Our technical review of the Garmin Descent G1. A dive computer in a watch format- monochrome but powerful- capable of handling Trimix and CCR diving.
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Observing divers' wrists on the deck of a semi-rigid boat is always informative. You see giant, ultra-bright OLED screens, and increasingly more smartwatches that closely resemble running models. The Garmin Descent G1 fits perfectly into this second category. With its robust polymer case and monochrome screen, it has the look of an all-terrain G-Shock watch.
However, a dive computer is not just an activity timer, it's the tool that manages the diver's decompression safety during each dive. The real question is whether this reduced format sacrifices essential elements: the readability and reliability of vital information. This review aims to determine if the G1 is simply an entry-level gadget or a true technical instrument, and whether the cost savings compared to higher-end models from the brand justify any compromises in screen quality.
| Overall Score: 4.5/5 | Criterion | Score | What it means |
|---|---|---|---|
| Algorithm & decompression stops | 5.0/5 | Customizable Bühlmann model, identical to top-of-the-line models. | |
| Air & multi-gas | 4.6/5 | Surprisingly complete, it handles Trimix and CCR without any issues. | |
| Screen & ergonomics | 3.5/5 | The contrast is good, but the 0.9-inch size requires good eyesight. | |
| Battery life | 4.3/5 | Approximately 25 hours of dive time, a very reliable lithium-ion battery in cold conditions. | |
| Connectivity & app | 4.5/5 | Perfect synchronization and a powerful software ecosystem. | |
| Compass & instruments | 5.0/5 | Precise sensors, with an excellent compensated compass. | |
| Robustness & depth | 4.6/5 | Scratch-resistant sapphire glass and certification to 100 meters. | |
| Price & customer service | 4.5/5 | An unbeatable value for accessing advanced software. |
The G1 can do it all: from simple air diving to multi-bottle Trimix planning, and even serve as a backup computer for a rebreather (CCR). It manages up to 6 different gases (Air, Nitrox up to 100%, Trimix), which is excellent for its category. However, note that this model completely lacks air integration: it cannot connect to a pressure transmitter. This omission is a design choice intended to keep the price down, but it's something divers need to consider.
The rechargeable lithium-ion battery provides approximately 25 hours of underwater use in dive mode. This is more than enough for a weekend or a week-long cruise without having to search for an outlet every evening. The Solar mode, available on some versions, extends the battery life in watch mode while on the surface, but its impact is negligible underwater. The battery's performance in cold temperatures is a strong point, ensuring consistent operation even in colder waters.
This model incorporates a 3D compensated electronic compass, providing accurate underwater navigation. A temperature sensor is also included, providing continuous readings. The G1 particularly excels with its comprehensive freediving and spearfishing modes, making it an excellent companion for divers who practice these disciplines. The accuracy of the sensors is a definite advantage.
Certified to 100 meters (EN13319 standard), the Descent G1 is designed to withstand the rigors of the underwater environment. Ultra-scratch-resistant sapphire glass comes standard on all G1 models, providing superior protection against scratches and impacts. The reinforced polymer case also contributes to its durability, making this computer a reliable instrument for many years of diving.### O8 Price & Customer Service: Democratized Access to Tech Diving Technology
Priced around €550 (or €650 for the Solar model), the Garmin Descent G1 offers excellent value for the software features it includes. Having access to an unlocked Bühlmann algorithm and Trimix/CCR management capabilities at this price point, in a housing with a sapphire crystal, is remarkable. Regarding customer service, Garmin, as a multinational consumer electronics company, offers replacement units if a defect is recognized under warranty. However, the process can sometimes be frustrating, with representatives who may not be specialized in diving, potential delays, and return shipping costs that are your responsibility. It's important to be aware of this, although it doesn't excessively detract from the overall rating, as service is ultimately provided.
The Garmin Descent G1 is designed for adventurous divers, both recreational and technical, with good eyesight, who want the power of Garmin software without breaking the bank. It's perfect for Level 1 or 2 divers, but its full software capabilities are truly utilized by confirmed Nitrox or technical divers. It's ideal for those seeking a reliable and versatile computer for everyday use and more demanding dives, without the bulk of a larger model. Its compact size makes it discreet and practical.This computer is not ideal for divers with presbyopia or those who require wireless air integration. If you have difficulty seeing small text, the small screen size could become a significant drawback. Similarly, if you plan to use air integration in the future, you will need to switch to a different device because the G1 does not offer any options to add this feature later.
Garmin's after-sales service is that of a large consumer electronics multinational. In case of a recognized defect covered by warranty, a replacement unit is usually offered. However, the user experience can sometimes be complex. The support staff are not always specialized in diving, which can lead to delays or misunderstandings. It is also possible that you will be responsible for the cost of returning the equipment. This is something to consider, but the brand does provide after-sales service for its products, even if the process may seem less direct than with specialists in diving.
If the Garmin Descent G1 has piqued your interest, you might be interested in other models from the brand. For an experience with integrated air integration, the Garmin Descent Mk2i offers advanced features. If you are looking for a larger color screen and more extensive customization options, the Garmin Descent Mk2 might meet your expectations. Each Garmin model offers a different approach to diving, but all share the same software reliability.
To compare this computer with other models, see our dive computer comparison tool.
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For scuba diving alone, the solar sensor offers no benefit underwater. It is only useful if you wear the watch daily outdoors to extend battery life on the surface.
The contrast of the monochrome display is excellent, but the font size is objectively small (0.9-inch screen). If you have difficulty with close-up vision, this is not the right model for you.
Yes, the G1 has both haptic (vibration) and audible alerts, which are very useful if you're wearing a thick hood that muffles typical beeps.
Absolutely. It features a native CCR mode and a well-designed bailout gas management system, making it an excellent and compact backup option.
