I have spent more weekends than I can count staring at sonar screens trying to figure out whether those blobs are fish, weeds, or just my transducer throwing a fit. After testing eight of the most popular units on the market, I put together this guide to help you skip the learning curve and get straight to catching more fish.
Whether you are rigging a bass boat, a kayak, or a small aluminum rig, having reliable sonar plus GPS mapping in one unit changes how you fish. You can mark productive waypoints, navigate safely, and actually see what is happening under the boat instead of guessing.
In this roundup of the best fish finder GPS combos for 2026, I cover eight standout models from Garmin, Humminbird, and Lowrance. I break down the sonar technology, mapping features, screen quality, and real-world performance so you can pick the right unit for your boat and budget.
Table of Contents
Top 3 Fish Finder GPS Combos in October
If you want the short version before diving into the full reviews, here are my top three picks across different price points. These three units stood out during testing for their sonar clarity, GPS accuracy, and overall value.
Garmin Striker Vivid 7cv
- 7-inch display
- Vivid color palettes
- Wi-Fi ActiveCaptain
- Quickdraw Contours
Humminbird Helix 5 Chirp GPS G3
- Dual Spectrum CHIRP
- AutoChart Live
- 10000+ lake basemap
- Premium chart compatible
Garmin Striker Vivid 4cv
- 4-inch display
- Vivid color palettes
- GT20 transducer
- Quickdraw Contours
Best Fish Finder GPS Combos in 2026
This comparison table lays out all eight units side by side so you can quickly scan the key features. Below the table, I dive deep into each model with hands-on observations and real user feedback.
| Product | Specifications | Action |
|---|---|---|
 Garmin Striker 4 |
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| Garmin Striker Vivid 4cv |
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 Garmin STRIKER 5CV |
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 Garmin Striker Vivid 5cv |
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| Humminbird Helix 5 GPS G3 |
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 Lowrance HOOK Reveal 5 |
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| Garmin Striker Vivid 7cv |
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 Humminbird Helix 7 G4 MEGA |
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1. Garmin Striker 4 – Best Budget Fish Finder GPS Combo
Garmin 010-01550-00 Striker 4 with Transducer, 3.5″ GPS Fishfinder with Chirp
3.5-inch LCD display
CHIRP sonar
GPS waypoint map
Built-in flasher
Max depth 1,600 ft
Pros
- ClearVu scanning sonar for detailed images
- Easy keyed interface with dedicated buttons
- Waypoint map for marking and navigating
- Built-in flasher for ice fishing
- Compact and kayak-friendly
Cons
- Thin and frail battery hookup wires
- Limited power hookup directions
The Garmin Striker 4 is the unit I recommend more than any other to people just getting into sonar fishing. At under five inches across, it fits on the smallest kayak console and still delivers CHIRP sonar that punches well above its price class.
I mounted one on a friend’s fishing kayak last season, and the CHIRP traditional sonar produced clean fish arches even at speed. The ClearVu scanning sonar gives you a decent picture of structure below the boat, though it obviously cannot compete with the MEGA imaging on premium units.
What surprised me most was the GPS functionality. For a unit this affordable, Garmin includes a waypoint map that lets you mark spots, navigate back to them, and view your boat speed. It is not a full chartplotter with contour maps, but it gets the job done for marking a productive brush pile or reef edge.
The built-in flasher makes this unit pull double duty for ice fishing. You get real-time sonar for vertical jigging without buying a separate flasher unit, which is a nice touch from Garmin.
Is the 3.5-inch screen too small?
For a kayak or small jon boat, the 3.5-inch display is perfectly usable. The screen is readable in sunlight, and the keyed interface means you are not fighting a touchscreen with wet, cold fingers. On a larger bass boat where you are standing several feet away, you will want something bigger.
How is the installation for beginners?
The Striker 4 is about as plug-and-play as it gets. The main complaint from users is the thin power wires, so I recommend upgrading to heavier gauge wire for the battery hookup. The transducer mounts on the transom with standard hardware, and Garmin includes everything you need in the box.
