A Diver's Ultimate Adventure Tool! Garmin X50i Unboxing: Square Screen & Technical Diving Features Revealed

For those who love scuba diving and outdoor adventure, choosing a high-performance dive computer is undoubtedly the key to enhanced safety. Recently, the Editor had the privilege of personally experiencing Garmin's brand-new dive computer — the Garmin Descent X50i — in the world-renowned waters of Palau. This dive computer not only boasts advanced diving features, but also delivers exceptional performance in outdoor adventures, enabling the ultimate exploration experience. Let the Editor take you through this unboxing and show you how this product performed in the underwater ecosystems of Palau, along with a look at its standout features.

A Breathtaking Underwater Experience in Palau

Palau's waters are crystal clear, and its kaleidoscopic coral reefs and free-roaming marine life create an incomparable underwater landscape. The depth and visibility here make it an undisputed paradise for divers. In these stunningly beautiful waters, the Editor brought along the Garmin Descent X50i dive computer (hereafter referred to as the X50i) for a comprehensive test.

First Impressions of the Garmin X50i — Conclusion First

• A square 3-inch screen that directly targets the needs of professional technical divers — clear, intuitive, and makes checking all dive data effortless.
• Ideal for users aged 40 and above, especially those with presbyopia; the square design and large screen offer a far more user-friendly visual experience for older users.
• Sapphire glass screen — among square-design dive computers currently on the market, only the Garmin X50i offers sapphire glass: scratch-resistant and highly durable, maintaining a like-new finish whether diving or in daily use.
• Supports up to 8 T2 SubWave transmitters, and is also compatible with T1 transmitters, catering to multi-cylinder diving needs.
• ＠+5 and Δ+5 advanced dive metrics help divers more precisely manage decompression and dive planning, enhancing dive safety.
• Dynamic dive profile — an outstanding feature that graphically displays your ascent based on depth and dive time, reminding you when to stop, when to switch gases, and more, providing greater safety assurance.

The X50i is water-resistant to 200m, far exceeding the 100m rating of some competing products. For divers looking to venture into technical diving in the future, this depth rating is an essential factor for enhanced safety and convenience.

Enhanced Visuals and User Experience with the 3-Inch Large Screen

Thanks to the advantages of its square screen, the X50i's display is larger than that of the Mk3i and offers significantly clearer readability. The sapphire glass screen is not only scratch- and abrasion-resistant, but also delivers superior display quality — the highest glass grade available among comparably positioned products on the market today.

Touch technology also greatly enhances ease of use on land, making every interaction smooth and effortless. Compared to similar products, the X50i features four tactile feedback buttons, allowing divers to operate the device quickly and accurately even underwater, without worrying about fumbling for information in deep water — providing a seamless and fluid user experience throughout.

In addition, the X50i features vibration and audible alert functions that instantly notify divers of any abnormal dive conditions, effectively enhancing dive safety. Beyond the core dive computer functionality, the X50i's Torch performance is also impressive. The built-in Torch is brighter than that of the Mk3i, and supports both short-flash and long-flash modes. While red light is not yet supported, the intensity and stability of its white light more than meet the demands of being a backup light source during night diving.

SubWave Sonar and Scuba Tank / Cylinder Monitoring

The X50i is equipped with a powerful dive sonar system, and like the Mk3i, supports up to 8 Descent T2 transmitters for scuba tank / cylinder monitoring. This means that whether on deep-sea explorations or extended dive trips, the X50i can monitor in real time and provide accurate cylinder data, helping divers better manage their air supply throughout the dive and avoid unexpected incidents. According to official specifications, the cylinder pressure monitoring range is 10m, displaying dive buddy depth and horizontal distance, and allowing preset messages to be exchanged with dive buddies within up to 30m.

Of course, the X50i also supports multi-gas dive modes, including enriched air nitrox (EANx) and trimix, and allows custom configuration of GF values and PPO2 settings, meeting the needs of every diver pushing their limits.

Multi-Function Integration and Navigation Support

Beyond diving, the X50i is also a powerful outdoor sports watch. When purchased by consumers in Taiwan, it comes preloaded with detailed maps of the Asia region and supports simple point-to-point navigation. If you want to find your location in the open ocean and identify the positions of surrounding islands, Garmin's map data support becomes critically important. For users in Europe or North America, the latest map updates can be downloaded via Garmin Express.

