10 Best Fish Finders For Kayak (Gps Combo, Portable, Waterproof) [2020 Reviews & Guide]

Last Updated on December 2021 


Table of Contents

best Fish finder

Have you ever experienced yourself in a site you just knew had fish but spent a great part of your time with no gain? 

Or mentally and physically exhausted of casting your rod out of the kayak? Or sometimes wishing to get the slightest clue or hint? 

The answer would be yes and that’s the reason you are here for a perfect device that can bring great results in a short time “a Fish Finder”. 

With its CHIRP sonar technology, multiple frequencies, GPS function, 360-degree area coverage with great depth, and high-resolution screen, you can now easily find what’s going around and under your kayak.

There are many Fish Finders available in the market for good money, and choosing the best fish finder depends a lot upon your fishing site, so how to look for the right one? 

There are some features to consider in a fish finder, this includes the material used, price, technology, screen display size, resolution, battery life, power, its working, installation, and other things also. 

These features are really important and if you keeps these things in mind then you will find no difficulties in choosing the right fish finder.

So, let’s start with a fundamental understanding.

Features To Consider in a Fish Finder (for Kayak or Small Boat)


A transducer is a gadget that transforms one form of energy into another form. Generally, a transducer converts a signal in one form of energy to a signal in another form.

Transducers are usually utilized at the boundaries of control systems, measurement, and automation where electrical signals are converted from other physical quantities (torque, force, light, motion, energy, position, etc).

The procedure of converting one form of energy to another is known as transduction.

Transducers Material

Lead Zirconate Titanate

Lead zirconate titanate (the acronym PZT is trademarked by Clevite Corp.) was discovered to have qualities superior to nickel and because of this is largely replaced in sonar and most of the other applications.

Modern Materials

The structured capacity of nickel and piezoelectric ceramic sonar began to reach over 24 years ago. At the same time Naval Ordnance Laboratories (NOL), now called as Naval Surface Warfare Center (NSWC) began to produce metal alloys of the lanthanide elements with “giant” magnetostrictive qualities. 

These materials had bigger acoustic power and other potential such as broader bandwidth, low frequency, and greater reliability.


TERFENOL-D is an intermetallic alloy of the lanthanide elements terbium and dysprosium joined with iron (Fe) and developed as a near-single crystal. 

The name combines the signs for the elements with NOL, brought from the facility of origin. This material is generally supplied to producers ready to assemble into devices, without the need for further procedure.

CHIRP Encoder

CHIRP is an abbreviation for “Compressed High-Intensity Radar Pulse.” CHIRP a fancy way of saying it, this ley you will show those fish that basic sonars can’t. Did you like it? 

A standard or a basic sonar sends one single frequency at one time because feedback from one single frequency is bounded, the resolution and clarity of the sonar imagery will also be bounded. 

But the CHIRP sends a continuous sweep of frequencies ranging from low to high, interpreting these frequencies one by one upon their return. Since this continuous sweep gives CHIRP a much broader range of information, a CHIRP sonar can make much clearer, higher resolution imagery.

CHIRP is the sonar technology that fish finders use. Having a good quality chirp transponder implies superior fish identification.

At single frequencies, fish can only be recognized as a single fish at some distance from each other. CHIRP makes it happen to display closely spaced fish as single fish-sickles.

GPS map function

Only with a map featured on the fish finder, you can find and mark the best fishing spots. 

Many of the proprietary map features record the depth while paddling, giving an amazing new overview of underwater hills, sloping edges, and other strata. 

GPS features enhance safety, especially during the bad fishing times, when dark clouds come together. Those who can afford GPS and a nautical chart should invest their money in it.


When the transducer is out of the water and the unit is working in normal mode, the unit is doing its work and trying to find the bottom and report that back as a digital depth reading.

Because there is no true sonar returns it starts searching for the bottom. As it starts finding a bottom that doesn’t exist as the transducer is out of the water and it will pick up on these tiny noise signals and report them back as the bottom because it is the strongest signal accessible. If that number comes to be correct, it is simply a coincidence.

In summary, there is no digit depth reading that has any importance when the unit is out of the water and it is not suggested to test your product in this manner also. 

