Review of the Shearwater Tern: Excellent AMOLED technology now within reach.

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I am often asked if it is really necessary to spend more than a thousand euros to have a readable screen on a dive computer. A dive computer is not just a simple accessory, it is the critical tool that manages your decompression safety. Until now, at Shearwater, the AMOLED screen was reserved for the Teric, a high-end model that was very expensive.

The Shearwater Tern changes the game. By removing complex functions, such as Trimix or air management, which most divers don't need, the brand offers a compact, elegant device that is above all exceptionally clear. This test aims to confirm whether, beyond its attractive price, it lives up to the reputation for robustness of its predecessors.

The Shearwater Tern is a top choice for demanding recreational divers. Here is our comprehensive evaluation, based on our rigorous analysis grid.

Overall score: 4.2/5

O1 Algorithm & Milestones

As with all models from the brand, safety is never an option. The device provides you with all the tools to understand your decompression process. It uses the Bühlmann ZHL-16C algorithm with adjustable gradient factors, offering a complete range of adjustments. The detailed display of decompression information is impeccable. The haptic alerts, in the form of vibrations, are a real advantage for ensuring that no alarm is missed underwater. The historical reliability of this algorithm at Shearwater is well established.

O2 Air & Multi-Gas

The Tern is designed for recreational diving, and it does a great job. It perfectly manages air and Nitrox, allowing you to configure up to 3 different gases. However, it doesn't support Trimix or rebreathers (CCR), which is a deliberate choice to maintain an affordable price and a clean interface. It's crucial to note that this model does not offer wireless air integration, a feature reserved for its bigger brother, the Tern TX.

O3 Screen & Ergonomics

The AMOLED screen is the heart of this device. The black is absolute, the colors are vibrant, which makes reading intuitive even in poor visibility conditions. With a high resolution for its 1.3-inch size, the screen compensates for its small surface area with infinite contrast. The four-button navigation is clear, intuitive, and perfectly usable even with thick gloves. The display customization is extensive, allowing each diver to organize the information according to their preferences.

O4 Autonomy & Battery

The battery life is a strong point for a watch-style computer with such a bright screen. The rechargeable Li-ion battery offers approximately 20 hours of use in dive mode, which is more than enough for an intensive weekend or a short cruise. The battery indicator is accurate, avoiding unpleasant surprises. Furthermore, the reliability of the battery in cold water is excellent, a detail that is important for divers in lakes or quarries.

O5 Connectivity & App

Shearwater excels in this area. Native Bluetooth enables fast and seamless synchronization with the Shearwater Cloud application, which is a benchmark for digital dive logs. Firmware updates are easily performed over-the-air (OTA), ensuring that your computer always benefits from the latest improvements. Data export is open, facilitating integration with other dive log software.

O6 Compass & Instruments

This is where the Tern makes compromises. It lacks a digital compass, which explains its lower score in this category. Therefore, you will need to equip it with a traditional analog compass. On the other hand, it features a very precise temperature sensor and offers a complete freediving mode, which will delight enthusiasts of this discipline.

07 Robustness & Depth

Despite its elegant everyday watch appearance, the Tern is a true diving instrument. It is certified for a maximum depth of 120 meters, which more than covers the needs of recreational diving and even beyond. The tempered mineral glass offers good scratch resistance, although one should always remain vigilant. The CE manufacturer certification provides reassurance regarding the overall quality of construction.

O8 Price & Customer Support

The Tern's pricing strategy is key. It offers the best price to access AMOLED technology from Shearwater. The brand's after-sales service is an absolute benchmark in the diving industry. With regional expert centers and a well-documented out-of-warranty replacement policy, you are investing in peace of mind. The standard 2-year warranty completes this very positive picture.

The Shearwater Tern is the ideal companion for recreational divers who prioritize clarity and ease of use. Whether you are a beginner looking for a reliable and intuitive instrument, or an experienced Nitrox diver wanting an AMOLED screen without the complex and expensive features of technical diving computers, this computer is made for you. It will be perfect for those who value readability and safety without compromising on aesthetics. However, if wireless air integration is an essential feature, or if your dives take you into Trimix or rebreather territory, the Tern may not be the most suitable choice. It is crucial to clearly define your needs before making a decision, as this computer is optimized for specific uses.

Shearwater's after-sales service is an absolute benchmark in the diving industry. The brand has built a reputation for excellence thanks to expert regional centers that can intervene quickly and effectively. The out-of-warranty replacement process is clearly documented, offering a level of transparency and peace of mind that is rare. To date, no significant weaknesses have been identified regarding Shearwater's support, which further reinforces confidence in this investment. This is a crucial factor for safety equipment as essential as a dive computer.

The Shearwater Tern is equipped with a rechargeable Li-ion battery, offering approximately 20 hours of dive time. This solution offers undeniable advantages for daily use, eliminating the need for disposable batteries. Charging is done via an induction base, a practical and reliable system. For trips or extended cruises, it's advisable to bring a power adapter and the charging cable, as access to an electrical outlet will be necessary. The precise battery status indicator allows you to anticipate recharges and avoid any unexpected interruptions during your dives.

If the Shearwater Tern has piqued your interest, be aware that the Shearwater range offers other models, each with its own specific features. For integrated air management and a digital compass, you might be interested in the Shearwater Tern TX. For technical divers or those looking for a more compact format, the Shearwater Perdix 2 or the Shearwater Teric might meet your expectations. Each model is designed with the same rigor and safety philosophy that characterize the brand.

To compare this computer with other models, see our diving computer comparison tool.

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