Relying on its map data and superior satellite positioning capabilities, the X50i also supports inReach integration (expected to be enabled via a future OTA update), allowing users in extreme outdoor environments to stay connected with the outside world via satellite, and even send emergency distress signals. For adventurers who enjoy challenging open-ocean dive sites or cave diving deep in the mountains, this is undoubtedly an essential safety feature.

Also thanks to the 3-inch large screen, the X50i allows divers to view underwater topographic charts directly on land, giving them a more intuitive understanding of the underwater environment and planned dive routes — a feature that appears to be unique among all dive computer products. The only limitation is that map data currently supports only the United States and certain other countries; here's hoping that Taiwan can gradually unlock nautical chart functionality in the future!

Additionally, the X50i will be able to display tidal data in the future, helping divers better plan their dive timing and locations. Before using this feature, pairing must be completed via the Garmin Dive App to retrieve data. This feature is expected to be unlocked via a mobile app OTA update in the future.

Technical Diving Exclusive Features: Dynamic Dive Profile and Advanced Technical Diving Metrics

One of the X50i's standout features for technical diving is its support for a dynamic ascent profile. This function allows divers to clearly visualize past, present, and future dive depths and ascent rates in a graphical format, enabling divers to monitor their depth status at any time underwater, identify critical gas-switching moments, and avoid decompression sickness (DCS) caused by ascending too rapidly.

The ＠+5 and Δ+5 advanced technical diving metrics are calculated in real time by the dive computer to reflect the increase in TTS (Total Time to Surface) incurred by the diver staying at a given depth, serving as one of the reference factors for evaluating whether to continue remaining at that depth.

• ＠+5: represents "the TTS if the diver stays at the current depth for an additional 5 minutes." This metric gives divers an instant reference point to understand the overall impact on the dive plan of spending more time at the current depth.
• Δ+5: represents "the additional decompression time that would accumulate (compared to TTS) if the diver maintains the current depth for the next 5 minutes." This helps divers decide whether to continue at the current depth or begin ascending to avoid accumulating excessive decompression time.
• The relationship between Δ+5, @+5, and TTS: @+5 − TTS = Δ+5

Before You Buy — Important Notes

Of course, while the X50i is an extremely capable device, there are some features it does not support that you should be fully aware of before making a purchase. First, the X50i does not have a built-in heart rate monitor, which may be a minor shortcoming for those who like to combine diving with general fitness tracking.

Second, the X50i does not support freediving mode, which will be disappointing for users who enjoy freediving or spearfishing (though it's fair to say that very few freedivers would strap on a dive computer this size for a freediving session). After all, this product is positioned more towards professional technical divers rather than freedivers.

Closing Thoughts: Only Garmin Can Out-Garmin Garmin

In summary, the Garmin Descent X50i is an exceptionally powerful dive computer, and for advanced divers looking to tackle great depths who need high-precision dive data and robust safety features, this device is undoubtedly an ideal choice. The only drawback is its relatively high price compared to similarly positioned products — something you should carefully evaluate multiple times before committing to a purchase.

If you're struggling to choose between models in the Garmin Descent series, the Editor offers this simple decision guide:

• Need daily wearability, multi-sport features, and working with a tighter budget => G1.
• Need daily wearability, multi-sport features, and have a deeper budget => Mk3i (available in different case sizes, with or without transmitter support).
• No need for daily wear, focused on technical diving => X50i.

Having visited Garmin's PM team, the Editor gained a deep appreciation for what Garmin hopes to achieve with the Garmin Descent X50i. Out of curiosity, the Editor asked the PM: why develop a product line for such a niche market — especially one with a square form factor that completely steps outside the design strengths of Garmin's existing product lineup (for instance, the square casing required entirely new mold tooling)?

The Garmin Descent X50i fills a gap in the Garmin Descent product line. We want to meet the needs of every consumer in the dive market — please look forward to even more innovative products coming to the Garmin Descent diving ecosystem in the future!

Garmin PM

Related Links

• Garmin X50i Dive Computer Official Website
• Garmin Dive Dedicated Website
• Garmin Dive App

Further Reading