Choosing a marine GPS system is less about picking a brand name than deciding how the plotter will fit the boat. Garmin and Raymarine both sell chartplotters that can display position, routes, charts, and connected sensor data, but the right choice depends on the rest of the electronics, the kind of boating, and the features included in the specific model.
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Garmin ECHOMAP UHD2 94sv Chartplotter with GT56 Transducer
- ✔ Display: 9-inch touchscreen
- ✔ Transducer: GT56-TM
- ✔ Sonar: Traditional, ClearVü, and SideVü
Simrad GO9 Chartplotter and Fish Finder with HDI Transducer and C-MAP Discover Charts
- ✔ Display: GO9 multifunction display
- ✔ Included chart card: C-MAP Discover
- ✔ Chart coverage: US and Canada
Garmin GPSMAP 79sc Marine Handheld GPS with BlueChart g3 Coastal Charts
- ✔ Water resistance: IPX6 (unit level only)
- ✔ Display: 6 inches; 240 x 400 resolution
- ✔ Storage: 8 GB
Garmin is a strong starting point for boaters who want an accessible chartplotter with charting and sonar options across a broad range of setups. Raymarine deserves a close look when a boat already uses its displays, autopilot, radar, or other compatible equipment. Neither brand wins every comparison: model capabilities, chart regions, and network support vary. The main tradeoff is between choosing a capable unit as a relatively direct navigation purchase and choosing one for how it works within a larger onboard system.
At a Glance
| Criteria | Garmin chartplotters | Raymarine chartplotters | Winner |
|---|---|---|---|
| Ease of choosing and using | Broad lineup; interface and features depend on model | Broad lineup; interface and features depend on model | Depends |
| Charts and navigation | Chart support varies by model, region, and chart package | Chart support varies by model, region, and chart package | Depends |
| Sonar and fishing | Many models offer sonar versions or support compatible sonar equipment | Sonar capability depends on model and compatible transducers | Depends |
| System integration | Connects with compatible Garmin marine electronics and networks | A natural fit with compatible Raymarine displays, autopilots, radar, and sensors | B |
| Range of installation needs | Options span basic navigation to larger, networked installations | Options range from compact displays to integrated systems | Tie |
| Value and upgrade cost | Strong value when the selected model includes the features the boat needs | Higher system cost can make sense when it avoids replacing or duplicating compatible equipment | Depends |
Garmin ECHOMAP UHD2 94sv Chartplotter with GT56 Transducer
The ECHOMAP UHD2 94sv is our best overall choice for boaters who want a fixed navigation screen that also gives them several ways to read underwater terrain. Its built-in Garmin Navionics+ coastal charts put charting in the core package, and the GT56-TM transducer covers traditional sonar, ClearVü, and SideVü. That range makes it more versatile for finding fish and understanding structure than the Simrad GO9’s listed CHIRP and DownScan capabilities.Its sunlight-readable 9-inch touchscreen is a practical fit for helm use, where a compact handheld screen can be harder to consult at a glance. Wi-Fi adds the ability to share sonar data, waypoints, and routes with another ECHOMAP UHD2 chartplotter, and Force trolling motor compatibility may make it a better fit for anglers building around that equipment. Compared with the Simrad, the Garmin’s supplied details emphasize sonar breadth and chartplotter-to-chartplotter sharing; the Simrad instead highlights NMEA 2000 and radar support.This is the strongest all-purpose fixed display in the group, though the available product details do not specify a limitation list or expand on chart coverage areas. We should confirm that its chart package and installation fit our waters and vessel before choosing it. Buyers wanting a portable GPS they can move easily should look to the GPSMAP 79sc, while those seeking C-MAP and a radar-support path may prefer the GO9.
Pros:
- Built-in Garmin Navionics+ coastal charts
- GT56-TM transducer supports traditional, ClearVü, and SideVü sonar
- Sunlight-readable 9-inch touchscreen
- Wi-Fi supports sharing sonar data, waypoints, and routes with another ECHOMAP UHD2
Cons:
- Designed as a fixed chartplotter rather than a portable backup GPS
- The supplied details do not specify the coastal chart coverage area
- Wireless route and sonar sharing is described for another ECHOMAP UHD2 chartplotter
Best for: Boaters who want a fixed coastal chartplotter with multiple sonar views, a supplied transducer, and wireless sharing with another ECHOMAP UHD2.
