Navigating open water requires reliable equipment that can withstand harsh conditions while providing precise location data. Whether you are fishing in shallow bays or charting a course along the coast, having one of the Best Marine GPS Units is essential for safety and efficiency on the water.
Selecting the right navigation tool depends on your specific vessel type and how you plan to use the device. From integrated touchscreen chartplotters that sync with trolling motors to rugged handheld units designed for portability, we have analyzed the top options to help you make an informed decision for your next voyage.
You may also want to compare Best Marine GPS Navigation, Best Marine GPS Handheld, and Best Marine GPS for South Texas.
Best Marine GPS Units
Quick Comparison
| Product | Best For | Key Strength | Score |
|---|---|---|---|
| Garmin ECHOMAP UHD2 94sv Chartplotter | Best Overall | Bright 9-inch touchscreen optimized for sunlight readability. | 4.9 |
| Simrad GO9 XSE Chartplotter | Advanced Sonar Integration | All-in-one functionality combining GPS, sonar, and radar support. | 4.5 |
| Garmin Striker Vivid 7cv Fishfinder | High-Contrast Scanning Sonar | Vivid scanning sonar color palettes for improved visual distinction of underwater structure. | 4.8 |
| Garmin GPSMAP 79sc Handheld GPS | Floats for Easy Retrieval | Designed to float for easy recovery in water. | 4.7 |
| Garmin GPS 73 Handheld Navigator | Dedicated Sailing Features | SAILASSIST features like virtual starting lines and tack assist. | 4.7 |
How We Chose
- Display clarity and sunlight readability for high-glare marine environments.
- Sonar integration and transducer compatibility for depth and structure identification.
- Mapping software and preloaded chart coverage for regional navigation.
- Connectivity options including Wi-Fi and NMEA 2000 for system integration.
- Physical durability and specialized features like buoyancy or dedicated sailing modes.
1 Garmin ECHOMAP UHD2 94sv Chartplotter — Best Touchscreen Interface
Navigating coastal waters requires reliable, high-visibility data, and the Garmin ECHOMAP UHD2 94sv Chartplotter addresses this with a 9-inch sunlight-readable touchscreen. This display is engineered for improved clarity and wider viewing angles, ensuring that critical navigation details remain legible even in bright, direct light. The responsive interface allows for quick adjustments, which is essential when conditions change rapidly on the water.
Beyond its primary display, the unit includes the GT56-TM transducer, which supports Garmin traditional, ClearVü, and SideVü scanning sonars. This combination provides a comprehensive view of the environment beneath and to the sides of the vessel, assisting in identifying structure and fish with high detail. By utilizing multiple scanning frequencies, users can gain a clearer understanding of bottom composition and target separation.
The system is preloaded with Garmin Navionics+ coastal charts, which feature integrated Navionics data for detailed mapping. For users managing multiple devices, the built-in Wi-Fi connectivity enables the wireless sharing of sonar, waypoints, and routes between compatible ECHOMAP UHD2 units, streamlining data management across a vessel.
Integration extends to propulsion control, as the chartplotter connects wirelessly to the Force trolling motor. This functionality allows operators to create and follow routes, navigate directly to waypoints, adjust motor speed, and monitor battery life directly from the chartplotter interface, centralizing vessel control. This wireless link reduces cable clutter and simplifies the helm setup for a more efficient boating experience.
Best for: Boaters who prioritize a responsive touchscreen interface and seamless wireless integration with Garmin trolling motors and sonar systems.
Skip if: Users who require a larger display size or those who do not utilize Garmin-specific trolling motor and sonar ecosystems.
PROS
- Bright 9-inch touchscreen optimized for sunlight readability.
- Includes GT56-TM transducer for versatile scanning sonar options.
- Wireless connectivity for sharing data between compatible units.
- Direct Force trolling motor control for navigation and speed management.
CONS
- Fixed 9-inch display size may be insufficient for complex navigation needs requiring more screen real estate.
2 Simrad GO9 XSE Chartplotter — Advanced Sonar Integration
Navigating open water requires reliable data, and the Simrad GO9 XSE Chartplotter provides a comprehensive solution by integrating GPS navigation, sonar support, and radar capability into a single 9-inch display. Designed for sportboats, center-consoles, and smaller cruisers, this unit serves as a central hub for marine situational awareness.
The system includes the C-MAP DISCOVER card, which offers full-featured Vector Charts, custom depth shading, and high-resolution bathymetric contours for the US and Canada. This mapping data assists in identifying underwater terrain, while the included 83/200 kHz HDI transducer enables clear CHIRP sonar and DownScan Imaging to help pinpoint fish targets and bottom structure.
Connectivity is a primary focus of the Simrad GO9 XSE Chartplotter. It features built-in Wi-Fi and NMEA 2000 support, allowing for seamless integration with existing boat systems. Users can mirror the display to a smartphone or tablet, providing access to charts and radar data from anywhere on board.
