Garmin Descent G1 Scuba Diving Computer Review: Marks Surface Entry and Exit Points

What the Descent G1 Is, and Who For

Garmin Descent G1 tracks up to 25 hours in dive mode for divers who need a reliable subsurface computer with a 4.6 rating from 266 buyers.

The Garmin Descent G1 provides 21 days of battery life in smartwatch mode, allowing you to keep it on your wrist between dives without constant charging. This longevity makes it a versatile tool for those who want a daily wearable that also functions as a subsurface computer. The device includes Pulse Ox, a sensor that measures oxygen saturation in the blood.

The Garmin Descent G1 was chosen for a full review because it has 266 buyer ratings, the 5th most of the 15 scuba diving computers we evaluated. This review is for a budget-first shopper comparing what each dollar buys.

Our comparison is based on a data-driven analysis of listing specifications and buyer ratings.

The Short Answer on the Descent G1

Best for: you need a dedicated scuba diving computer that provides 21 days of smartwatch use while maintaining a sapphire lens for scratch resistance.

The Descent G1 is a solid choice for this purpose at the $489.99 price point.

• Pro: Sapphire lens provides high durability against surface scratches.
• Pro: 21-day smartwatch battery life allows for extended periods between charges.
• Pro: 4.6 rating from 266 buyers indicates consistent user satisfaction.
• Con: 25-hour dive mode battery life limits the device to about 10 to 20 hours of snorkeling.
• Con: 1.27-inch screen size provides a smaller viewing area for data compared to larger smartwatches.

Don’t buy this if: you require a dive computer with a battery life exceeding 25 hours in dive mode.

Price assessment: The $489.99 price is fair for a device featuring a sapphire lens and multi-system GPS support.

The Numbers on the Spec Sheet

Battery Life measures the total duration of continuous power supply, and the Descent G1 provides up to 25 hours in dive mode.

Before You Buy: Scuba Diving Computer Checklist

The first thing to check is the dive mode battery life to ensure it covers your planned underwater time.

• ☐ Confirm the battery life provides at least 25 hours of power—failure to do so may result in the device powering off during a long excursion.
• ☐ Verify the 1.27 inch screen size fits your wrist—a screen that is too small can make reading depth and time data difficult to see quickly.
• ☐ Check that the 2.15 ounce weight is comfortable for your wrist—a weight that feels too heavy can cause arm fatigue during long dives.
• ☐ Ensure the 1.79 x 1.79 inch dimensions match your preferred watch style—incorrect sizing may result in a device that sits awkwardly on the arm.
• ☐ Budget for the $489.99 price point—ordering a model outside your budget may require a different choice of scuba diving computer.

You should not buy this product if you require a color display, as the Descent G1 uses a monochrome display.

The Descent G1 works with your phone to sync dive logs automatically via Bluetooth, Wi-Fi, and USB connectivity. You can manage your data through the Garmin Dive smartphone app, which allows for easier logging and management of the 200 dives the watch stores.

The Descent G1 supports a full day of snorkeling, providing up to 20 hours of power in the 25-hour dive mode. For example, a diver could remain in the water for a 12-hour snorkeling trip and still have a power buffer remaining.

Practical performance of this Scuba Diving Computer

Multi-satellite support provides reliable navigation for this underwater computer

The Descent G1 supports GPS, GLONASS, and Galileo, which allows you to navigate using multiple global satellite systems simultaneously. This multi-system support provides more positioning data points, helping you maintain a reliable location even in areas where a single satellite network might have limited coverage. You can use these systems to log surface entry and exit points, which helps you plan your next dive or track your movements across different environments.

Descent G1 provides this navigation capability alongside 30 built-in sports apps to track various activities outside of the water. Because the device includes surface entry and exit point marking, you can create a clear breadcrumb trail of your movements. You should verify that your specific environment has clear views of the sky, as satellite reception depends on a clear line of sight to the satellites above.

Comprehensive Fitness and Recovery Tracking

The Descent G1 provides 24/7 wrist-based HR (heart rate) monitoring and Pulse Ox, which measures blood oxygen saturation. You can view your heart rate and oxygen levels while underwater because these sensors are integrated into the watch-style dive computer. These metrics help you monitor your physical exertion and oxygen levels during a dive to ensure you stay within your personal limits.

Descent G1 also includes VO2 Max training, Body Battery energy monitoring, and a sleep score to track your recovery between dives. The Body Battery feature shows your energy levels throughout the day, helping you decide when to schedule a strenuous dive or a rest day. These features allow you to manage your physical readiness by looking at how your body recovers from previous activities.

This Scuba Diving Computer offers 25 hours of battery life in dive mode

The Descent G1 provides up to 25 hours of battery life in dive mode, which allows you to stay on the surface for a full day of snorkeling or complete a 12-hour excursion. Choosing a device with less than 25 hours of dive time could result in a dead unit mid-exploration, requiring you to end your session early. This specific duration ensures you have enough power for long-distance multi-sport triathlons, which typically require 20 hours of tracking.

Descent G1 offers 21 days of battery life in smartwatch mode and 26 hours in GPS mode for daily use. This distinction means you can wear the device as a standard watch for weeks without charging, while still having enough power for a full day of active navigation. Because the battery is rated for 25 hours in dive mode, you can plan longer underwater sessions without worrying about the power supply cutting out before you surface.

Common Buyer Jobs Checked Against the Descent G1’s Specs

The Descent G1 against the jobs buyers ask about, worked out from its listed battery life and a typical need for each job.

If you are just starting out, explore the best entry-level freediving computer options for your needs.

