The 5 Best Lake GPS and Fish Finders(Updated 2023)

GPS have come along way over the years not only are they a valuable tool for fishing, but they also provide a extra level of safety when boating.

We have all seen the movie or read the story of the Titanic collision with an iceberg that was not visible on the sonar? Although that event in history happened in mid April of 1912, one thing will remain for sure – safety while on the lake boating is important. . Thankfully marine navigation technology has rapidly developed over the years, and electronic GPS devises can not only help you find more fish, but also prevent boating accidents.

So if you own a boat we hope our guide here of the  best marine GPS Chart plotters will help you pick the right unit for your boat. Also, we have taken our time to select and write our reviews on marine GPS chart plotters carefully and to give you all their benefits along with the possible drawbacks you may experience when choosing a GPS device for your boat.

We do our best to base the articles and reviews here at on our personal experience and scientific data we collect. We hope you find the answers you are looking for, we believe that if we provide you value, you will visit our website frequently and hopefully talk it up to your lake loving community.



This is the right place to acquaint yourself with some of the latest sailing navigation products on the market which we carefully handpicked for you. Our team has pointed out the essential features of the units as well as the possible drawbacks that you may experience with them in hopes that you will be able to easily identify the best GPS for your boat and situation.

1. Garmin Striker 4 GPS

The top feature of this chartplotter is definitely the so-called “Clear VÜ” scanning sonar. Garmin is a well respected name when it comes to GPS devices. Garmin ensures you will be able to track more objects around your boat. Not only that, the device is more thorough in tracking. The Striker 4 GPS features a 3.5-inch display that provides clear images.

The depth readings that this unit gives are also invaluable because you will know immediately when you enter the shallow water. Other metrics displayed by this

  • Temperature
  • Speed
  • Time of day

Another advantage of the Garmin Striker 4 GPS is the fact that it pretty much comes with everything needed for smooth operation. There is a transducer in the set together with a power cable. You may get a 12V battery so that you can use the product without a power outlet, so it can be used as a hand held lake gps.

On the downside, if you go outside of the USA, the map won’t be visible. However you can still use the GPS and fishfinder features even outside of the US if your need to.


  • The cord length is good – about 10 feet.
  • The unit can be easily disconnected from the mount and used as a hand held GPS
  • If you use a 7-amp 12V battery, the Garmin Striker 4 will work for over 12
  • hours. This is well above the average of 9 hours of others we have tested.
  • The chartplotter has a downscan and a transducer


  • No maps of other countries are included.
  • You have to go online to get the full owner’s manual

2. Humminbird Helix 5 Chirp GPS G3

This Humminbird Helix 5 Chirp GPS G3 unit is an entry level fish finder will all the essential features to inform you of everything surrounding your boat. This lake GPS unit features two main display modes – Max Mode and Clear Mode. You can decide how to best use this GPS devise base upon the situation. You can choose between having more precision on a narrower beam, or you can broaden the spectrum but will lose some detail.

A little knock on the product is that it doesn’t come with a screen cover, which is surprising. You will have to be extra careful with it. On the positive side you will be happy to find out that the chartplotter works with SD cards, and features a transducer’s cable which is about 20 feet long.

Getting information not only on the fish around you but also on the depth of the lake is important for GPS fishing devices. The Hummingbird Helix 5 will provide you information and fish & water depth even at speeds of 50 mph.



  • This model will give you decent images of the bottom of the lake.
  • The GPS function leaves “trails” on the map showing you where you have been.
  • You will receive the GPS with everything you need to operate it. There’s the unit, the bracket to mount it, a 6-foot power cord, and the transducer.



  • There is no side view scan feature on this model
  • Not so many languages are included in the settings. For example, there is no Arabic so if you are outside the continental USA, check first to see if your language is available before you order the Hummingbirds Helix 5 GPS.

3. Lowrance HOOK2 Fish Finder

This is the GPS unit with the largest screen, and may love this unit for this reason alone. The Lowrance HOOK2 comes with a choice between a 5-,7-, or a 9-inch display. The best part is that it also has US inland lake maps. We are talking about more than 4000 lake maps in this GPS.

Bear in mind that coastal maps aren’t included. If you want to add more maps, you will have to purchase a Micro SD card separately. So depending on your location and what lakes you plan on using your GPS this is something you need to be aware of. Even the the SD card for costal maps is quite reasonable and an easy add on.

When it comes to the GPS chartplotter’s features, you can add various waypoints, trails and also see the position of the boat on the chart page. If you wish to use the device on your kayak or any other boat that doesn’t have power, you can use a 12V battery.