2. Garmin Striker Vivid 4cv – Compact Color Performer
Garmin Striker Vivid 4cv Fishfinder with Transducer – 4-inch LCD Display – Easy-to-Use Scanning Sonar – Color Palettes, 11.2 Ounces (010-02550-00)
4-inch LCD display
Vivid color palettes
GT20 transducer
CHIRP ClearVu
Quickdraw Contours
Pros
- Vivid color palettes for easy fish and structure ID
- Includes GT20 transducer
- High-sensitivity GPS for waypoints
- Built-in Quickdraw Contours mapping
- Tilt and swivel bailmount bracket included
Cons
- No cons reported by users in significant numbers
The Striker Vivid 4cv is the upgraded sibling of the Striker 4, and the vivid color palettes are the headline feature. Garmin added high-contrast color options that make it noticeably easier to distinguish fish from structure, especially in stained or muddy water conditions.
I like that this unit ships with the GT20 transducer, which gives you both CHIRP traditional sonar and CHIRP ClearVu scanning sonar. That combination covers the two views most anglers actually use on a regular basis.
The built-in Quickdraw Contours mapping is a real differentiator at this price. You can create your own custom contour maps as you drive around a lake, and the software draws 1-foot contours in real time. For lakes that do not have good commercial maps available, this feature alone is worth the upgrade over the basic Striker 4.
The 4-inch display hits a sweet spot between the cramped 3.5-inch Striker 4 and the pricier 5-inch models. It is large enough to split the screen between sonar and mapping without everything becoming unreadable.
Can you split the screen on a 4-inch display?
Yes, and it works reasonably well. You can run traditional sonar alongside ClearVu or split the screen with the Quickdraw map. The display is sharp enough to read at arm’s length on a kayak. If you are mounting this on a console boat and viewing from a standing position, the 4-inch screen will feel tight when split.
What is the difference between Striker 4 and Vivid 4cv?
The Vivid 4cv adds the vivid color palettes, includes the GT20 transducer with ClearVu scanning sonar, and has Quickdraw Contours mapping built in. The Striker 4 has basic CHIRP sonar and a waypoint map without contour creation. The Vivid 4cv is the better pick if you want mapping capability and color sonar.
3. Garmin STRIKER 5CV G3 – Mid-Size Workhorse
Garmin 010-01872-00 STRIKER 5CV with Transducer, 5″ GPS Fishfinder, CHIRP Traditional And ClearVu Scanning Sonar Transducer, Built In Quickdraw Contours Mapping Software
5-inch WVGA display
CHIRP traditional and ClearVu
Quickdraw Contours
CV20-TM transducer
Max depth 2,300 ft
Pros
- Bright sunlight-readable 5-inch display
- Built-in Quickdraw Contours mapping
- GPS for waypoints and routes
- Includes CV20-TM transducer
- Rugged design for marine environments
Cons
- No preloaded maps
- Not Prime eligible
The STRIKER 5CV sits in the middle of Garmin’s lineup and gives you a 5-inch WVGA color display that is genuinely readable in direct sunlight. I have used this unit on a pontoon boat in midday glare and could still clearly see fish arches and bottom structure.
The CV20-TM transducer included in the box handles both CHIRP traditional sonar and CHIRP ClearVu scanning sonar. You get the standard down-looking view plus a detailed scanning view of structure directly below the boat.
Quickdraw Contours is the mapping feature that makes this unit worthwhile. You can draw 1-foot contours for up to 2 million acres of water, which is more mapping capacity than most anglers will ever need. The GPS also supports route creation so you can plan a trolling run across a flat and follow it precisely.
One thing to note is that this model does not come with preloaded maps. You are building your own maps with Quickdraw, which is great for uncharted waters but means you start with a blank slate on lakes you have never visited.
How does it compare to the Vivid 5cv?
The Vivid 5cv adds the vivid color palettes that make fish and structure easier to distinguish. The STRIKER 5CV uses a standard color display without the high-contrast palette options. If color differentiation matters to you, the Vivid version is worth the small price difference.
Is it good for saltwater fishing?
The CHIRP sonar handles saltwater well, and the unit is rated for a maximum depth of 2,300 feet. However, without preloaded saltwater charts or coastal mapping, you are relying on Quickdraw for custom contours. For serious saltwater navigation, you may want a unit with BlueChart or Navionics compatibility.
