Garmin GPSMAP79S Hand Held GPS Review: Reliable or Risky?

Introduction

If you’re a boating enthusiast, commercial marine operator, or fishing professional, having reliable navigation equipment is non-negotiable. The Garmin GPSMAP79S Hand Held GPS With Sensors is a top-tier solution, designed specifically for aquatic adventures. Built for rugged conditions and loaded with advanced sensors, this unit is indispensable for both serious navigators and casual boaters alike.

Garmin, a globally recognized name in marine electronics, has once again delivered a game-changing product in the GPSMAP79S. It offers marine-grade durability, high-sensitivity tracking, advanced navigation features, and is built to float — a lifesaver in unexpected scenarios.

Overview / What Is Garmin GPSMAP79S Hand Held GPS With Sensors

The Garmin GPSMAP79S Hand Held GPS With Sensors is a waterproof, floating handheld GPS device tailored for marine applications. Whether navigating coastal waters, venturing into deep sea fishing, or participating in sailing regattas, this unit delivers superior performance in the harshest marine environments.

Equipped with a 3-axis compass, barometric altimeter, and GPS/GLONASS/Galileo support, the GPSMAP79S provides real-time positioning and elevation accuracy even under dense cover or cloudy skies. Its transflective 2.8″ color display remains readable under sunlight and its rugged design withstands corrosion from saltwater exposure.

Key Features of Garmin GPSMAP79S Hand Held GPS With Sensors

• 2.8″ color transflective display (sunlight-readable)
• Built-in 3-axis tilt-compensated compass
• Barometric altimeter for elevation and weather tracking
• High-sensitivity GPS, GLONASS, Galileo satellite reception
• Waterproof and floats on water (IPX7 rating)
• Internal memory with 8 GB for waypoint and map storage
• USB connectivity for updates and GPX file transfers
• Long battery life — up to 19 hours in GPS mode

Why Boaters Prefer Handheld GPS Units

While chartplotters and fixed-mount navigation systems offer extensive capabilities, handheld GPS devices like the Garmin GPSMAP79S Hand Held GPS With Sensors have unique advantages. They provide flexibility, backup navigation, and portability, making them ideal for smaller vessels, kayaks, or as a contingency device.

Many users love the ability to carry the GPS ashore for hiking, mapping remote island locations, or geocaching. It adds value far beyond the helm.

Garmin GPSMAP79S Hand Held GPS With Sensors Troubleshooting Tips

If you’re experiencing signal drops, inaccurate readings, or device lag, follow these quick troubleshooting tips:

1. Update Firmware: Connect the device to your PC and use Garmin Express for firmware updates.
2. Recalibrate Compass: Navigate to the compass settings and perform a recalibration after magnetic interference.
3. Check Battery Health: Replace or fully charge batteries before trips. Cold weather reduces performance.
4. Reset Device: Perform a soft reset by holding Power + Light buttons together for 10 seconds.

Still having trouble? Visit Yamaha Outboards or Garmin’s official support portal for extended resources.

Maintenance Tips

Proper care will significantly extend the life and performance of your Garmin GPSMAP79S Hand Held GPS With Sensors. Here’s how to keep it in peak condition:

• Rinse after use: Especially after saltwater exposure. Use fresh water and soft cloth to remove salt residue.
• Protect the screen: Use a screen protector to prevent scratches and maintain visibility.
• Battery care: Remove batteries when storing for extended periods. Recharge lithium-ion cells fully before long trips.
• Firmware checks: Update software regularly to access bug fixes and new features.

Routine cleaning and proper storage can prevent corrosion, screen fading, and internal hardware issues.

Garmin GPSMAP79S Hand Held GPS With Sensors Cost and Durability

Priced competitively in the high-performance GPS category, this model offers an excellent return on investment. It’s built to endure the rigors of marine use including salt spray, humidity, and accidental drops. The rugged polycarbonate case ensures long-term durability without adding bulk.

Compared to cheaper handhelds, the GPSMAP79S features superior sensor accuracy, better screen readability, and a robust build — making it a cost-effective choice for serious mariners.

Expert Advice and Pro Recommendations

Marine experts recommend the Garmin GPSMAP79S Hand Held GPS With Sensors as a secondary GPS unit or primary navigation tool on small craft. It’s also ideal for offshore fishing, tender navigation, or even land expeditions thanks to its terrain tracking and elevation sensors.

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Detailed FAQ Section

How to install Garmin GPSMAP79S Hand Held GPS With Sensors?

The GPSMAP79S doesn’t require installation like traditional marine units. Simply unpack, insert the batteries, and power on. You can configure units, calibrate sensors, and personalize map settings within the system menu. For software updates, connect the device to a PC using a micro-USB cable and download Garmin Express.

If you plan to mount it temporarily, optional brackets and tethers are available. Use it handheld while sailing, kayaking, or hiking — its portability is one of the standout features.

What are the best Garmin GPSMAP79S Hand Held GPS With Sensors options for professional boaters?

The GPSMAP79S stands out as the top Garmin handheld GPS for marine use due to its high-sensitivity sensors and marine durability. However, professional mariners often pair it with other Garmin devices like the GPSMAP86sci or GPSMAP66i for enhanced satellite messaging, AIS compatibility, or chartplotter sync via Garmin BlueChart.

The GPSMAP79S is also compatible with downloadable marine maps, custom GPX routes, and tide tables to enhance planning and real-time route monitoring.

What are the most common Garmin GPSMAP79S Hand Held GPS With Sensors maintenance tips?

Routine rinsing after saltwater use, screen care, and battery monitoring are key. Keep the battery compartment dry, use a microfiber cloth for cleaning, and store in a protective case when not in use. Avoid storing in extremely hot or cold environments.

Perform calibration checks every few weeks, especially before major trips, and always carry extra batteries or a charging solution for long journeys.

How to troubleshoot Garmin GPSMAP79S Hand Held GPS With Sensors issues?

If the device freezes or displays inaccurate data, begin by restarting it. Check satellite status and recalibrate sensors. Restore factory settings if performance does not improve. Use Garmin’s online forums and product manual to diagnose specific errors or refer to Garmin Express for firmware integrity.

In rare cases, hardware faults may require professional service, which can be handled under warranty by contacting Garmin’s support team.

What is the battery life and charging method of Garmin GPSMAP79S Hand Held GPS With Sensors?

The device uses two standard AA batteries and supports both alkaline and NiMH rechargeable types. In GPS mode, it runs up to 19 hours on fresh batteries. For extended trips, carry multiple sets or use USB-compatible NiMH batteries with a power bank or solar charger.

Battery status can be monitored on-screen, and it’s recommended to keep a backup pair ready for longer navigation or expeditions.

Conclusion

The Garmin GPSMAP79S Hand Held GPS With Sensors is an essential navigation tool for any mariner seeking durability, accuracy, and flexibility. With waterproofing, a barometric altimeter, and seamless satellite connectivity, it’s a complete solution in the palm of your hand.

Whether you’re cruising the coastline, navigating offshore, or just want peace of mind, this handheld GPS delivers. Backed by Garmin’s legacy of innovation, it’s a must-have marine gadget in 2025.

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