Doing this can damage the sonar circuit in your unit and this would not be covered under warranty by the manufacturers.

Cone Angle

A cone angle that has a broad opening makes it easier to identify numerous obstacles and get clearer imaging of objects underwater. 

The narrowest possible opening angle makes it possible to acknowledge the true soil structure present underwater reasonably and to find soil depressions.

Mounting Space

The transducer is mounted so that the swinging elements inside are vertical to the waterline. There are four usual ways to mount a fish finder transducer. These all have their unique advantages and disadvantages.

Through the Hull

This mount consists of cutting a hole in the hull of the kayak and fitting the transducer inside so that it comes in direct contact with the water. because the transducer is mounted through the bottom of the kayak, the ultrasonic pulse waves and returning echoes are too clear. However, the caveat is required to cut a hole through the hull, which is something that deters a lot of kayak owners.

In-Hull / Shoot-Through

The in-Hull mounting means that the transducer is mounted against the bottom of the kayak, fastened with silicon in a special case. 

This case is later filled with a type of oil to ensure that the transducer is in full touch with the hull. 

It is very essential to choose a proper mounting spot, otherwise, air turbulence from the bottom of the kayak might cause interference.

The disadvantage with In-Hull mounting is, at first it does not work with the kayaks that have hulls constructed of aluminum, steel, wood, or any material that absorbs a lot of the ultrasonic pulse waves.

Also, the signals are transferred through the hull, a certain amount (20-40%) of the signal be lost, resulting in lower performance and capability to detect fish. 

Transom mount

For those with fish finders sporting the “ACCU-FISH™” functionality, it is suggested to mount the transducer utilizing Through-Hull or Transom mount.

Transom mount can be normally used in smaller kayaks, the transducer is mounted beneath the waterline at the transom. 

This technique of mounting the transducer is well-known due to its simplicity, but it has the risk of interference from aerated water originating from the propeller.

Side mount

The final way to mount the transducer is a side mount, it is an improvised way to mount the transducer on a long pole. While traveling to and from fishing grounds, the pole is taken up from the water. 

The advantage here is for kayaks owners who do not wish to make “Through Hull” installations, it offers great performance while being very simple and easy.

Portable vs Fixed

Relying on your style of fishing, you have to decide whether you need a portable fish finder or the one that is fixed to your kayak. 

If you fish a lot in rental kayaks or other people’s kayaks, then a portable unit would be good for you.

There are various portable fish finder kits available on the market from all the top brands.

Wifi/Castable fish finders have also newly become famous. 

They are good for land-based fishermen who don’t have access to a kayak or small boat. 

If you have your own kayak, go with a fixed fish finder where the transducer is mounted at the rear of the hull of the kayak.

Display Size & Resolution

Purchase a fish finder with the biggest display you can afford. 

The Displays range from 3.5 inches to 16 inches. You can look at more of the information collected by your fish finder at one time. 

For a better mid-range screen size, select a 9-inch screen. Ensure that you don’t lose more essential features for viewability.

You also have to check pixels. Sometimes, the quality of the image goes poor as the screen size expands. For crisper and sharper images, it’s worth investing your money in a higher-resolution screen.

Screen resolution, combined together with screen size will be an excellent factor for how clear your display is. 

The less expensive models will normally have smaller screens, which make them better selection for backup or secondary fish finders.

Single, Dual and Multiple Frequencies

Frequencies are also a great factor in transducers. 

Most of the transducers will come with either 50, 83, 192, and 200 kHz frequencies, all are in direct relation to the cone angle. 

Various dual frequency transducers come with both 20 and 60-degree cones. 

Higher frequencies, like 192 and 200 kHz perform the best in shallower areas, while the low 50 kHz transducers are best for the use in deep water, like for professionals and commercial usage.

Always keep in mind, the higher the frequency, the more detail pop-ups on your display. This happens because there are many more sonar waves being thrown out and received by the transducer. 

So if you are normally fishing in shallower waters, this is the way to go. 

There are some fish finders even capable of a whopping 400+ kHz and multiple frequencies which will show incredibly clearer and detailed images and will let you switch between them for wider, general, more detailed views.