Needless to say, the set includes a power cord and a transducer as well. The product can be installed on a 24-foot pontoon without any issues, although many people use it mainly for smaller boats. The most significant advantage according to us, is the presence of the sidefinder function with the Triple Shot moel. If you get the Split Shot one, the feature will not be there.


  • The unit supports a split-screen function.
  • It has a Micro SD card slot. You can add more maps to it.
  • Broader sonar coverage compared to previous models


  • The transducer in your trolling motor is not guaranteed to work with this sonar. You have to contact the manufacturer for confirmation.
  • There is no screen cover included but are sold separately.

4. Garmin Echomap Chirp UHD 93sv

This is an amazing, full features Findfinder, chartplotter and GPS. The Echomap’s massive advantage over other similar units is that it will present you with near-photographic images of your surroundings. This is a very popular GPS Unit for fishing and boating, and loved by most who use it, the swear by it. To get all that useful information, though, you need to make sure that at least 1/8 of the transducer is in the water. Know this, deeper is always better as long as your transom allows it. 

Staying on the transducer topic, it is not only included in the set but also comes with a long enough cord – 15 feet. The model of the transducer is the GT54 transducer for ultra High-Definition clearer and Ultra High-Definition SideVü scanning sonars and Garmin high wide CHIRP traditional sonar

You will be happy to find out that the device has preloaded LakeVü G3 inland maps with integrated Navionics data cover more than 17, 000 lakes with up to 1’ contours

 On the bright side, the screen isn’t small as it measures 9 inches and has touchscreen with touch assist.



  • Depth Finder is also among the available features.
  • Has the Clear VÜ technology for better imaging.
  • There is an SD card slot which will allow you to add more maps and customize as you choose.
  • The maximum depth is 800 feet, which is above the average of 600.



  • Need the space to mount it.

5. Humminbird Helix 7 Chirp MSI GPS G3 Fish Finder

This product is a “must have” for all the keen fishers and those that like the latest technology to help find fish. It includes MSI, which is the Mega Side Imaging. This is the latest in technology allows the user to see beneath the water like never before with up to 125 feet of side views. This is a perfect unit for using on the lake.

The GPS has a 7inch HD TFT screen to show exactly what is beneath your water craft. It includes the Low Q CHIRP transducer which is a proprietary and proven unit.

The Helix 7 comes with various options, including Navigation and map options.


  • Intuitive keypad controls
  • Dual spectrum CHIRP and MEGA imaging
  • Great side scan capability


  • Several model options. so choice carefully
  • Decent maps are extra

Other Popular Lake GPS Units that offer GOOD VALUE, but did not make our TOP 5 List

Garmin GPSMAP 78sc Handheld GPS

This is a portable and floating GPS and Chart Plotter. This unit will help you navigate safely. A great feature is the ability to mark and record great fishing spots for future reference.

This doesn’t include a transducer so you can’t see what is happening in the water below. Not everyone needs a fish finder and some like the old school approach to fishing.

Simrad NSS EVO3 Chartplotter/Fishfinder

Do you have some cash to burn and want a very fancy fish finder? It is worth checking out the Simrad NSS Evo3. It money is not an issue, you should seriously consider this full featured fish fisher.

Lake Navigation GPS – Are They That Good?

After reading our reviews, you are definitely aware that boat GPS navigation systems are considered a must by many boat-owners and virtually all fisherman. They offer so many features, they come in so many sizes and models. The lake gps unit you choose really comes down to your personal situation and how you plan to benefit from having a lake navigation GPS system on board.

We felt you may find it helpful if we sorted out all the advantages and disadvantages of using a marine Chartplotter for your vessel – to remind you that all types have the same general application in the open seas. Moreover, with guiding electronic devices in the sea you will be faced with identical challenges, so we hope this helps you in your decision on which lake navigation system will work, best for you. Let me say, if you are in doubt, just go with the Garmin EchoMAP Chirp.


  • You can quickly and easily find and store your favorite waypoints.
  • Get detailed maps of any water surface in the world, including lakes, rivers, and channels, and install them in your device via an SD card.
  • Connect your chart plotter to your phone to get the advantage of more high-tech features.
  • Can plot the shortest and safest course based on your vessel’s specifications.
  • Fish Finder features to aid your fishing activities.
  • It can show relevant information on the screen like water temperature, air temperature, speed, and depth.
  • May come with radars, transducers, and sonar to help you with the fishing.
  • Ability to show a side view and down imaging.
  • Designed to be water-resistant, durable and light.


