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Technical review of the Garmin Descent G2. The new watch-style computer features an AMOLED screen, is rated to 100m, and supports Trimix and CCR diving, but lacks integrated air integration.
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Table of Contents
- 01Introduction
- 02Summary Verdict
- 03O1 Algorithm & Decompression Stops: The Core of Safety
- 04O2 Air & Multi-Gas: Remarkable Software VersatilityGas management is a cornerstone of modern diving, whether it involves air, enriched Nitrox, or complex Trimix blends. The Garmin Descent G2 excels in this area, offering the ability to manage up to 12 different gases, with Nitrox compatibility reaching up to 100% oxygen. Even better, it natively integrates rebreather (CCR) mode, a feature often reserved for high-end dive computers. This software versatility is highly valuable because it opens the door to a wide range of dives, from recreational explorations to the most advanced technical dives. However, it's important to note the complete lack of air integration on this model. This is a deliberate choice by Garmin, which positions the G2 as a compact computer for those who prefer the reliability of a mechanical pressure gauge or who use it in conjunction with another system. While this absence does not detract from the quality of the algorithm, it should be considered in your diving workflow.
- 05O3 Screen & Ergonomics: A Visual RevolutionThe screen is often the first point of contact with a dive computer, and its quality is crucial for comfort and safety. The Garmin Descent G2 represents a significant departure from its predecessor, the G1, by adopting a 1.2-inch color AMOLED touchscreen display with a resolution of 390 x 390 pixels. This technology offers exceptional brightness and contrast, making information perfectly readable even in bright light or in dark depths. To compensate for the compact size of the screen, an "Large Numbers" mode has been cleverly implemented, allowing you to highlight essential data such as TTS or depth. Underwater, the touchscreen is replaced by five waterproof inductive buttons, which are remarkably responsive, even when wearing thick gloves. This is ergonomics designed for action- a user interface so intuitive that you almost forget it's there, allowing you to focus fully on the marine environment.
- 06Battery Life: Endurance for ExplorationAn AMOLED screen, no matter how bright, can consume a lot of power. However, the Garmin Descent G2 successfully combines excellent visual performance with remarkable battery life. Powered by a rechargeable battery, it offers up to 27 hours in dive mode. This extended battery life is a major advantage for liveaboard diving trips or multi-day expeditions, where access to a charging source may be limited. You no longer have to worry about the battery after each dive, the G2 accompanies you with consistent reliability. This provides invaluable peace of mind, offering such generous battery life that you can string together dives without any anxiety, allowing you to focus solely on the beauty of the underwater world.
- 07O5 Connectivity & App: The Garmin EcosystemIn an increasingly connected world, dive computers are no exception. The Garmin Descent G2 incorporates Bluetooth, enabling seamless synchronization with the Garmin Dive app. This app is a true digital dive logbook, offering detailed analysis tools for your dive profiles, bottom times, and decompression stops. It's such a comprehensive interface that managing your data becomes effortless- a simple and effective way to track your progress and share your adventures. Firmware updates via OTA (Over-The-Air) ensure that your computer always benefits from the latest improvements and features, without requiring complex procedures. The Garmin ecosystem promises a consistent and enriching user experience, from underwater to post-dive analysis.
- 08O6 Compass & Instruments: Precision at Your FingertipsUnderwater navigation is an art that requires precision and reliability. The Garmin Descent G2 features a three-axis digital compass that is compensated and functions perfectly underwater. This compass is an essential tool for orientation, whether you are following a course, returning to a starting point, or exploring a new site. In addition, a variometer with audible and vibrating alerts provides real-time information about your ascent and descent rates, which is crucial for respecting decompression stops and preventing decompression sickness. The inclusion of an apnea mode, with specific features, further expands the capabilities of this instrument. It's such a comprehensive suite of instruments that you have all the necessary information for safe and confident navigation, even in the most challenging environments.
- 09O7 Robustness & Depth: Designed for AdventureDiving is a demanding environment, and the equipment must be up to the challenge. The Garmin Descent G2 is certified EN13319 for a depth of 100 meters, demonstrating its robustness and reliability. Its casing, made from recycled ocean plastic (OBP), is topped with sapphire glass. This choice of materials is significant- sapphire glass is renowned for its exceptional scratch resistance, ensuring perfect screen readability even after numerous dives. It's a design that reflects Garmin's commitment to providing a durable instrument that respects the marine environment we explore. The G2 is ready for adventure, a reliable companion that won't let you down, even in the most challenging conditions.