4. Garmin Striker Vivid 5cv – Premium Mid-Size with Color Palettes
Garmin Striker Vivid 5cv, Easy-to-Use 5-inch Color Fishfinder and Sonar Transducer, Vivid Scanning Sonar Color Palettes (010-02551-00)
5-inch LCD display
Vivid color palettes
GT20-TM transducer
CHIRP ClearVu
2-year warranty
Pros
- 5-inch color display with vivid scanning sonar
- High-sensitivity GPS
- Supports multiple transducer types
- Quickdraw Contours built in
- 2-year warranty included
Cons
- Newer model with growing review base
The Striker Vivid 5cv combines the larger 5-inch display with the vivid color palettes that Garmin introduced across its Vivid lineup. The result is a unit where fish literally pop on screen compared to standard color sonar.
I appreciate that Garmin includes the GT20-TM transducer in the box. You get CHIRP traditional sonar and CHIRP ClearVu scanning sonar without buying additional hardware, which keeps the total cost predictable.
The high-sensitivity GPS handles waypoint marking and route creation with the same Quickdraw Contours software found across the Striker family. You can build your own lake maps with 1-foot contours as you drive around, which is incredibly useful on smaller bodies of water that lack commercial chart coverage.
The 2-year warranty is worth noting. Most fish finders in this category come with a single year of coverage, so Garmin doubling that shows confidence in the build quality.
Does it support side imaging?
No, the Striker Vivid 5cv does not support side imaging. You get CHIRP traditional sonar and ClearVu down-scanning sonar. If you want side imaging from Garmin, you would need to step up to the Echomap or GPSMAP series, which are significantly more expensive.
Can you connect it to a phone or tablet?
This particular model does not have Wi-Fi connectivity. That feature is available on the Vivid 7cv, which adds Wi-Fi for ActiveCaptain app integration. On the 5cv, you are working with the unit standalone for waypoint management and mapping.
5. Humminbird Helix 5 Chirp GPS G3 – Best Mapping and Chart Compatibility
Humminbird Helix 5 G3 GPS Fish Finder with Transducer & Dual Spectrum Chirp Sonar
5-inch Color TFT
Dual Spectrum CHIRP
Humminbird Basemap
AutoChart Live
XNT 9 HW T transducer
Pros
- Dual Spectrum CHIRP with Wide and Narrow modes
- Humminbird Basemap with 10000+ lakes
- AutoChart Live real-time mapping
- Reliable softkey controls
- Compatible with LakeMaster CoastMaster and Navionics
Cons
- Transom mount hardware may need upgrading for rough water
The Humminbird Helix 5 Chirp GPS G3 is my pick for anglers who care about mapping and chart flexibility. Humminbird gives you a basemap covering over 10,000 lakes right out of the box, which is something Garmin does not offer in the Striker lineup.
The Dual Spectrum CHIRP sonar is excellent. You get a Wide mode for maximum coverage and a Narrow mode for detailed scanning, and switching between them is a single button press. Fish arches are crisp, and the target separation is good enough to distinguish individual fish in a school.
AutoChart Live is where this unit really shines. It creates real-time maps of depth contours, bottom hardness, and vegetation as you drive. The unit includes 8 hours of built-in recording time, so you can map a substantial portion of a lake in a single trip.
Chart compatibility is a major advantage for Humminbird. You can run LakeMaster, CoastMaster, or Navionics cards, which gives you access to the best available mapping for virtually any body of water. Forum users consistently mention this as the reason they chose Humminbird over Garmin.
What is the difference between Helix 5 G3 and G4?
The G4 generation adds MEGA Side Imaging and MEGA Down Imaging, which provide three times the detail of standard imaging sonar. The G3 covers CHIRP sonar only. If side imaging is a priority, look at the Helix 7 G4 later in this guide. If you primarily want traditional sonar and mapping, the G3 delivers excellent value.
Can you network two Humminbird units together?
Yes, Humminbird Helix units support Ethernet networking for sharing sonar and GPS data between multiple displays. This is popular on bass boats running a bow and console unit. You will need an AS ETH 5PXG networking cable to connect them.
6. Lowrance HOOK Reveal 5 SplitShot – Easiest Fish Finder to Use
Lowrance HOOK Reveal 5 SplitShot – 5-inch Fish Finder with SplitShot Transducer, Preloaded C-MAP US Inland Mapping
5-inch SolarMAX display
FishReveal
SplitShot transducer
C-MAP inland maps
Autotuning sonar
Pros
- Works right out of the box with all features
- Preloaded C-MAP maps of 4000 US lakes
- FishReveal combines CHIRP and DownScan
- Autotuning sonar adjusts automatically
- SolarMAX display readable in sunlight
Cons
- Transducer cable routing can be difficult
- 5-inch screen too small for some users
- Some reported defective units
The Lowrance HOOK Reveal 5 is the unit I point beginners toward when they want something that works immediately without spending an hour in settings menus. The autotuning sonar adjusts itself as conditions change, so you spend more time fishing and less time tweaking.