  • Some models do not come with SD slot cards.
  • All detailed maps, except for the basic in-built one, should be purchased.
  • There are limited mounting options, especially if your boat’s dashboard is curved. Also, the quality of the material may not come to your expectations.
  • Sometimes your preferred language is not listed in the language menu settings.
  • If you are using a network Chartplotter, there might be a time lag between what your device is showing you and what you actually see in front of your boat.

Lake Navigation GPS Unit The Types and What
You Really Need To Know

Marine GPS Chartplotter Reviews

Unless you are a compass navigation pro, then you definitely need a Chartplotter to help you navigate in the open sea and on large lakes. But what about GPS devices make them so useful and helpful? Well, imagine you have only a GPS system in your boat – you will see the coordinates of the place you want to go, but they will be shown in numbers. s

And if you have skipped Geography classes like I did, the latitude and longitude coordinates will not be familiar to you at all. So, here comes the pivotal role of the Chartplotter. This unit is an excellent combination of a GPS system and an optical device through which you can actually see where you are positioned on the map shown on the chart plotter’s screen.

You can no longer be lost in numbers or coordinates because they are going to be accurately plotted on your device so that you can easily read them and go boating with confidence.

However, chartplotters come in different types, and this is perhaps what will make you feel confused when considering investing in one. For this reason, our team has compiled a list with the basic models that you may come across on the market as well as their main features and characteristics. And remember that the more advanced the technology is, the bigger the investment will be, such is the case for sailing electronics.

1. Handheld Chartplotters

This type of device for marine navigation has the option to be placed anywhere, and as their name states, you can hold them in your hand. They come with internal GPS and are small in size which makes them very compact to use while sailing or doing most any water sports. Handheld Chartplotter has all the essential functions which will be enough for you to determine your position on the map and mark your waypoints. In addition, these units are equipped with integrated maps although not that detailed as some wish for.

Still, all handheld chart plotters’ manufacturers offer a wide variety of lake or sea maps to be downloaded or can be bought separately as an add-on to your unit. And one more thing – since the screen of such products is small, you need to pick a handheld Chartplotter with very bright colors and screen protection from direct sunlight.

2. GPS Marine Chartplotters

The second type is also basically like the handhelds, but the difference is that its screen is bigger than the handheld GPS units. Some try, but in general you will not find it very comfortable to hold it or mount it on your kayak, so such guiding navigation is more suitable for bigger boats and not intended for water sports. However, GPS Marine sailing electronics may come with so many features such as additional maps, options to save waypoints and routes, a barometric altimeter and a built-in compass. In short, this is all you need for a weekend of boating.

3. GPS Chartplotter With Built-in Fish Finder

Now, this is what every fisherman would like to have in their boats and one of the reason they have gained so much popularity over the years. If you want to take your family out on the lake fishing, what is the number one goal? Of course, catch fish, and this is what these type of lake navigation devices are designed to help you do.

This type of device has the same characteristics as the basic GPS Chartplotter, but there is a built-in fish finder. You will definitely like this extra since it sends sound waves into the subsurface and then turns the signal into a picture to be shown on the screen of your chart plotter. This way you will easily find the perfect fishing spot without wasting your time, boat fuel, and families patience.

Another thing is that you can upgrade such steering navigation with a sounder when you buy an additional antenna for the weather or radar. Also, some models come with a transducer, but if this is not the case with your chosen model, you can always purchase such separately.

4. Network Chartplotters

As the name suggests, this is a high-tech navigation device designed to provide you with the most accurate information of the sea bottom as well as give you full control of your boat. Usually, network chart plotters have built-in internet connectivity so that you can use your marina’s Wi-Fi or tether it to your smartphone. This way you will get not only an accurate picture of your target location for your route, but importantly, be alerted of possible dangers under the water & floating debris. The operation systems of network chart plotters are exclusively user-friendly and very advanced, so you will really like all the extras it has to offer like controlling your boat motors, water temperature feature, free Cloud services and even listening to music.

5. Network Chartplotters With Built-in Fish Finder

These types of marine navigation systems are again aimed to support fishermen, but since it is cutting-edge technology, you will undoubtedly enjoy the 2-dimensional image of the sea bottom on the screen. This way, your fishing trips will become even more productive & enjoyable.

What To Look For When Shopping for Lake GPS Unit

In this section, we are going to list some of the features that may come with your Chartplotter or be purchased separately to boost your navigation device’s performance. We have included some basic information on each one’s purpose and functions as well. This way, you will no longer hesitate what the most useful features for you and your boating activities is.