- 10O8 Price & Customer Service: A Considered InvestmentThe price is often a key factor when choosing a dive computer. Launched at around €700, the Garmin Descent G2 is aggressively priced in the market, offering access to advanced features in a compact format. The price is so competitive that one might wonder how Garmin manages to offer such a high level of performance. Regarding after-sales service, Garmin benefits from a premium network worldwide. However, the customer support of a large multinational electronics company can sometimes be a frustrating experience. While replacement units are often offered for recognized defects under warranty, the representatives are not always specialized in diving, and processing times can be longer. It may sometimes be necessary to return the device at your own expense. This isn't necessarily a negative point on the overall rating, but it is a factual consideration. The standard 2-year warranty meets expectations, but the quality of the experience will often depend on the user's persistence.
- 11Who is this computer for?The Garmin Descent G2 is designed for a diverse range of divers with specific needs. It's ideal for technical or recreational divers who want an ultra-bright display and a discreet watch format, while preferring to manage air using a mechanical pressure gauge. It's the perfect companion for those who appreciate the versatility of its software (multi-gas, CCR) and Garmin's connected ecosystem, but don't require integrated air management on their wrist. Its robustness and battery life make it an excellent choice for travelers and those who enjoy dive cruises. However, this computer is not ideal for divers who absolutely rely on air management via a transmitter, or for those who, due to presbyopia, need a very large screen for optimal readability. It's all about finding the right balance- choosing the tool that precisely matches your diving style and preferences.
- 12Service and SupportThe after-sales service (customer support) is often overlooked when making a purchase, but it becomes crucial if you need assistance. For Garmin, the customer support is that of a large multinational electronics company. This means you benefit from an extensive network and the possibility of replacement with a new unit if the fault is covered by warranty. This is a strength, providing assurance that you won't be left without a solution. However, the experience can sometimes be less straightforward than what is offered by brands specializing in diving. The support staff are not always experts in the underwater world, which can lead to delays or misunderstandings. Sometimes, persistence is required, and the cost of returning the device may be your responsibility. Therefore, it is recommended to go through an authorized dealer who can act as a liaison and guide you through the process. The standard 2-year warranty is a legal minimum, but the quality of support will largely depend on your ability to navigate what can sometimes be a complex system.
- 13Power SupplyThe Garmin Descent G2 is powered by a rechargeable battery, a choice that has both advantages and disadvantages. The main advantage is convenience: there's no need to change batteries, a simple recharge is all that's required. It's such a practical solution that you almost forget about the limitation. The 27-hour battery life in dive mode is more than sufficient for most uses, including multi-day trips. However, this means remembering your charging cable and having access to a power source. For long journeys or expeditions in remote locations, it's always wise to have a portable power bank or adapter on hand. This is a different approach from using replaceable batteries, it requires getting used to it, but it offers great flexibility and reduces waste.
- 14Links to other models from the same brandIf the Garmin Descent G2 has caught your attention, it is worth exploring other offerings from the brand. Garmin offers a diverse range of dive computers, each with its own specific features. For an integrated air system on your wrist, you might consider the [Garmin Descent Mk3](/en/blog/test-garmin-descent-mk3). If you are looking for a simpler and more affordable model, the [Garmin Descent S1](/en/blog/test-garmin-descent-s1) could be a relevant option. Each model caters to different needs, and it is essential to compare them to find the one that best suits your diving style.
- 15Dive Computer Comparison Tool
Questions about the Journal
What are the major improvements in the Garmin Descent G2 compared to the G1?
The major change is the integration of a color AMOLED touchscreen, which replaces the monochrome screen of the previous generation, while still offering excellent battery life.
Can I connect an air pressure sensor to the Descent G2?
No. As with the previous generation, Garmin has chosen not to include a wireless receiver in this model.
Is the dive computer scratch-resistant?
Yes, unlike many mid-range models, the G2 comes standard with a sapphire glass that is particularly resistant to abrasive contact.