Fishfinders and other electronics need electricity to work. 

On kayaks, electricity is provided through the batteries installed in the battery compartment. 

Excluding special super compact fish finders, mostly fish finders utilize DC 12-24 volt power supply. As long as the voltage is between 12 and 24 volts, the fish finder will work greatly. 

Smaller kayaks or boats will normally come with one DC 12 volt battery. 24 volt can be used for kayaks with two DC batteries in a serial connection.

The battery is attached to the main switchboard, and the power cable from the fish finder is attached to the same switchboard. 

A commonly done practice is to install manual switches on the power cable in a way to turn on or off the power to the fish finder unit faster. 

It is extremely important to remember to first turn off the fish finder unit before cutting down the power, in order to prevent malfunctions.

For kayaks using 24-volt batteries, the fish finder should always be connected to the switchboard first.

Colored vs Black & White

Color screens are the new product in electronics. They offer you greater detail, showing up to millions of colors compared to just 265 shades of gray. A color fish finder will make fish and underwater objects truly ultra-clear and can be identified very easily.

This makes it much easier and simpler for you to see what’s going on underwater. Color screens are more visible in bright light than black & white screens, and the color screens will be outstanding if the weather is dark or cloudy.

Black & white models are still accessible, but unless that is the only feature set that fits in your pocket at the time, you will get much more enjoyment and convenience from a color screen.

3D Sonar

Down and side imaging has a few disadvantages

First, you need to be back and forth to get a clear image. 

The second problem is that you can only watch what you have already passed over with your kayak. It’s great to see the design, but it doesn’t do much good if you’ve already passed it.

An innovative solution came out to this problem, called 360 imaging (3d sonar). 360 Imaging utilizes a rotating transducer to sweep in a full circle around you and your kayak. 

This lets you watch in front, behind, and to all sides without moving at all. The rotating transducer refreshes the screen even at the time you are stationary, making you watch the targets in front of you to cast. 

Now you can see clearly in detail casting targets such as pockets and turns into the weed-line, as well as bush, trees, and stumps.

Water Resistance

Well, one more necessary feature consideration. If you are going to mount your fish finder on a smaller open kayak then water resistance is going to be very crucial. 

Always check the IPX or JIS ratings. These are more or less the same kind, but each of them determines a specific unit’s level of resistance to water.

A rating of four means a gadget is safe from splashing water so that it won’t fare well on a kayak for instance. 

An IPX or JIS rating of five or six means a unit can stand low to high-pressure jets of water. 

If the rating is seven, you can submerge your fish finder up to 10 feet for 30 minutes. 

In the end, a rating of Eight can be underwater for a longer period of time. The rating makes all the difference and lets you know how and where you will utilize a fish finder.

Battery Life

Upon return to shore or a larger kayak, the fish finder’s battery needs to be recharged again. 

So, if one goes for a longer trip lasting 9-10 hours, the required theoretical battery capacity will be from 15 Ah to 18 Ah, while if you prefer shorter trips from 3 to 4 hours, then the required theoretical capacity is 4.5 Ah – 6 Ah.


It’s important to pay attention to the price of the fish finder. Obviously, you have to be very careful about which one you should purchase based on the price that it is sold at. 

Try to find a fish finder with a better price to feature ratio. A normal fish finder that will work well starts around $100 and the price goes on depending upon features and technology used.

So, After considering above mentioned features I’m sure that you won’t find difficulties in understanding what to look in a fish finder. 

However, Few more things are yet to be understood. So, Lets have a quick look at them.

Depth Finder Vs Fish Finder

A “depth finder” or “digital depth finder” is the same as a screen of depth information. This is a standard display of the depth of water under your kayak in a digital read-out. 

This is normally used for shallow-water depth detection when a graphic screen is not required. 

A “fish finder” utilizes a similar transducer and actually gives a graphic, video image of the water and bottom under the kayak. 

Also, it gives several seconds or minutes of history. The video image will show you any objects or obstacles detected by the transducer. This will involve the bottom as well as fish, wrecks, etc and it would be useful to a fisherman.