1. Transducer

Some marine chart plotters are sold with a transducer while others are not. But in either situation, you need to know why a transducer is so important and what type you need.

Transducers actually serve as an antenna for your boat sonar’s system. The electrical signal that comes from the sonar is turned into a high-frequency sound which is then sent into the water’s subsurface and when it reaches the bottom or any other object like rocks, for example, the signal returns. At this very moment, the transducer receives the incoming signal and turns into a frequency that can be read by the sonar. And this is how you get the image of what is under your boat are displayed on the screen.

The transducers that come with chart plotters will be efficient because you will not waste your time and money in searching for any additional devices. Also, this tool for converting electrical signals will help you when you go fishing & provide more safety when boating in unknown waters.

2. Chirp Sonar

This feature is excellent for giving you an accurate image of the sea bottom in terms of depth and resolution. And thanks to the fact that this type of sonar transmits and receives signals in more than one frequency, you can quickly distinguish between big fish from small schools of fish, for instance.

Also, if your marine Chartplotter is equipped with Chirp sonar, then the chances of you receiving misleading information from the sea bottom are minimal. The reason for this is the ability of the sonar to tell the difference between true sonar echo and common disturbances.

In addition, there are different frequency ranges for the Chirp sonar that can be exceptionally functional depending on where you do your boating. This is crucial when you want to cast your anchor successfully. So, do not miss out on our best boat anchors thorough guide along with our top picks to help you choose the right device for mooring your vessel.


· Low Chirp Frequency

Here the signal is transmitted at 25-80 kHz or 50 kHz, which means that such signal will be excellent for sailing in really deep waters – more than 196 feet.

· Medium CHIRP Frequency

When the frequency is between 80-160 kHz or 83 kHz, then you can easily find great fishing spots in shallow waters.

· High CHIRP Frequency

At high frequency like 160-800 kHz or 200 kHz, you will definitely get the highest resolution. Moreover, if your vessel is sailing fast, the high chirp frequency will be able to show you whether there is fish or other objects under the water. Also, such a frequency range is most suitable for water depths of up to 196 feet.

3. Maps

No matter whether you are boating in the ocean or fishing in a lake, it is just smart to know your exact whereabouts. This is why maps are of great importance, and all chart plotters come with preloaded ones. Today you can easily find maps for most all lakes in the United States, Canada and most parts of the world.

So, when picking a marine Chartplotter, make sure to get all the details about the preloaded maps and all the charts that do not come in the package.

4. Lake GPS Mounting Hardware

Although not a feature of the chart plotters’ electronic characteristics, positioning your device the right and safe way is vital. We advise you to check your boat’s dashboard and think how to mount the Chartplotter since some vessels ‘panels with controls are not conventional.

Also, make sure to research the material of the mounting bracket. If plastic is mainly used, then you will have to buy a new product for securing your Chartplotter as this material is not durable at all.

5. Screen Brightness Display

When choosing your perfect device for marine navigation, do not forget to check whether there is protection against direct sunlight. It is also essential to pick a product with extremely bright color options to get a clear view of the images on your sailing electronic device regardless of the weather conditions.

Marine Chartplotter Installation Tips

Installing your device is a pretty straight forward simple project. They are basically installed the same way. This video will give you a good general understanding.

Here we will give you a step-by-step guide to installing a basic model navigating device.

  1. Choose the place where you will mount the Chartplotter and make sure it will fit. Sometimes this is a challenge, especially when you have to consider the protection of the device as well as the viewing angles.
  2. After deciding on the most appropriate place, drill the 4 holes for the mounting studs. You should make a hole in each corner to match the device’s chassis.
  3. Run the cables for the chart plotter before you actually position it.
  4. Then you have to reach in behind to fix the thumb nuts to secure the unit.
  5. Place the helm panel and after that turn on the device for testing.
  6. Insert the chart data card (if you have such), and your Chartplotter is ready to navigate.

Finally, do not forget to read the manufacturer’s installation guide for more specific details on your marine steering device.

Maintaining Your Lake Fishfinder

All devices needs proper care, and the same goes for lake fishfinders. And given the fact that you may use this device in any kind of weather conditions and in a variety of situations, you need to know how to keep it safe. So, here are some important tips about maintaining your fishfinder.

1. Screen

Taking care of the visible parts is a must. And the screen is the most important here. Make sure that:

  • You clean it with a soft cloth or we have found that a PC screen cleaner works best.
  • Make certain the back of the chart plotter is sealed against the pod; otherwise, the device will not be water-resistant.
  • You do not use abrasive or solvent-based cleaners on the device.