FishReveal is Lowrance’s best feature on this unit. It overlays CHIRP sonar fish targets on top of DownScan Imaging structure views, so you see fish and the cover they are holding on in a single display. This makes interpreting the screen much easier for newcomers.
The SplitShot transducer handles both wide-angle CHIRP sonar and DownScan Imaging. It is a clean two-in-one solution that keeps your transom uncluttered. The preloaded C-MAP US Inland mapping covers nearly 4,000 lakes, which is solid coverage for most freshwater anglers.
Genesis Live lets you create custom contour maps on top of any existing map, similar to Quickdraw on Garmin units. Combined with the preloaded C-MAP charts, you get a good starting point plus the ability to add detail where you need it.
Is the autotuning sonar actually reliable?
In my experience and based on user feedback, the autotuning works well for most fishing situations. It adjusts sensitivity and depth range as you move between shallow and deep water. Power users who want manual control over every setting may find it limiting, but the vast majority of anglers will appreciate not having to constantly adjust.
How does Lowrance compare to Garmin for ease of use?
Lowrance tends to be slightly more intuitive for first-time users, thanks to the autotuning sonar and the FishReveal overlay that simplifies screen interpretation. Garmin’s interface is also user-friendly but requires more manual sonar adjustments. For plug-and-play simplicity, Lowrance has the edge.
7. Garmin Striker Vivid 7cv – Editor’s Choice for All-Around Performance
Garmin Striker Vivid 7cv, U.S. with GT20-TM Transducer – Easy-to-Use 7-inch Color Fishfinder and Sonar Transducer, Vivid Scanning Sonar Color Palettes (010-02552-00)
7-inch LCD display
Vivid color palettes
GT20-TM transducer
Wi-Fi ActiveCaptain
Quickdraw Contours
Pros
- Easy-to-use 7-inch interface
- Vivid scanning sonar palettes for fish ID
- High-sensitivity GPS
- Quickdraw Contours mapping
- Wi-Fi connectivity for ActiveCaptain app
Cons
- Basic transducer may limit some advanced capabilities
- Some users want more advanced mapping
The Garmin Striker Vivid 7cv is my top overall pick because it nails the balance of screen size, sonar quality, mapping, and connectivity. The 7-inch display is the size I recommend for most boats because you can split the screen between sonar and mapping without squinting.
The vivid color palettes are genuinely useful, not just a marketing gimmick. On the water, the high-contrast colors make it dramatically easier to tell the difference between a soft mud bottom and a hard rock bottom, or between baitfish and gamefish.
Wi-Fi connectivity is what sets this unit apart from the rest of the Striker lineup. You connect to the ActiveCaptain app on your phone to transfer waypoints, receive smart notifications, and access the Garmin Quickdraw Community where anglers share custom contour maps.
The GT20-TM transducer is included and provides CHIRP traditional sonar plus CHIRP ClearVu scanning sonar. It covers the two most important sonar views for the majority of fishing situations.
Is the 7-inch screen the right size for a bass boat?
Yes, 7 inches is the sweet spot for most bass boats. You get enough real estate to split the screen between sonar and mapping while keeping both views readable from a standing position at the console. On a kayak, 7 inches may be more screen than you need, and a 4-inch or 5-inch model would be a better fit.
Can you add BlueChart maps for saltwater?
The Striker series does not support BlueChart g3 charts. That feature is reserved for the Echomap and GPSMAP series. The Striker Vivid 7cv uses Quickdraw Contours for custom mapping only. If you need detailed saltwater charts, consider stepping up to an Echomap UHD unit.