With a 9-inch touchscreen interface, the device balances screen real estate with a compact footprint suitable for vessels where space is at a premium. The inclusion of both navigation and fish-finding tools in one package simplifies the helm setup for those who require versatile functionality without managing multiple standalone devices.
Best for: Boaters operating sportboats or center-consoles who need an integrated, compact system for navigation, sonar, and radar.
Skip if: Users who require a larger display size or specialized, dedicated sonar systems for deep-water professional fishing may find this 9-inch unit limiting.
PROS
- All-in-one functionality combining GPS, sonar, and radar support.
- Includes C-MAP DISCOVER charts for detailed bathymetric data.
- NMEA 2000 connectivity for seamless system integration.
- Supports smartphone and tablet mirroring via built-in Wi-Fi.
CONS
- 9-inch display may be too small for complex multi-window layouts.
- Requires specific transducer compatibility for advanced sonar features.
3 Garmin Striker Vivid 7cv Fishfinder — High-Contrast Scanning Sonar
Navigating open water requires precise location tracking and reliable sonar feedback to identify underwater structure. The Garmin Striker Vivid 7cv Fishfinder addresses these needs by integrating a high-sensitivity GPS with advanced scanning capabilities, allowing users to mark waypoints, create routes, and monitor boat speed with accuracy.
At the core of this unit is the GT20 transducer, which provides both Garmin CHIRP traditional sonar and CHIRP ClearVü scanning sonar. These technologies work together to deliver clear images of fish and underwater features. The device features new vivid scanning sonar color palettes, which help users distinguish between different types of structure and fish populations more effectively on the 7-inch color display.
For those who value connectivity, the Garmin Striker Vivid 7cv Fishfinder includes built-in Wi-Fi. This enables seamless integration with the ActiveCaptain app on a compatible smartphone, facilitating the transfer of waypoints, receipt of smart notifications, and access to the Garmin Quickdraw Community. Additionally, the unit comes with built-in Quickdraw Contours mapping, allowing users to create custom maps as they navigate.
The physical design prioritizes convenience for the operator, featuring a tilt/swivel bailmount bracket for flexible positioning on a boat console. This setup ensures that the display remains readable from various angles while underway, providing a practical solution for both casual anglers and those requiring consistent navigational data.
Best for: Anglers who need a reliable, easy-to-use fishfinder that combines high-contrast sonar imaging with essential GPS navigation and mapping capabilities.
Skip if: Users who require advanced chartplotter functionality with pre-loaded nautical charts or those needing integration with complex marine autopilot and radar systems.
PROS
- Vivid scanning sonar color palettes for improved visual distinction of underwater structure.
- High-sensitivity GPS for accurate waypoint marking and route creation.
- Wi-Fi connectivity for smartphone integration and software updates via ActiveCaptain.
- Built-in Quickdraw Contours mapping software for creating custom depth maps.
CONS
- Limited to fishfinder and basic GPS functions without advanced chartplotter capabilities.
- Requires smartphone connectivity to access the full range of community-based features.
4 Garmin GPSMAP 79sc Handheld GPS — Floats for Easy Retrieval
Navigating open water requires reliable positioning, and the Garmin GPSMAP 79sc Handheld GPS is engineered specifically for marine environments with a rugged, floating design that ensures the unit stays on the surface if accidentally dropped overboard. This feature provides peace of mind for boaters who need a durable, water-resistant navigation tool that can withstand the demands of coastal travel.
Equipped with preloaded BlueChart g3 coastal charts, this handheld device offers detailed mapping right out of the box. The high-resolution color display is protected by scratch-resistant, fogproof glass, maintaining visibility even in challenging weather conditions. Its physical construction is rated for water resistance, making it a practical choice for deck-side use.
The device excels in data management and precision, featuring increased memory capable of storing up to 10,000 waypoints, 250 routes, and 300 fit activities. To assist with orientation, it includes a built-in 3-axis tilt-compensated electronic compass that remains accurate even when the user is standing still, alongside a barometric altimeter for tracking pressure changes and altitude.
Reliability is further enhanced by support for multiple satellite constellations, including GPS, GLONASS, Beidou, Galileo, QZSS, and SBAS. This multi-system support facilitates consistent tracking across different global regions. With a battery life of up to 20 hours in GPS mode, the unit is suited for extended time on the water without frequent power interruptions.
Best for: Boaters and coastal navigators who require a durable, floating handheld GPS with preloaded marine charts.
Skip if: Users who prefer a large-screen fixed-mount chartplotter or those who do not require a handheld, battery-operated device.
PROS
- Designed to float for easy recovery in water.
- Preloaded BlueChart g3 coastal mapping.
- Multi-constellation support for reliable global tracking.
- High-capacity memory for extensive waypoint and route storage.
CONS
- Handheld form factor may be too small for primary navigation on large vessels.
