable Fish Finder Handheld Kayak Fish is a wired option for anglers who want more controls than a basic depth finder. Its sensor has a 45-degree beam at 200 kHz, with a stated depth detection range up to 328 ft.

The 2.4-inch TFT color screen can show underwater contour, water depth, water temperature, fish size and fish depth. Brightness, sensitivity, depth range, zoom, units and alarms are adjustable.

A 26-ft wired operating distance gives the transducer room to work around a kayak or small boat. The bracket can attach the sensor to the boat or kayak, while USB charging supports about 5 hours of continuous use.

The unit has simulation and transducer modes. Use simulation mode to explore the controls, then switch to transducer mode for actual readings on the water.

Choose it for wired sonar controls and a rechargeable handheld display. It does not include GPS mapping, so it is better for reading the water below you than saving exact fishing locations.

What should you look for in a portable fish finder with GPS?

A portable fish finder with GPS should have the right mapping method, viewing setup and power source for your fishing style. Start by deciding whether you need built-in GPS, an app that saves locations or only depth and fish information.

Built-in GPS or app-based location saving?

Built-in GPS is the clearest choice when you want the sonar unit to create maps without depending on a boat chartplotter. The Deeper PRO+ 2 uses built-in GPS to create bathymetric maps from shore, dock or bank.

App-based systems can still save useful locations. The Deeper START automatically saves scans with time and location, while the iBobber app can map waterbeds and mark spots through the connected phone or tablet.

What display works best for portable fishing?

A castable unit with a phone app is easiest to carry between shore spots. A handheld LCD is better when you want a dedicated screen without installing a larger display.

Boat-mounted units such as the Humminbird Helix 5 and Lowrance HOOK Reveal 5 offer larger screens and physical controls. They need more planning for power, mounting and transducer placement.

How does sonar range affect your choice?

A deeper stated range can help when you fish large or deep water, but it should not be the only buying factor. Beam angle, sensitivity, water conditions and transducer position affect the reading you can use in practice.

A wide beam scans more water, while a narrow beam focuses on a smaller area. The Deeper PRO+ 2 gives you wide, mid and narrow beams, while the LUCKY handheld models focus on simpler sonar readings.

How should you care for a portable sonar setup?

Keep the display, phone and power connections protected from splashes unless the product is designed for water exposure. Splashes are common on kayaks and small boats, so a dry bag or pouch can be part of the setup rather than an extra.

The LUCKY FFC1108 display is specifically not waterproof, so store it in a waterproof bag during kayak or boat use. That one detail can decide how you carry the handheld unit when waves, rain or spray are likely.

For app-based systems, keep the phone or tablet in a case that still allows a clear view and easy touches. Glare can make a screen hard to read in bright sun, so shade and angle matter as much as protection.

Rinse and dry the transducer after saltwater trips, keep cables from sharp bends and recharge batteries before the next outing. Salt residue and damp storage can cause trouble over time, even when a unit still works after one trip.

Check connectors before you leave, since loose or damp connections can lead to poor readings or a unit that will not start. A quick wipe and a full charge are simple habits that can save a session.

Store spare power where you can reach it, and do not rely on a low battery at the end of a long day. For app-based systems, also charge the phone or tablet that displays the sonar information.

Keep the sonar body in its pouch or case during transport, and keep it away from hard knocks in a tackle bag. Small castable units are easy to carry, but they still need care around edges, cables and charging ports.

If you move between boats, label cables and chargers so the right power source goes with the right unit. That small step can prevent a trip where the display works but the power setup does not.

For more power planning, compare the best portable fish finder battery. If you fish through winter, see the best fish finders for ice fishing for cold-weather setup ideas.

Cold weather can drain batteries faster and make small controls harder to use with gloves. Plan charge time, storage and screen visibility before the trip, not after you reach the water.

Which portable fish finder with GPS should you choose?

Choose the Deeper PRO+ 2 if you want built-in GPS mapping in a small castable unit. It suits shore, dock and bank anglers who want maps saved without a boat display.

