Best Marine GPS and Chartplotters for Sailboats

How to Choose Your Marine GPS and Chartplotter

A marine GPS is the most important navigation instrument on board. Whether it’s a fixed chartplotter or a portable GPS, this equipment determines your position, plots your route, and alerts you to hazards. The choice depends on your type of sailing, your budget, and the level of integration you want with the rest of your electronics.

Fixed chartplotter vs portable GPS: A fixed chartplotter (Garmin, Raymarine, B&G) offers a large screen, a connection to the NMEA 2000 network, and a stable power supply. It remains the benchmark tool for serious navigation. A portable GPS (Garmin GPSMAP 67, etc.) serves as a backup or a tool for day trips — it works even during a total electrical failure.

⚓ Expert Tip: Register your EPIRB and PLB with your national maritime authority. An unregistered beacon slows rescue response significantly.

Selection Criteria

Screen size: 5-7 inches for a cruising sailboat (readability in the cockpit), 9-12 inches for a boat with a full instrument panel. Under 5 inches, the readability of chart details is limited.

Included charts: Check the geographic coverage. Navionics and C-MAP dominate the market. Annual updates are often paid (50-150 €/year) — factor in this recurring cost.

NMEA 2000 integration: A chartplotter connected to the network displays data from the autopilot, wind instrument, depth sounder, and AIS on a single screen. It’s a valuable comfort and safety feature.

Advanced features: Built-in AIS, compatible radar, Wi-Fi for display mirroring on a tablet, and a track recorder are features that truly prove their worth in coastal and offshore sailing.

Recommendations by Budget

Under 500 €: Garmin GPSMAP 67 (portable) or a used B&G Zeus2. A reliable solution for coastal sailing on a limited budget.

500-1,500 €: B&G Vulcan 7R or Garmin ECHOMAP UHD2. A color chartplotter with built-in depth sounder, detailed charts, and NMEA 2000 connectivity. The sweet spot for most coastal cruisers.

1,500-3,000 €: B&G Zeus4S or Raymarine Axiom+. 9-12 inch screen, fast processor, advanced features (AIS, radar, autopilot). For long-distance cruising and offshore sailing.

Frequently Asked Questions

Can a smartphone replace a marine GPS?

For coastal sailing in fair weather, apps like Navionics or i-Boating are excellent. But a smartphone lacks battery life, isn’t waterproof (with rare exceptions), and loses signal without a mobile network. For serious navigation, a dedicated GPS remains essential. A smartphone is a complement, not a replacement.

Do I need a subscription for marine charts?

Most chartplotters include a basic chart. Detailed charts (Navionics+, C-MAP) are sold separately or as an annual subscription (50-200 €/year). OpenCPN with free charts (official ENC) offers a free alternative for tight budgets.

What is the lifespan of a chartplotter?

5-10 years under normal use. The most common failures involve the screen (UV damage) and connectors (corrosion). A chartplotter installed away from sun and salt easily lasts 8-10 years. Software updates typically stop after 5-7 years.

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Why a Marine GPS Chartplotter is Essential

A reliable marine GPS chartplotter is the heart of modern sailboat navigation. It shows your position on electronic charts, tracks your route, displays depth, and integrates with autopilot, wind instruments, AIS, and radar. Whether you’re day-sailing or crossing oceans, a good chartplotter provides situational awareness and safety that paper charts alone cannot match.

Key Features for Sailors

Sailing-Specific Functions

Look for units with laylines, tide overlays, weather routing, and sail race features. B&G chartplotters are purpose-built for sailing, with SailSteer and Racing features that power and fishing units lack.

Screen Size and Sunlight Readability

For a typical 30-45 foot sailboat, a 9-inch display hits the sweet spot between visibility and space. Look for IPS displays with high brightness for cockpit use in direct sunlight.

Integration Capabilities

Modern chartplotters connect via NMEA 2000 and NMEA 0183 to wind instruments, depth sounders, autopilots, and AIS transceivers. Choose a unit that integrates smoothly with your existing electronics.

Chart Options

Navionics+, C-MAP, and Garmin BlueChart offer different coverage and features. Some chartplotters include charts; others require separate purchase.

Top Marine GPS Chartplotters for Sailboats

Best for Sailing: B&G Zeus3S 9

The B&G Zeus3S 9 is the gold standard for sailboat navigation. Built specifically for sailing, it features SailSteer, sailing timelines, weather routing, and seamless integration with B&G instruments and autopilots. The 9-inch screen is bright, fast, and easy to read in any conditions.

Best All-Rounder: Garmin GPSMAP 8610xsv

The Garmin GPSMAP 8610xsv combines a 10-inch keyed-assist touchscreen with excellent chart compatibility, sailing features, and Garmin’s legendary reliability. It integrates with Garmin autopilots, radar, and the quatix smartwatch.

Best Value: Simrad GO9 XSE

The Simrad GO9 XSE delivers a 9-inch touchscreen with C-MAP and Navionics support at a competitive price. It’s a solid choice for sailors who don’t need B&G’s racing features but want reliable navigation and integration.

Best Budget: Lowrance Hook2 7 GPS Plotter

For smaller sailboats or as a backup unit, the Lowrance Hook2 7 provides essential GPS navigation with a simple interface and a budget-friendly price. It lacks advanced sailing features but covers the basics well.

Best for Cockpit Space Savings: B&G Vulcan 7 FS

The B&G Vulcan 7 FS offers B&G’s sailing heritage in a compact 7-inch package with a front-sonar module for depth. Ideal for smaller sailboats or as a dedicated sailing display alongside a larger multi-function display.

Handheld and Backup Options

Garmin quatix 7 Marine Smartwatch

The Garmin quatix 7 puts boat data on your wrist, connects to your chartplotter, and provides a backup GPS with basic navigation. It’s a luxury but genuinely useful for racers and offshore sailors.

Choosing the Right Chartplotter

• Under 30 feet: 7-inch display (B&G Vulcan 7, Lowrance Hook2 7)
• 30-45 feet: 9-inch display (B&G Zeus3S 9, Simrad GO9, Garmin GPSMAP 8610)
• Over 45 feet: 12+ inch display or multiple networked displays
• Racing: B&G Zeus3S with SailSteer and racing features
• Cruising: Garmin GPSMAP or Simrad GO series

Installation Tips

• Mount the display where it’s visible from the helm and protected from spray
• Plan cable runs before cutting holes—NMEA 2000 backbone simplifies wiring
• Use a fused power connection with adequate wire gauge
• Consider a protective cover when not in use
• Update charts and firmware before departure

Conclusion

A quality marine GPS chartplotter transforms how you navigate, providing real-time position awareness, route planning, and integration with your boat’s systems. For sailors, B&G’s sailing-specific features make the Zeus3S series the top choice, while Garmin and Simrad offer excellent all-around options. Match your display size to your boat, invest in quality charts, and you’ll navigate with confidence whether you’re daysailing or crossing oceans.