Not ideal for: Buyers who need a pocketable or floating handheld, or who specifically want the C-MAP chart package and NMEA 2000 features called out for the Simrad.
Bottom line: We recommend the ECHOMAP UHD2 94sv when we want the broadest combination of included coastal charting and sonar capability in a fixed display.
“We recommend the ECHOMAP UHD2 94sv when we want the broadest combination of included coastal charting and sonar capability in a fixed display.”
Simrad GO9 Chartplotter and Fish Finder with HDI Transducer and C-MAP Discover Charts
The Simrad GO9 makes sense for boaters who want navigation, fish-finding, and a route toward broader onboard electronics in one multifunction display. It includes C-MAP Discover charts with stated coverage in the US and Canada, plus an HDI transducer for CHIRP sonar and DownScan Imaging. Compared with the Garmin ECHOMAP UHD2 94sv, its listed sonar does not include SideVü, but its combination of Wi-Fi and NMEA 2000 gives it a distinct role for integrating a display with a boat’s network.The GO9 also supports radar, an appealing consideration for owners planning an electronics system that may expand over time. That wording matters: radar support does not mean radar hardware is included, and buyers should check what additional options their intended setup requires. Display mirroring to a smartphone or tablet offers another way to view information, while the Garmin’s wireless sharing description specifically covers data exchange with another ECHOMAP UHD2 chartplotter.For a sportboat, center console, or smaller cruiser, this is a capable middle ground between navigation and fish-finding. Its stated design focus on smaller boats makes it less suitable for buyers outfitting a larger vessel, and its included chart coverage should be checked against our regular cruising area. We would choose the GO9 over the handheld when we need a mounted multifunction screen; we would choose the GPSMAP 79sc when carrying a floating backup matters more than sonar or network integration.
Pros:
- Includes C-MAP Discover charts covering the US and Canada
- HDI transducer supports CHIRP sonar and DownScan Imaging
- Wi-Fi mirroring can display the unit on a phone or tablet
- NMEA 2000 and radar support allow a connected electronics setup
Cons:
- Radar capability is support; additional radar options may be required
- Designed for smaller boats and may not suit larger vessels
- Its listed sonar features do not include SideVü, which the Garmin ECHOMAP includes
Best for: Owners of sportboats, center consoles, and smaller cruisers who want C-MAP charts, CHIRP and DownScan sonar, and NMEA 2000 connectivity.
Not ideal for: Owners of larger vessels or buyers who expect radar hardware to be included with the display.
Bottom line: We would choose the GO9 for a smaller boat where C-MAP charting and network-ready multifunction features matter more than the Garmin’s broader listed sonar views.
“We would choose the GO9 for a smaller boat where C-MAP charting and network-ready multifunction features matter more than the Garmin’s broader listed sonar views.”
Garmin GPSMAP 79sc Marine Handheld GPS with BlueChart g3 Coastal Charts
The GPSMAP 79sc is the clear choice when portability is the priority. This floating handheld comes with preloaded BlueChart g3 coastal charts and supports GPS, GLONASS, BeiDou, Galileo, QZSS, and SBAS satellite systems. Its rugged, fogproof design and tilt-compensated electronic compass make it a useful tool to keep aboard as a backup or carry between vessels. Neither fixed chartplotter in this roundup offers that same portable role.There are meaningful navigation advantages in its storage: we can save up to 10,000 waypoints and 250 routes, making it practical for keeping a large set of locations and planned trips on hand. A barometric altimeter and compass add orientation information, while the 6-inch color display is smaller and lower in resolution than what we would typically want as the sole helm interface. It has no listed sonar transducer or Wi-Fi, so it cannot match the ECHOMAP’s fishing views or the GO9’s described network features.We should also account for power and water protection. Battery life is stated as up to 20 hours in GPS mode, which means longer outings call for a plan to conserve or replenish power. The IPX6 water resistance applies to the unit level only, so the rating should not be assumed to cover every accessory or connection. Choose this Garmin as a portable navigator or backup; skip it as a substitute for a fixed chartplotter if we need a larger helm display and integrated sonar.