Pick the Humminbird Helix 5 Chirp GPS G3 for a boat-mounted chartplotter with a larger display and keypad controls. Its transom-mount setup and corded electric power fit a dedicated boat layout better than a walking setup.

Choose the LUCKY FFC1108 for simple handheld depth and fish-location readings, or the iBobber if you prefer a wireless phone app. The LUCKY suits basic checks with a dedicated LCD, while the iBobber suits anglers who already use a phone for logs and maps.

For imaging and larger boat screens, the Lowrance HOOK Reveal 5 is the better fit. It suits small-boat anglers who want CHIRP sonar and DownScan Imaging on a 5-inch display, with 12 volt DC power.

The Lowrance Eagle fits a kayak or small boat where space is tight and a portrait screen can help. It is a wired sonar choice with a broad beam, but it is not the pick for built-in GPS.

The Humminbird PiranhaMAX 4 suits anglers who want a ready-to-carry kit with a case, battery and charger included. It is built for portable sonar use rather than saved GPS maps.

The Deeper START suits simple castable scanning from shore or a kayak, with saved scans through the app. It lacks the built-in GPS mapping hardware of the PRO+ 2, so it fits a lighter need.

The LUCKY wired handheld model suits anglers who want adjustable sonar controls in a handheld form. It can read depth and fish information below a kayak or boat, but it does not save GPS locations.

If your main goal is saved maps, start with built-in GPS or a boat chartplotter. If your main goal is a quick depth read, a handheld unit may be simpler.

If you are still comparing brands, review our guides to the best portable Lowrance fish finder and best portable Garmin fish finder. For a reality check on sonar value, read [Do Fish Finders Really Work?

What to Know](/do-fish-finders-really-work/).

Let your fishing spot decide first, then display preference and power access. That order keeps portable from hiding very different setups.

Our top 3 picks at a glance

1. 1
   Best for simple handheld depth readings

   LUCKY Kayak Portable Fish Depth Finder Water

   9.7/10 our score

   See it on Amazon
2. 2
   Best for boat GPS and chartplotting

   Humminbird 411660-1 Helix 5 Chirp GPS G3

   9.6/10 our score

   See it on Amazon
3. 3
   Best for phone-based shore fishing

   Reelsonar iBobber portable wireless bluetooth fish finder

   9.6/10 our score

   See it on Amazon

Frequently asked questions

What is the best portable fish finder with GPS?

The Deeper PRO+ 2 is the best portable fish finder with GPS in this group for shore, dock and bank anglers. Its built-in GPS creates bathymetric maps in the Fish Deeper app, and its wide, mid and narrow beams let you switch between coverage and target detail.

Choose the Humminbird Helix 5 if you want a boat-mounted GPS chartplotter instead.

Do portable fish finders have GPS?

Some portable fish finders have GPS, while others save locations through a phone app or provide sonar only. The Deeper PRO+ 2 has built-in GPS, and the Humminbird Helix 5 has GPS navigation and AutoChart Live.

Check whether GPS is built into the sonar unit or depends on a connected phone.

Can you use a portable fish finder from shore?

Yes. Castable models such as the Deeper START, Deeper PRO+ 2 and Reelsonar iBobber are designed for shore, dock or bank fishing.

They send sonar data to a mobile app, so keep the phone or tablet charged and within the device's connection range.

A handheld unit with a transducer can also work from shore when the transducer is immersed.

Is a castable fish finder better than a boat-mounted model?

A castable fish finder is better for mobility, shore fishing and small kayaks because it avoids a permanent display and mounting setup. A boat-mounted model is better when you want a larger screen, keypad controls, chartplotting or imaging while moving.

Your fishing location and installation space matter more than the label.

How deep can a portable fish finder read?

Depth depends on the model and the sonar setup. The products here range from the iBobber's 135-ft depth range to the LUCKY and Lowrance models with stated maximum depths of 328 ft and 500 ft.

Treat maximum depth as a reference point.

Water conditions, transducer placement and sensitivity settings affect the useful reading.