Down imaging vs side imaging



Down-imaging is usually more helpful when fishing in deep waters. Because you are searching for the fish in the vertical rather than horizontal plane, down-imaging fish finders are suitable for these kinds of conditions.

These fish finders continue to make reasonable images, even if you are traveling at high speed. 

But if compared side-imaging fish finders perform better at slower speeds.


Most of the down-imaging fish finders only depend upon one transducer. This gives lesser information for the computer to perform on and therefore produces a lower-resolution picture.

These fish finders fail to give you as much horizontal information as side-imaging fish finders do. 

For example, you may be able to discover a big fish somewhere under your kayak around 20 feet deep but you can’t determine what side of the lake it is. It might be 60 yards to your left or 60 yards to your right or anywhere in between the lake.

Side imaging


Side-imaging fish finders let you scan more water in less time

Since they look in two divergent directions at the same time, they cover twice as much water as down-imaging fish finders do

These fish finders offer a better image of the marine environment, as they provide a great point-of-view than down-imaging fish finders.

For example, if you are operating a down-imaging fish finder, various piles of rocks to the right and left of your kayak shows up as a single patch of rocks. But a side-imaging fish finder shows the rocks as being in distinct groups on either side.


Side-imaging fish finders are more costly than down-imaging fish finders. Although they are worth the additional expense, fishermen live in the real world and every individual has a budget.

The drawback of this unit is that these fish finders do not give a defined image of objects under your kayak. 

Best Fish Finders Brands on the Market

Garmin Fish Finder

Garmin fish finders consist of built-in CHIRP sonar and CHIRP scanning sonar capability plus GPS. Now you have a great way to find fish and also you can mark the spots to return it later. 

In addition, you can mark kayak’s docks and ramps so that you can find your way back to where you started.

Lowrance Fish Finder

Lowrance fish finders produce easy-to-use features, featuring the latest GPS and sonar technologies. Whether the pursuit is for walleye, bass, striped bass, or crappie in ponds, lakes, or rivers.

Humminbird Fish Finder

From casual to tournament fishermen, Humminbird fish finders will revolutionize how you fish with its industry-defining sonar technologies such as Down & side Imaging, MEGA Imaging, and much more. 

For more than 40 years this company has worked with one goal in mind to form difference-making days for fishermen out on the water. Day-after-day, year-after-year, Humminbird has done just that.

Deeper Fish Finder

Deeper Smart Sonar is a wireless, castable echo-sounder, works really well with Android smartphones, IOS, and tablets. Wi-Fi connection permits to magnify both the distance between the Deeper Smart Sonar and the device holder up to 330 ft / 100 m and the depth range up to 260 ft / 80 m

Must-Know Topics For Kayak Fish Finders

How Does a Fish Finder Work?

How do fish finders work? Fishfinders utilize transducers to send out sonar signals. When this signal reaches an object under the water, the sonar wave takes an estimate of the size of the object and the depth. The object could be the floor, fish, or something like a log or a rock.

The sound wave is returned to the device like an echo, and the information is fed into the apparatus. The information which is fed back to the instrument is used to create an image of what is going on in the water beneath you. This image is then displayed live on your screen for you to interpret.

Lots of fish finders use more than one frequency to give you a better view depending on the situation. Higher frequencies give you a narrower Cone Angle, providing an excellent level of detail. Lower frequencies allow greater depth penetration, but the longer-range will limit sensitivity.

Most fishfinders have built-in GPS Capabilities, enabling you to plot your location on waypoint maps and easily navigate around. These devices also provide information such as the temperature of the water and the speed you are traveling at. This information combined will help you get the most out of your fishing experience.

If you are new to using a device like this, you may want to read up on how to read a fish finder. Interpreting the information you see on the screen before you, will take some getting used to if you aren’t a seasoned user. But once you have got the hang of it, you will be fishing like a pro in no time.

Reading of a Sonar Fish Finder? Easy or Technical

Every art is a skill that is learned. As for reading a fish finder is an art, here are a few simple steps that will help you out. These steps are simple and don’t need more explanation.

