SEAC Guru dive computer review: The complete technical watch.

To learn how to get the most out of your gear underwater, discover the [AquaExposure Training](/lms). ## Introduction

In the world of diving, choosing a dive computer is a decision that affects both the safety and enjoyment of every dive. It's an extension of our judgment, a silent companion that guides us in the depths. The watch-style format, with its elegance and discretion, has always held a particular appeal for divers. It offers the undeniable advantage of an instrument that can be worn on the wrist between dives, or even daily, without ever being taken off. However, miniaturizing technology without sacrificing readability or essential safety features represents a significant technical challenge. It is within this context that we are examining the SEAC Guru, a model that promises to reconcile these requirements. We will see if this computer manages to maintain flawless readability and ergonomics underwater, while also offering the features expected by demanding divers.

Overall score: 3.5/5

Algorithm & tiers (O1: 3.9/5)

The SEAC Guru dive computer incorporates a Bühlmann ZHL-16C decompression algorithm, a proprietary variant known for its robustness and reliability. Instead of offering adjustable gradient factors, this model provides the user with the option to configure 6 levels of conservatism. This approach is particularly safe. It allows users to personalize their dive profile based on perceived fatigue, immersion conditions, or the difficulty of the series of dives. This is a very, very, very effective way to adapt your safety profile without getting lost in complex settings. The computer is not a substitute for training, it is an auxiliary device that must be understood and mastered. This score of 3.9/5 reflects a high level of algorithmic reliability, with appreciable flexibility for the experienced diver.

Air & mixed gases (O2: 2.2/5)

The SEAC Guru is designed for managing air and Nitrox mixtures. It allows you to manage two different gases, with oxygen percentages ranging from 21% to 99%. This capacity is sufficient for the vast majority of recreational dives and for some lighter technical dives requiring a decompression gas. The device offers a gas switching function, which is an advantage for more complex dive profiles. However, it's important to note the lack of support for Trimix and CCR (Closed Circuit Rebreather), which limits its use to specific applications. It features wireless air integration, which is undoubtedly convenient for reading tank pressure. The score of 2.2/5 reflects a classic gas management system that is effective within its segment but limited for deeper explorations or advanced technical dives.

Screen & Ergonomics (O3: 3.3/5)

In a case the size of a wristwatch, SEAC has managed to fit an 80x80 pixel graphic LCD screen. The intensity of the "SuperBright" LED backlight is manually adjustable. This allows it to adapt to all visibility conditions, from dark waters to sunny days. The interface, controlled by four buttons, provides intuitive access to settings. The stainless steel bezel adds a touch of robustness and elegance. The watch format inherently imposes a smaller display. This may be a factor to consider for divers with vision problems or those who prefer a larger screen for quickly reading essential information. The score of 3.3/5 highlights good brightness and a well-designed interface, but with the inherent limitation of the screen size.

Battery Life (O4: 4.0/5)

The SEAC Guru eliminates the constraints associated with battery changes thanks to its rechargeable lithium-ion battery. It recharges in 3 to 5 hours via the included USB cable, a significant convenience for travel and frequent use. The battery life reaches up to 25 hours in continuous dive mode, or 2 to 3 months in classic watch mode. This is a very solid performance that provides peace of mind for cruises or extended diving sessions. However, it is crucial to note that exposure to very cold water (below 3°C) can negatively affect the battery voltage and reduce its operating time. This information is essential for divers in cold waters. The score of 4.0/5 reflects a very comfortable battery life and a modern and practical power solution.

Connectivity & App (Rating: 3.0/5)

Although the SEAC Guru is a high-end computer, data transfer does not occur via Bluetooth. The included USB cable is the only way to download dive logs to the DiveLogger software and to keep the firmware up to date. Updates can be installed by the user, which is an advantage for maintenance. The lack of Bluetooth connectivity to smartphones may be seen as a disadvantage by some users who are accustomed to automatic synchronization. However, a wired connection often offers greater stability and security for critical data transfers. The score of 3.0/5 reflects functional and reliable connectivity, but it does not meet everyone's expectations in terms of modernity and ease of mobile use.