- Battery-dependent operation requires spare power for long-duration trips.
5 Garmin GPS 73 Handheld Navigator — Dedicated Sailing Features
Navigating open water requires reliable positioning data, and the Garmin GPS 73 Handheld Navigator provides this through a specialized interface designed specifically for marine environments. Its dedicated backlit buttons allow for quick operation even when conditions are challenging, ensuring that essential navigation tasks remain accessible.
This device integrates SAILASSIST features, which include a virtual starting line, countdown timers, and tack assist to support competitive sailing. Beyond racing, it functions as a robust navigation tool with marine alarms for off-course alerts and anchor drag monitoring, alongside a Man Overboard (MOB) function for safety.
Data management is handled through internal storage capable of holding up to 1,000 waypoints and 100 tracks, allowing users to mark and return to specific locations. The unit is powered by 2 AA batteries, which provide an operational runtime of 18+ hours, ensuring it remains functional during extended time on the water.
The Garmin GPS 73 Handheld Navigator is built for portability, measuring 2.6 inches in width and weighing approximately 0.48 pounds. It comes equipped with a lanyard for secure handling, making it a practical choice for those who need a dedicated, portable marine navigation system.
Best for: Sailors and boaters who require a dedicated, portable navigation device with specific racing and safety features.
Skip if: Users who prefer a large-screen touchscreen interface or integrated chartplotter functionality will find this handheld unit too limited for complex navigation.
PROS
- SAILASSIST features like virtual starting lines and tack assist.
- Long battery life of 18+ hours using standard AA batteries.
- Dedicated marine alarms including anchor drag and MOB.
- Intuitive interface with backlit buttons for easy operation.
CONS
- Small display size compared to fixed-mount chartplotters.
- Battery-dependent operation requires carrying spares for long trips.
Best Marine GPS Units Buying Guide
Display Technology and Visibility
The screen is your primary interface, and in marine environments, sunlight readability is non-negotiable. Look for high-resolution displays that maintain contrast even in direct, harsh sunlight.
Touchscreen interfaces offer intuitive control for zooming and panning, while physical buttons provide reliable operation when your hands are wet or you are wearing gloves.
Sonar and Transducer Integration
For anglers, the quality of the sonar is just as important as the GPS accuracy. CHIRP traditional sonar and scanning sonar technologies allow you to see bottom structure and fish targets with high detail.
Ensure the included transducer matches your fishing style, whether you need standard depth readings or advanced side-scanning capabilities to cover more water.
Mapping and Charting
Preloaded charts save time and ensure you have base-level navigation data immediately upon installation. Check for compatibility with coastal charts or lake maps that provide bathymetric contours.
Some units allow for the creation of custom maps, which is particularly useful for anglers who want to record depth data in areas that are not well-charted.
System Connectivity
Modern marine electronics should not work in isolation. Wi-Fi connectivity allows you to sync with mobile apps for software updates and waypoint management.
If you have a larger boat, look for NMEA 2000 support, which enables the GPS unit to communicate with other onboard sensors, autopilots, and radar systems.
Portability and Durability
If you are using a handheld unit, buoyancy is a critical safety feature. A device that floats is much easier to retrieve if it accidentally goes overboard.
Rugged, water-resistant housings are standard, but check the specific IP rating to ensure the device can handle the level of moisture exposure expected in your environment.
Frequently Asked Questions
Do I need a chartplotter or a handheld GPS?
A chartplotter is best for permanent installation on a boat where you need a large screen and sonar integration. A handheld GPS is ideal for backup navigation, kayaking, or use on multiple smaller vessels.
What is the benefit of a touchscreen interface?
Touchscreens allow for faster menu navigation and easier map interaction, such as pinching to zoom or dragging to move across the chart.
Can I share waypoints between different GPS units?
Yes, many modern units with built-in Wi-Fi or NMEA 2000 connectivity allow you to wirelessly share waypoints, routes, and sonar data between compatible devices.
What does a transducer do?
A transducer sends and receives sonar pulses to map the bottom of the water and detect fish. It is essential for units that include fishfinder functionality.
Are preloaded maps enough for navigation?
Preloaded maps provide a great foundation, but you may want to purchase additional detailed chart cards if you travel to specific regions that require higher resolution or updated data.
Conclusion: Our Top Pick
Choosing the right navigation equipment is a balance between the features you need for your specific vessel and your budget. For those seeking a comprehensive solution for their boat, the Garmin ECHOMAP UHD2 94sv Chartplotter stands out as a versatile choice due to its high-quality touchscreen, included transducer, and seamless integration with trolling motors.
While the chartplotter offers the most advanced features for larger setups, consider your specific needs regarding screen size and portability. If you require a secondary navigation tool or a device for smaller craft, the handheld options listed above provide excellent reliability and specialized features that ensure you stay on course regardless of the conditions.