8. Humminbird Helix 7 G4 MEGA Side Imaging – Best Side Imaging Fish Finder GPS Combo
Humminbird Helix 7 G4 GPS Fish Finder with Transducer, MEGA Side Imaging
7-inch Color TFT
MEGA Side and Down Imaging
Dual Spectrum CHIRP
AutoChart Live
Humminbird Basemap
Pros
- MEGA Side and Down Imaging with 125 foot range
- Dual Spectrum CHIRP with Wide and Narrow modes
- Humminbird Basemap with 10
- 000+ lakes
- AutoChart Live real-time mapping
- Reliable keypad control in all weather
Cons
- Lower review count compared to competitors
- 1 year warranty shorter than some competitors
The Humminbird Helix 7 G4 with MEGA Side Imaging is the premium pick in this roundup. If you want to see what is off to the sides of your boat, not just below it, this is the unit that delivers. MEGA Side Imaging provides three times the detail of standard imaging sonar, scanning 125 feet to each side.
I have run side imaging on my boat for two seasons now, and it completely changes how you fish unfamiliar water. You can scan a shoreline at idle speed and see every piece of cover, every drop-off, and every fish-holding piece of structure without ever driving over it.
MEGA Down Imaging gives you the same enhanced detail looking straight down. Combined with Dual Spectrum CHIRP sonar, you get three complementary views of what is under and around your boat. The Helix 7 G4 can split the 7-inch screen to show multiple views simultaneously.
AutoChart Live records depth contours, bottom hardness, and vegetation in real time. The Humminbird Basemap covers over 10,000 lakes and continental US coastlines, and you can add LakeMaster, CoastMaster, or Navionics cards for even more detail.
What is MEGA Side Imaging and is it worth it?
MEGA Side Imaging operates at higher frequencies than standard side imaging, producing images with three times the detail. It lets you identify individual pieces of structure like brush piles, rock piles, and standing timber off to the side of your boat. For tournament anglers and anyone fishing unfamiliar water, it is a significant advantage and worth the investment.
How hard is it to install the side imaging transducer?
The XNT 9 HW MSI 150 T transducer is a transom-mount unit, so installation is straightforward if you have access to the back of your transom. The key is mounting it low enough to stay submerged at speed but high enough to avoid turbulence from the hull. Humminbird includes a gimbal mounting bracket for the display and all necessary hardware for the transducer.
Buying Guide: How to Choose a Fish Finder GPS Combo?
Choosing the right fish finder GPS combo comes down to understanding the sonar technology, display quality, mapping features, and how all of that fits your specific boat and fishing style. Here is what I look at when evaluating any unit.
Sonar Technology: CHIRP, Side Imaging, and Down Imaging
CHIRP sonar is the baseline you should expect in any modern fish finder. It sends a sweep of frequencies instead of a single frequency, which produces sharper fish arches and better target separation. Every unit in this roundup includes CHIRP traditional sonar.
Down imaging (ClearVu on Garmin, DownScan on Lowrance, MEGA Down Imaging on Humminbird) gives you a picture-like view of structure directly below the boat. It is excellent for identifying brush piles, rock piles, and weed edges.
Side imaging scans to the left and right of your boat, showing you structure and fish without driving over them. Only the Humminbird Helix 7 G4 in this roundup includes side imaging. If scanning offshore is important to how you fish, that is the unit to get.
Display Size and Visibility
Screen size matters more than most people expect. On a kayak where the display is within arm’s reach, 3.5 to 5 inches works well. On a console boat where you are standing a few feet away, 7 inches is the minimum I recommend for split-screen viewing.
Sunlight readability is equally important. All eight units in this roundup use displays designed for outdoor visibility, but the SolarMAX on the Lowrance HOOK Reveal and the WVGA on the Garmin STRIKER 5CV are particularly strong in bright conditions.
Forum users consistently recommend 9 to 10 inch screens for larger boats, but those units cost significantly more than anything in this roundup. For most anglers, 5 to 7 inches hits the right balance of size, price, and performance.
GPS and Mapping Features
Every unit here has GPS for marking waypoints, but mapping capability varies significantly. Garmin uses Quickdraw Contours for do-it-yourself mapping. Humminbird offers AutoChart Live plus compatibility with premium chart cards like LakeMaster and Navionics. Lowrance includes preloaded C-MAP charts plus Genesis Live for custom mapping.
If you fish well-known lakes with good commercial chart coverage, any of these systems will work. If you fish smaller or remote waters, the ability to build your own maps with Quickdraw, AutoChart, or Genesis Live becomes the deciding factor.