Pros:
- Floating handheld design with fogproof, scratch-resistant glass
- Preloaded BlueChart g3 coastal charts and support for multiple satellite systems
- Stores up to 10,000 waypoints and 250 routes
- Includes a tilt-compensated electronic compass and barometric altimeter
Cons:
- IPX6 water resistance is specified for the unit level only
- Battery life is up to 20 hours in GPS mode
- Smaller 6-inch display and no listed sonar transducer or Wi-Fi
Best for: Boaters who want a floating, rugged handheld with preloaded coastal charts as a portable navigator or secondary GPS.
Not ideal for: Anglers seeking built-in sonar, or boaters who need a large fixed display with onboard electronics integration.
Bottom line: We recommend the GPSMAP 79sc as a capable portable or backup marine GPS, rather than as a direct replacement for either fixed chartplotter.
“We recommend the GPSMAP 79sc as a capable portable or backup marine GPS, rather than as a direct replacement for either fixed chartplotter.”
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Key Differences
The most consequential difference is often the electronics already aboard. A chartplotter that can share data with the boat’s existing radar, autopilot, sonar, or instruments may save installation work and give the helm a more coherent view. Raymarine has a clear fit advantage for owners already using compatible Raymarine equipment. Garmin can be the simpler decision when the boat is being equipped from scratch or the buyer wants to select a Garmin centered setup. In either case, check the exact model and network compatibility before buying; brand alone does not guarantee that every device will connect.
Navigation and fishing capabilities are model and package questions, not dependable brand-wide rankings. Chart coverage, included maps, update options, sonar channels, transducer support, screen size, and connectors can differ between units in the same family. Compare the precise configurations against the waters you travel and the tasks you perform. A premium display may bring little value to a coastal cruiser who needs position, routes, and readable charts, while an angler or offshore skipper may benefit from investing in sonar, radar, and network functions.
That distinction also determines value. The lower purchase price is not automatically the lower installed cost: a unit that requires new sensors, adapters, or duplicate equipment may cost more once fitted. Paying more for a chartplotter is justified when its larger screen, specified capabilities, or compatibility solve a real need. For a simple navigation setup, prioritize clear chart presentation and the right coverage rather than features that will go unused.
Detailed Comparison
Ease of choosing and using (moderate difference)
Winner: Depends. Both brands offer entry-level and advanced units, so the exact display and software matter more than the logo. Garmin may suit buyers who want to build a straightforward setup around one plotter; Raymarine may feel more natural to someone already familiar with its equipment. This is a moderate difference at most: handle the specific interface if possible and confirm that the model exposes the functions needed at the helm.
Winner: Depends. Neither brand is the universal chart winner. Available chart regions, detail, bundled coverage, and update terms vary by product and destination. The gap is major only when one unit has better suited coverage for the waters the buyer actually uses or when one chart package meaningfully reduces additional expense. Compare coverage and update costs for the chosen models before deciding.
Sonar and fishing (major difference)
Winner: Depends. Some models are sold with sonar capability or can connect to compatible transducers, while others focus on charting and networking. Fishing performance therefore depends on the specific sonar hardware, transducer, and display features. This can be a major difference for anglers and a minor one for boaters who only need navigation. Match the full equipment list to the fishing method and depth range.
System integration (Raymarine chartplotters wins — major)
Winner: B, for existing Raymarine installations. Raymarine has the practical advantage when the boat already relies on compatible Raymarine displays, autopilot, radar, or instruments: keeping equipment within a known ecosystem can simplify data sharing and upgrades. The gap is major when replacing components in a working network, but minor or absent on a new, standalone installation. Garmin is a sensible choice when the boat is already organized around compatible Garmin devices. Verify specific models, connections, and software support.