2. Software Updates

Updating your marine navigating device is essential because it can give you the latest information about the weather, currents, tides and many more. Make sure to call a technician or contact the manufacturer if any problems occur when the image is blurred on the screen, for example. Most software updates are accomplished quickly and easily much like cell phone updates.

3. Replacing instruments

Sometimes you will need to make some changes to your Chartplotter device either due to upgrades or any troubleshooting features. In these situations, it is crucial to take into consideration the following tips.

  • In case your display has been cracked, or your transducer is not working, and you have to replace them, remember to contact the same device’s manufacturers replacement parts. If you cannot find a replacement for your Chartplotter model because your navigation system type is no longer in stores, then you still have some options. A properly maintained device can provide you service for years.

If the part that you need is a stand-alone instrument and it is not connected to any network, then it is going to be easy fix.

If the part is networked with others, then you will have to check whether your device is equipped with a standard NMEA output. (most today are). Remember that your new instrument must use the same protocol to make it work but make sure you get some extra cables, just in case. Also, a data combiner will be a great idea since some NMEA protocols have a limit to the number of instruments available.

Marine Chartplotter Safety Tips

Buying and installing your electronic navigation system is just the beginning of your boating adventure. But if you are not aware of the possible dangers or do not know how to work with your Chartplotter, then any voyage could turn into a nightmare. This is the reason why we have prepared some essential safety tips to ensure boating pleasure.

  • Navigation systems are essential, but they are made to assist you, so do not rely only on your Chartplotter. You really need to have some basic navigation knowledge and know your boat. Much like a GPS in your car. When my daughter first started to learn how to drive, I did not allow here to use a phone app to tell her every turn she needed to make to get to her grand moms house. I wanted her to first develop a sense of basic navigation. I think this is a critical thinking skill that we should all try to develop. Some of you will remember vacations and the days of paper maps bought at the gas station. 🙂
  • If you are going to use a map that is on an SD card, make sure that the map is up-to-date. This way you will have the latest information about all the possible dangers that you may encounter.
  • It is vital to study and understand all the symbols that you will see on your device’s screen. They can very slightly from device to device, but a few minutes of concentrated study is really all you will need.
  • When plotting your course remember to check what is standing between you and your destination because your Chartplotter will show you the shortest way but not the hazards you may come across on your journey.
  • Make sure you plan your route carefully and understand where exactly you are going. You can get an excellent helper when looking at what is in front of your vessel in the far distance if you have binoculars which should be part of your boating carry on tools. So, do not forget to invest in a good pair of marine binoculars 

Best Marine GPS Chartplotters Comparison Chart

Wrap Up

This is the end of our guide but surely the beginning of your safe boating adventures. We hope this helped you decided which device makes the most sense for your and your personal boating situation.


Garmin Striker 4

Garmin Striker Best GPS for the Lake

$ 3.9x 6.9 x 1.8″ 8.1 pounds 1,600 feet freshwater, 750 feet saltwater 3.5″

Hummingbird Helix 5 Chirp GPS

Humminbird Helix Best GPS for the Lake

$$ 15.75 x 4.75 x 9.63″ 3.26 pounds 1200 feet (3,000ft with optional 50kHz) 5″

Lowrance HOOK2 Fish Finder

Lowrance Hook2 Best GPS for the Lake

$$$ 10.1 x 8.4 x 7.75″ 8.4 pounds 200+ feet 5 , 7,  9″

Garmin Echomap Chirp

Garmin Echomap Best GPS for the Lake

$$$ 11.4 x 6.5 x 2.4″ 2.3 pounds 800 ft for salt – up to 1000 ft for freshwater 9″

Humminbird GPS G2 Fish Finder

Humminbird Helix 7 G2 MSI Best GPS for the Lake

$$ 10.54 x 5.8 x 3.68 (mount size) 3.6 Pounds 1200ft (3,500 with optional 50 kHz) 7″

Garmin GPSMAP 78sc Handheld GPS

Portable GPS Best GPS for the Lake

$$ 1.7 x 2.65 x 7″ 9.6 ounces N/A 3″
Simrad NSS Evo3

High End Fish Finder Best GPS for the Lake
$$$$$ 18 x 10 x 6″ 8.4 pounds   9″

If this guide helped you with your choice, don’t forget to share it with your lake friends or online. Thanks for reading and as always – enjoy every day!6.9