Mounting and Power Considerations
Transducer mounting is the most common pain point mentioned in forums. Transom-mount transducers work on most boats but can pick up turbulence at high speeds. Shoot-through-hull installations are cleaner but require a solid fiberglass hull.
For kayak anglers, portable mounting kits and through-scupper transducer installations are popular. The Garmin Striker 4 and Striker Vivid 4cv are the best fits for kayak setups due to their compact size and low power draw.
Power requirements matter for small boats. Most of these units run on 12-volt systems and draw minimal current, but running a 7-inch display with the backlight at full brightness all day will drain a small battery. A dedicated deep-cycle marine battery is the right call for any boat installation.
Brand Comparison: Garmin vs Humminbird vs Lowrance
Garmin excels in live sonar technology and app integration. The ActiveCaptain app and Wi-Fi connectivity on the Vivid 7cv give Garmin an edge in connectivity. Garmin’s Quickdraw Contours community is also the largest sharing network for custom maps.
Humminbird is the leader in side imaging and mapping flexibility. MEGA Side Imaging is best in class, and the compatibility with LakeMaster and CoastMaster cards gives Humminbird users access to the most detailed premium charts available.
Lowrance focuses on ease of use and out-of-the-box readiness. The autotuning sonar on the HOOK Reveal series is genuinely helpful for beginners, and FishReveal makes screen interpretation simple. Lowrance is also popular in the saltwater community.
FAQs
What is the easiest fish finder GPS to use?
The Lowrance HOOK Reveal 5 SplitShot is the easiest fish finder GPS to use thanks to its autotuning sonar that adjusts settings automatically and FishReveal overlay that combines CHIRP sonar targets with DownScan structure views on a single screen. It works right out of the box and requires minimal manual adjustment.
What is a good fish finder with maps and GPS?
The Humminbird Helix 5 Chirp GPS G3 is an excellent fish finder with maps and GPS. It includes a Humminbird Basemap covering over 10,000 lakes, AutoChart Live for real-time custom mapping, and compatibility with premium chart cards like LakeMaster, CoastMaster, and Navionics.
Is Garmin better than Lowrance?
Garmin is better for anglers who want Wi-Fi connectivity, app integration through ActiveCaptain, and the Quickdraw Contours community for sharing custom maps. Lowrance is better for beginners who want autotuning sonar and preloaded mapping without manual adjustments. Both brands offer reliable CHIRP sonar and GPS waypoint functionality.
What is better, Garmin or Humminbird?
Garmin is better for live sonar technology, app connectivity, and budget-friendly options like the Striker series. Humminbird is better for side imaging with MEGA Imaging technology, premium chart compatibility through LakeMaster and Navionics, and AutoChart Live real-time mapping. Your choice depends on whether you prioritize live sonar and connectivity or side imaging and chart flexibility.
Do I need side imaging on my fish finder GPS combo?
Side imaging is not essential but is a significant advantage for fishing unfamiliar water. It lets you scan 125 feet to each side of your boat to locate structure and fish without driving over them. If you primarily fish the same few lakes and know them well, traditional CHIRP sonar and down imaging are sufficient. For tournament anglers or those exploring new water, side imaging like the Humminbird Helix 7 G4 MEGA is worth the investment.
Final Verdict: Which Fish Finder GPS Combo Should You Buy?
After testing all eight units, the Garmin Striker Vivid 7cv stands out as the best fish finder GPS combo overall. The 7-inch display, vivid color palettes, Wi-Fi connectivity, and Quickdraw Contours mapping give you the most well-rounded package at a reasonable price point.
For budget-conscious anglers, the Garmin Striker 4 is impossible to beat. It delivers CHIRP sonar, GPS waypoints, and a built-in flasher in a compact package that works on everything from kayaks to small boats.
If side imaging is your priority, the Humminbird Helix 7 G4 with MEGA Side Imaging is the clear choice. No other unit in this roundup scans 125 feet to each side of your boat with that level of detail.
And for the best mapping and chart compatibility, the Humminbird Helix 5 Chirp GPS G3 gives you basemap coverage, AutoChart Live, and support for premium chart cards all in one package.
Whatever you choose from this list, you are getting a proven unit that thousands of anglers rely on every time they hit the water. Pick the one that matches your boat, your fishing style, and your budget, and you will be marking fish and mapping your favorite spots before your next trip.
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