Range of installation needs (minor difference)
Winner: Tie. Both brands sell products for different boat sizes and levels of onboard complexity. A small display can serve basic navigation; more involved installations may need larger screens, sensors, radar, or multiple displays. This is a minor brand distinction. The useful comparison is between the unit’s screen size, mounting options, environmental rating, power requirements, and network connections and the boat’s available space and wiring.
Value and upgrade cost (moderate difference)
Winner: Depends. Garmin may offer better value when a suitable unit provides the necessary charting and sonar features without extra purchases. Raymarine can be better value when its compatibility lets an owner retain working equipment instead of replacing it or buying duplicate sensors. The gap is moderate and depends on the total installed cost, including charts, transducer, mounts, cabling, and any required adapters.
Garmin chartplotters: Pros and Cons
Pros:
- Broad selection across simpler and more elaborate navigation setups
- Can be a direct fit for a Garmin-centered installation
- Models and bundles may combine chartplotting and sonar needs
Cons:
- Features and chart coverage vary substantially between models
- May add cost or installation work when replacing equipment built around another ecosystem
- A lower-priced unit may omit sonar or networking features assumed by the buyer
Raymarine chartplotters: Pros and Cons
Pros:
- Strong practical fit for boats with compatible Raymarine equipment
- Can support upgrades that retain existing displays, sensors, or control equipment
- Offers options for both basic navigation and connected systems
Cons:
- Compatibility must be checked across the specific devices in the installation
- A full system purchase can be costly if the boat lacks compatible equipment
- Charting and sonar capabilities depend on the selected model and package
Who Should Choose What
Choose Garmin chartplotters if:
- You are building a navigation setup around compatible Garmin electronics
- You want to compare self-contained chartplotter and sonar packages for fishing or cruising
- The Garmin model you have selected offers the chart coverage and connections your boat requires at a better total cost
Choose Raymarine chartplotters if:
- Your boat already has compatible Raymarine displays, autopilot, radar, or instruments
- You want to upgrade a Raymarine based system while retaining equipment that still works
- The model’s network support matches the sensors and displays planned for your installation
Skip both if: Skip both until you have confirmed the chart coverage, transducer support, power needs, mounting space, and network compatibility for the exact units under consideration; a mismatch with the boat’s equipment can outweigh brand preferences.
Value for Money
Paying more is worthwhile when the added capability will be used or when it avoids a more expensive refit. For a Raymarine owner, a compatible upgrade may preserve working sensors and control equipment, making the higher display price reasonable. For a new installation, compare Garmin and Raymarine packages by their total cost, not the screen alone: include charts, transducer, cabling, adapters, and installation. If the boat needs only reliable chartplotting, extra sonar and networking features are poor value unless there is a defined use for them.
Final Verdict
Choose Garmin for a new or Garmin centered setup when its specific model covers the waters you use and supplies the navigation or sonar functions you need at a competitive installed cost. Choose Raymarine when the boat already has compatible Raymarine electronics and system continuity matters; in that situation, integration can be worth more than a lower standalone display price. The biggest deciding factor is the equipment already aboard, followed by chart coverage and the exact model’s sonar and networking support. For a simple, standalone purchase, compare the shortlisted units feature by feature and buy the one that meets the requirement without paying for unused capability.
Frequently Asked Questions
Is Garmin or Raymarine better for a marine GPS chartplotter?
Neither is best for every boat. Garmin is a strong choice for a standalone or Garmin centered setup; Raymarine often makes more sense when compatible Raymarine electronics are already installed. Compare exact models, chart coverage, and connections.
Can a Garmin chartplotter work with Raymarine equipment?
Some equipment from different brands may share data through supported marine network standards, but compatibility is model specific and functions may not all carry across. Check the manuals and connection requirements for each device before planning the installation.
Do marine GPS systems include charts?
Some units include chart coverage, while others require a separate chart card or subscription. Confirm the included region, level of detail, and update terms against your intended waters before purchasing.
Is a more expensive marine chartplotter worth it?
It is worth paying more if you need its screen size, sonar, networking, or compatibility with existing equipment. For basic navigation, a less expensive model with suitable charts and readable display may be the better value.
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