  1. Identifying Fish.
    1.  Fish icons.
    2.  Fish arches.
  2. Judging Fish size. 
    1. Fish Arch length
    2. Fish Arch width
    3. Half or full Arches
  3. Finding baitfish and trophy fish on your fishfinder.
  4. Identifying different types of underwater structure.
    1. Depression
    2. Weeds and vegetation
    3. Points
    4. Other underground objects or obstacles.

So, reading the fish finder is not too technical, it just needs some basic to follow and of course, you will get the screen reading in your manual that comes along with your fish finder so, you don’t have to be confused about it.

Can You Use a Fish Finder with Your SmartPhone?

 Yes, some products are there to allow a smartphone to act as a fish finder. It needs to purchase the app and some kind of portable transducer. 

Do All Fish Finders Work For Shore Fishing, Ice Fishing, Lake Fishing, River Fishing?

Yes, all the fish finders can work for shore fishing, ice fishing, river and lake fishing, or any other kind of water body. 

It’s not always that you would find all the fishing site options in one fish finder. Each fish finder is built for some specific location.

But you can get the fish finder for all the above-given sites. You have to see where you are going to often use the device. However, these devices will somehow work apart from their dedicated sites but for the excellent results, choose a unit that is specifically meant for the given area.

In Case After getting your Fishfinder you need help with its installation which is not too technical. you can read the below section. Else you can Skip this part. Jump to Best Fish Finders Products.

Quick Installation Guide

Installing a fishfinder on a kayak can be sometimes very struggling, especially if you are using it for the first time. Once you find a good spot for your fish finder, you need to work on the proper installation to ensure that the device will function efficiently. Some fish finders come with an installation kit for easy and quick set-up. 

The following step-by-step installation process will help you out. 

Step 1 – Find a suitable spot

Search for a suitable spot where you want to set up your fishfinder. I suggest you choose for a spot that you can easily reach or access and somewhere that won’t be in your way as you paddle. 

The next thing to look for is where you would place the transducer. consider a flat surface at the bottom of your kayak and make sure it is a good spot for the transducer.

Keep that spot clean and free from any debris and dirt. You can use sandpaper to rough it up. This will keep the transducer pad intact on the bottom of the kayak or boat.

Step 2 – Put the install pad

Using a thin layer of install pad, apply it to the nether part of the setup pad. Ensure that the install pad lined up in parallel to the direction of the transducer or it should be heading towards the front of the kayak.

You can use glue to apply the install pad to your designated spot. Let it dry for up to 20-24 hours. When the install pad gets completely dry, the next thing to do is mount the transducer at the bottom of the kayak.

Step 3 – Position the transducer

Use silicon or goop to position the transducer. Make sure to leave out the bubbles to deter any miscalculations in signals and readings. After this, leave the transducer to dry completely. This will take up to 48 hours.

Step 4 – Mount the fish finder

When you are completely done with the transducer, the next thing is to set up the fish finder on your kayak. Search for an ideal spot where you want to mount the fish finder. The spot should be flat to keep it secure and somewhere where it will keep you comfortable and relaxed when kayaking.

Use a power drill to make a hole on the surface where you will position the base of the fish finder. Take some mount screws and check if they would fit.

Step 5 – Strengthen the screws

When the screws go through, use a washer to tighten or strengthen the screws, keeping them intact at all times. Remove the basic head of the fish finder. Place the head unit of the fish finder on the top area of the mounting spot. Secure them with the mounting screws.

Step 6 – Keep the cables and wires organized

Move to the base of the fish finder and reassemble it to the head unit. Search for a convenient place where the wires and power cables of the transducer would go through. Put them through a grommet to keep the wires and cables neat and organized.

Step 7 – Install the grommet

Make a hole and then install the grommet by a power drill. This is where the wires and cables would go through. To run the Unit, you have to set up the power line first and the battery connector.

There are two positive leads or red wires. You have to strip the ends of these wires and connect them to the battery. Do this same with the black wires or negative leads.

Step 8 – Let the fish finder run

Plug the wire into the back of your fishfinder and let the device run! You’re all set now!

The installation process given above is one of the ways you can use it to install your fishfinder. The best way is to refer to the manufacturer’s manual and use the installation kit that comes along it if there’s any. 