Where the Descent G1 Sits Among the Alternatives

The Descent G1 provides 21 days of battery life in smartwatch mode, which is significantly longer than the 30-hour dive battery life offered by the Garmin Descent Mk2S. This allows the device to remain powered for weeks of daily use while still maintaining its primary function as a scuba diving computer.

• The Garmin Descent G2 46mm Paloma matches the $489.99 price point of the Descent G1.
• The Wearable4U Garmin Descent G1 Solar matches the $489.99 price of the Descent G1.
• The Descent G1 costs $90.01 less than the Shearwater Research Teric Color Wrist Dive Computer.
• The Suunto Ocean Dive Computer SS050984000 is $90.99 cheaper than the Descent G1.
• The Descent G1 is $160 cheaper than the Garmin Descent Mk2S 010-02403-00.
• The Descent G1 ranks as the 3rd highest-rated option among the six products compared.

If you require a color display or a specific Bhlmann ZHL-16c algorithm, the Shearwater Research Teric Color Wrist Dive Computer is the alternative to consider.

What the Price Buys

The Garmin Descent G1 sits at the $489.99 mark, positioned $32 below the $522 average of the similar scuba diving computer products we compared. At this price point, you get a sapphire lens and 24/7 wrist-based HR (heart rate monitoring), but you forgo a color screen in favor of a monochrome display. This choice reduces power consumption, allowing the unit to reach 21 days of battery life in smartwatch mode.

The Descent G1 is the right buy if you need a dedicated subsurface computer that supports GPS, GLONASS, and Galileo for navigation. If you require a color interface or a higher-resolution screen for complex data viewing, you may need to increase your budget. To decide if this fits your needs, check your required daily dive time; if you plan to stay on the surface for more than 20 hours of snorkeling, the 25-hour dive mode limit may be too short.

What It Takes to Run the Descent G1

Setting Up This Subsurface Computer

You must have a smartphone with the Garmin Dive app installed before you can configure the dive computer for use.

1. Unpack the Descent G1 and verify the presence of the silicone bands.
2. Pair the device to your phone via Bluetooth to sync your profile and dive settings.
3. Charge the unit using the included charging cable until the battery indicator is full.
4. Adjust the silicone bands to your wrist size before heading to the water.

Warranty and Support: What to Check

Warranty terms and return policies vary by seller and country.

• Confirm the sapphire lens is free of cracks to ensure the screen remains waterproof.
• Verify the 1.27-inch monochrome display shows no dead pixels before the return window closes.
• Check that the Bluetooth connection remains stable during the initial pairing process.
• Ensure the 2.15-ounce weight feels balanced on your wrist to prevent the unit from shifting during a dive.

Test the device by syncing your first dive and checking the surface entry and exit point markings as soon as it arrives.

Questions Buyers Ask About This Scuba Diving Computer

How many dives can I save on the Garmin Descent G1?

The Garmin Descent G1 stores up to 200 dives in its internal memory before the device begins overwriting older entries. This capacity allows you to maintain a significant history of underwater sessions without needing to manually export data frequently.

Is the Descent G1 Right for You?

Who the Descent G1 suits and the jobs it is the wrong choice for, listed below with the reason for each.

Where to Buy This Dive Computer

When we looked in November 2026, the Descent G1 was listed at $489.99 – a snapshot that may have changed since.

Scuba diving computers are sold by the retailers below – we do not track which of them has the Descent G1 in stock, so check availability and the current price with the retailer before making a trip.

• Amazon (online only) — massive selection and easy comparison of consumer models
• ScubaGear (online only) — specialist retailer with deep technical inventory
• Triton Sports (online and physical stores) — specialist retailer with expert staff and technical gear
• DiveInn (online only) — large online catalog for international and domestic brands
• Dick’s Sporting Goods (online and physical stores) — wide availability of mainstream brands and physical locations
• REI (online and physical stores) — reliable inventory of major brands and in-store expert advice

Final Verdict on the Descent G1

If you need a reliable scuba diving computer that balances multi-sport utility with dive-specific tracking, the Descent G1 is a practical choice at around $489.99. The 4.6 rating from 266 buyers indicates a consistent level of satisfaction with its performance in the field.

The Descent G1 features a sapphire lens, which is a hard mineral surface that resists scratches better than standard glass. It also includes a monochrome display, a screen that uses only black and white pixels to improve visibility in bright light and extend battery life. This watch-style dive computer provides 25 hours of battery life in dive mode, which allows for a full day of snorkeling or a long multi-sport triathlon. How long can it stay submerged? It supports a 25-hour dive mode duration, providing enough power for extended surface activities or long-distance tracking.

The device includes 24/7 wrist-based HR for heart rate monitoring and Pulse Ox, which measures blood oxygen levels. It also features Body Battery energy monitoring to track your daily energy reserves and a Sleep score for recovery analysis. For navigation, the unit includes surface entry and exit point marking to help you identify where you began and ended your dive.

You should choose the Descent G1 if you want a device that functions as a smartwatch during the week and a dive computer underwater. It offers 21 days of battery life in smartwatch mode and includes Garmin Pay for contactless payments. The 1.27-inch screen and 2.15-ounce weight make it a compact option for the wrist.

You should choose the Descent G1 if you need a versatile dive computer that doubles as a daily smartwatch and multi-sport tracker for around $489.99.

The 4.6 rating from 266 buyers serves as a strong signal of the device’s reliability and performance across its various modes.

Skip it if: You require a color display or a high-resolution screen, as this model uses a monochrome display.