Compass & Instruments (Rating: 5.0/5)

The undeniable strength of the SEAC Guru is its integrated 3D digital compass with inclination compensation, offering remarkable precision and ease of use for underwater orientation. Beyond the Scuba, Gauge, and Freediving modes, it functions as a true "outdoor" watch. It features an altimeter, barometer, weather forecasts, lunar phases, and a fitness function (pedometer, calories). The freediving mode is particularly comprehensive, providing time, depth, descent rate, and ascent rate. This wealth of instrumentation makes the Guru a versatile tool, equally useful underwater and on land. The perfect score of 5.0/5 is well-deserved for this suite of features that far exceeds the expectations of a simple dive computer.

Robustness & Depth (O7: 4.1/5)

The manufacturing quality of the SEAC Guru is exemplary. Its casing, made of high-strength technopolymers, is surrounded by a stainless steel ring and protected by mineral glass. These premium materials guarantee durability and resistance to shocks and scratches. The computer is designed to withstand a maximum depth of 150 meters, a certification that attests to its reliability for even the most demanding dives. Robustness is a fundamental criterion for diving equipment, and the Guru delivers with careful finishes and proven materials. The score of 4.1/5 highlights a solid design and the ability to withstand the rigors of the underwater environment.

Price & Customer Service (Rating: 3.6/5)

Typically priced around €600 - €680 depending on the country, the price of the SEAC Guru reflects its advanced features. The rechargeable Li-ion battery, wireless air integration, and 3D compass are elements that justify this significant investment. The observed price of approximately €683 positions this computer as a relevant choice for a multi-function watch model. Regarding customer service, SEAC has a rather average reputation. Unanswered emails from the Italian headquarters have been reported on forums. It is imperative to go through a reseller who will actively advocate for you if you have any questions or problems. The reseller really acts as an intermediary. This point should be considered when making a purchase. The score of 3.6/5 represents good value for money considering the features offered, but after-sales service may be a point of concern.

The SEAC Guru is a dive computer specifically designed for diving instructors and travelers. Its versatility, high-performance compass, and rechargeable battery make it an ideal tool to keep on your wrist all day, both underwater and on the surface. It's perfectly suited for divers at Level 2, Advanced, or Level 3 who practice underwater navigation, decompression using mixed gases (Nitrox), and even freediving. It's a great choice for those seeking a complete and reliable instrument for their explorations. However, this computer is not ideal for divers looking for a very large screen for visual comfort, or those who need Bluetooth connectivity to a smartphone for quick and wireless synchronization. It also does not support Trimix, which limits its use to recreational and light technical diving.

The after-sales service of SEAC is a point that deserves special attention. While the computer itself is a concentration of technology and robustness, the brand's after-sales reputation is quite average. User feedback on forums mentions unanswered emails from the Italian headquarters. In this context, it is imperative to rely on a competent and proactive local reseller. It is they who will act as an intermediary and insist with the manufacturer if necessary. The quality of your experience with after-sales support will therefore depend heavily on the diligence of your reseller. It is advisable to thoroughly research the reputation of the distributor before making a purchase.

The SEAC Guru is equipped with a rechargeable lithium-ion battery, a feature that greatly simplifies its daily use. No more hassle related to changing batteries, the battery recharges easily via the provided USB cable. A full charge provides up to 25 hours of battery life in dive mode, which is more than enough for a week of cruising or numerous consecutive dives. For everyday use as a watch, the battery life extends to 2 or 3 months. This power solution is a major advantage for practicality and reducing environmental impact. It's worth remembering that prolonged exposure to very cold water may slightly affect battery performance.

If the SEAC Guru has piqued your interest, the SEAC brand offers other models that might suit different needs. For a more in-depth look at the range, you can consult our dedicated reviews:

[SEAC Partner Test](/en/blog/seac-partner-test-the-essentials-of-freediving-at-an-unbeatable-price) SEAC Jack Test

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

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