Top Rated 10 Best Fish Finders Reviews (Castable & Portable)

Humminbird 410940-1 HELIX 7 CHIRP MDI (MEGA Down Imaging) GPS G3 Fish Finder

The Helix comes with a 7-Inch screen with an 800H x 480V resolution color TFT display giving you a great combination of brightness and contrast. 

The mega down Imaging gets unprecedented underwater clarity with coverage down to 125 feet beneath your kayak. 

This fish finder is powered by our proprietary, Low Q CHIRP transducer, Dual Spectrum CHIRP gives two ways to search: narrow mode for maximum detail and wide mode for maximum coverage.

You can add or remove detail, temperature, and turbulence, account for water depth, even watch lure presentations with two display modes. 

The helix 7 consists of a transducer and mounting hardware, gimbal mounting bracket, and power cable.


  1. Portable – Yes
  2. GPS – Yes
  3. Waterproof – Yes
  4. Colored display – Yes
  5. Frequency type – CHIRP
  6. Screen Size – 7 inch
  7. Resolution – 800 X 480
  8. Maximum depth – 125 ft


  1. Gimbal mount and compatible with other mounting systems.
  2. Able to map and remap water bodies.
  3. Plenty of sonar functions.
  4. Great depth ability.


  1. No cover for storage and transportation.

Lowrance HOOK2 5 – TripleShot Transducer & US Inland Lake Maps Installed 

The hook2 5 – 5-inch Fish Finder comes with the US Inland Lake Maps and TripleShot Transducer. It features auto-tuning sonar and phone-like menus providing you more time to spend fishing and less time dealing with settings.

This fish finder gives a wide-angle CHIRP sonar cone offering you double the coverage of traditional fish finders. It has an easy setup, a single transducer can be mounted inside the hull, on the transom, through a scupper hole or on the trolling motor. 

It has a wide sonar view and comes total with a TripleShot transducer which provides you SideScan sonar (up to 300′ to each side), DownScan sonar (straight down), and CHIRP sonar (fish arch) views.

The Hook2 is upgradable means it comes with an SD card slot for mapping and software upgrades, future features and third-party maps to be added.


  1. Portable – Yes
  2. GPS – Yes
  3. Waterproof – IPX 7
  4. Colored display – Yes
  5. Frequency type – CHIRP
  6. Screen size – 5 inch
  7. Resolution – 600 X 320
  8. Maximum depth – 150 ft


  1. Easy to install and use.
  2. Provides side scanning and down scanning.
  3. Nice image quality.
  4. Good selection of maps.


  1. Few viewing modes.

LUCKY Portable Fish Finder Transducer Sonar Sensor

The Lucky portable with 2.4inch TFT color LCD screen can detect and display underwater contour, water temperature, and fish size with depth. This device has two user modes: Wireless/Simulation. You can go fishing in wireless mode and can try all functions in simulation mode.

The wireless sonar transducer consisting of a fish attractive lamp makes it easier to detect fishes. It also comes with a transparent replacement cover, to see where the sensor is even in the dark.

This fish finder supports 196FT(60m) wireless operating range (There is an antenna on the left top of the handheld, you can pull it out), and 147FT(45m) depth detection. You can go fishing in different ways with it. 

There are many features settings available such as detect sensitivity, screen brightness, zoom, depth range/alarm, fish alarm, units alter, fish icon, and language choices.

The Lucky portable comes with a USB cable for charging and can last 4 hours with a full charge and the sonar sensor can last 10 hours with a full charge.


  1. Portable – Yes
  2. GPS – No
  3. Waterproof – Yes, but not for the inner cavity.
  4. Colored display – Yes
  5. Frequency type – Sonar
  6. Screen size – 2.4 inch
  7. Resolution – 240 X 960
  8. Maximum depth – 147 ft


  1. Super lightweight.
  2. Icons are visible on the screen.
  3. You can watch water depth as well as fish size.


  1. The screen size is very small.

Humminbird 410150-1 PIRANHAMAX 4 Fish Finder

The PIRANHAMAX 4 has a Sharper image and Sharper teeth. With modern styling and large, 4.3″ color LCD, this fish finder will provide you a fresh perspective on what’s below your kayak. 

It has an easier-to-use interface, unlocking the power of optional Down Imaging, Fish ID+, depth alarms, fish alarms, and zoom has never been simpler. It features a dual Beam Sonar, to select from a narrow and a wide beam for great detail or a generous coverage area, helping you to identify fish, contours, and structure. 

The fish finder’s down Imaging helps you to get a clear view of what’s going below your boat. As you patrol the water, you’ll see brush, bridge pilings, timber, rocks, and any other structure pop with great detail.


  1. Portable – Yes
  2. GPS – No
  3. Waterproof – IPX 7
  4. Colored display – Yes
  5. Frequency type – Dual-beam sonar
  6. Screen size – 4.3 inch
  7. Resolution – 480 X 272
  8. Maximum depth – 320 ft


  1. Waterproof.
  2. 600 ft depth capability.
  3. Dual-beam sonar.
  4. Various functions included.


  1. No upgrade option available.

Garmin Striker 4 – GPS Fishfinder with CHIRP Traditional Transducer 

The Garmin striker’s clear vu scanning sonar shows you more of what under the water around your kayak. This high-frequency sonar provides close photographic pictures with detailed representations of structure, objects, and fish.

The power of simple gives a keyed interface with dedicated buttons. This gadget is easy to use and install. It is available in 3.5, 5, and 7-inch display sizes and the water rating of IPX7.

The waypoint map is used to easily view, mark, and navigate to spots such as brush piles, docks, and stumps. It has a maximum depth of 750 feet saltwater and 1,600 feet freshwater. The current draw is 12Volt and 0.23 Ampere.

The built-in flasher views the sonar data in the classic flasher format making it good for vertical jigging or ice fishing.


  1. Portable – Yes
  2. GPS – Yes
  3. Waterproof – IPX 7
  4. Colored display – Yes
  5. Frequency type – CHIRP
  6. Screen size – 3.5 inch
  7. Resolution – 480 X 320
  8. Maximum depth – 1600 ft


  1. CHIRP sonar.
  2. It comes with a high-sensitivity GPS.
  3. Various sonar functions.
  4. 77/200 kHz capable transducer with a temperature sensor. 


  1. No unit cover is given.
  2. Limited network options.

Lowrance HOOK2 4X 

The HOOK2 4x features auto-tuning sonar and phone-like menus offering you more time to spend fishing and a short time dealing with its settings. This fish finder gives a wide-angle sonar cone giving you double the coverage of traditional fish finders.

It comes with a single transducer that can easily be mounted on the transom, inside the hull, on the trolling motor, or through a scupper hole. The transducer includes a Bullet Skimmer transducer that gives you traditional 2-D sonar (fish arch) views.


  1. Portable – Yes
  2. GPS – No
  3. Waterproof – IPX 7
  4. Colored display – Yes
  5. Frequency type – Sonar
  6. Screen size – 4 inch
  7. Resolution – 480 X 360
  8. Maximum depth – 500 ft


  1. Sonar auto-tuning.
  2. Wide-angle broadband sonar.
  3. The depth and shallow water alarm.
  4. Depth capability up to 500ft.


  1. Single beam sonar.
  2. No split view.

Garmin Striker Plus 5cv  GPS, ClearVu Scanning Sonar, Mapping Software

The striker plus 5cv consists of a transducer for built-in Garmin CHIRP traditional sonar plus CHIRP ClearVü scanning sonar. The fish finder’s built-in Garmin Quickdraw Contours mapping software allows you to create and store maps with 1’ contours for up to 2 million acres.

The built-in GPS lets you mark waypoints, view kayak’s or boat’s speed, and create routes. Frequencies supported with this fish finder is 50/77/200 kHz. It has a Bright, sunlight-readable 5” display and intuitive user interface with the resolution: 800 x 480 pixels. The Striker’s rugged design is great for every fishing environment. 


  1. Portable – Yes
  2. GPS – Yes
  3. Waterproof – IPX 7
  4. Colored display – Yes
  5. Frequency type – CHIRP
  6. Screen size – 5 inch
  7. Resolution – 800 X 480
  8. Maximum depth – 2000 ft


  1. IPX7 water resistance.
  2. Comes with everything you need to mount the transducer.
  3. High-quality screen.



  1. It does not have a Chart-plotting system.

Garmin Striker 4cv 

The Striker 4cv comes with a transducer for built-in Garmin CHIRP traditional sonar plus CHIRP ClearVü scanning sonar. It has a Built-in Garmin Quickdraw Contours mapping software that lets you make and store maps with 1’ contours for up to 2 million acres

The fish finder’s built-in GPS allows you to create routes, mark waypoints, and view the kayak’s speed. It has a 4.3” Bright display and intuitive user interface making it easy for you to read in sunlight. 

The Striker 4cv has the transit power of 300 (RMS). The tough-Rugged design of the fishfinder makes it great for every fishing adventure.


  1. Portable – Yes
  2. GPS – Yes
  3. Waterproof – IPX 7
  4. Colored display – Yes
  5. Frequency type – CHIRP
  6. Screen size – 4.3 inch
  7. Resolution – 272 X 480
  8. Maximum depth – 2300 ft


  1. High sensitivity GPS.
  2. CV20 T-M transducer.
  3. Up to 5,000 saved waypoints. 


  1. No microSD or NMEA connectivity. 
  2. No built-in maps.

Deeper PRO+ Smart Portable Sonar – Wireless Wi-Fi

The Deeper PRO+ is a Versatile, wireless, castable fish finder for avid fishermen, with an emphasis on kayak and ice fishing. 

This fish finder helps you to find fish and hot-spots faster, to see the fish location, their size and suspended depth as well as underwater vegetation, structure, hardness, and bottom contour and to know the water temperature and depth.

The Deeper PRO forms bathymetric maps when trolling from a kayak or while hole hopping when ice fishing. It casts up to 330ft and scans down to 260ft, It functions with dual-beam sonar frequency, a 55° wide beam (90kHz), and a 15° narrow beam (290kHz).


  1. Portable – Yes
  2. GPS – Yes
  3. Waterproof – Yes
  4. Colored display – 3 Color palettes
  5. Frequency type – Dual-beam sonar
  6. Screen size – N/A
  7. Resolution – N/A
  8. Maximum depth – 260 ft


  1. Very easy to use.
  2. Wi-Fi and GPS Enabled with Bathymetric mapping.
  3. Fits perfectly on almost every kayak.


  1. Lack of night fishing cover.

Deeper Chirp Smart Sonar

The Deeper CHIRP smart sonar has the same cost as the regular CHIRP sonar, but with this limited-edition bundle, you get the neck gaiter, a thermos, and night fishing cover for FREE. Offer available till stocks last.

The three-beam frequencies, extreme accuracy, and crisp clarity create it ideal for quickly locating target species holding spots, fishing in extreme depths, and pinpointing predator fish.

This fish finder casts out to 330ft with solid connectivity. It gives you accurate scanning in water from 6in to 330ft deep. Precise 0.4in target separation. This device is compatible with iOS and Android devices.

You can create bathymetric maps from the kayak and can access all your scans, maps, points of interest, notes, and photos on the lake book. It supports a fast-charging battery, 80% in 45 minutes, and 100% in just 75 minutes.


  1. Portable – Yes
  2. GPS – Yes
  3. Waterproof – Yes
  4. Colored display – N/A
  5. Frequency type – CHIRP
  6. Screen size – N/A
  7. Resolution – N/A
  8. Maximum depth – 330 ft


  1. Small and portable.
  2. Switchable beam angles.
  3. Multiple-use case.


  1. Low depth range.

Final Verdict 

Here we come to an end after having a long look at this buying guide. I really believe that now you got everything that you need for a selection process and you can make your own decision. However, I would like to add some recommendations to make things easier for you.

The best performer – The great performing fish finder is Humminbird 410940-1 HELIX 7

Editor’s Pick– My choice is Lowrance HOOK2 5.

Affordable – For the tight budget people, it will be LUCKY Portable or Humminbird 410150-1 PIRANHAMAX 4.

If you have some other requirements apart from the above-given suggestion then you can choose another model as these all reviewed models are the best in the market.