Why and How to Use This Dive Computer Comparator
During my first years of exploration, especially during teaching dives in Greece or in the deeper waters of the Maldives, I spent whole evenings looking for reliable data to compare my safety instruments.
A dive computer is not a simple fashion accessory. It is the unit that calculates the nitrogen desaturation of our tissues in real time. I built this tool to centralize the actual specifications of each model.
You can select two units to overlay their characteristics. An interactive radar chart immediately displays the differences in performance. The strengths and weaknesses appear in a very visual way.
Our evaluation criteria at AquaExposure are built on eight main pillars. The first pillar is the decompression algorithm. We prefer transparent models based on the Bühlmann ZHL-16C with adjustable Gradient Factors.
The second pillar measures the physical ruggedness and casing design. A diving instrument must resist shocks on a boat deck and saltwater corrosion. The ergonomics of the buttons underwater are also analyzed.
The third pillar evaluates screen readability. AMOLED or color TFT technologies offer superb contrast in the darkness of quarries or caves. Classic segmented LCD screens remain readable in direct sunlight.
The fourth pillar analyzes battery life and power source. A user-replaceable battery offers complete freedom during trips to remote areas. An induction-rechargeable battery is more convenient for daily use.
The fifth pillar concerns connectivity and data transfer. A fast Bluetooth synchronization allows you to log your dives directly on your mobile application. This avoids obsolete proprietary cables.
The sixth pillar validates wireless air integration by transmitter. This convenient option lets you monitor tank pressure directly on the screen. However, it must always be backed up by a mechanical SPG.
The seventh pillar takes into account the presence of a digital compass. A responsive electronic compass greatly facilitates underwater navigation. It also frees up valuable space on the photographer's wrist.
The eighth pillar assesses the quality of the brand's customer support. Feedback on manufacturer responsiveness in case of failure is integrated. A reliable service department ensures a long-lasting investment.
Ultimately, the ideal tool is the one that is completely forgotten once you enter the water. It should let you observe the marine wildlife in complete peace of mind. With stars in your eyes.
Frequently asked questions
Which dive computer should I choose as a beginner?+
For beginners, a simple and affordable computer with a large LCD screen (such as the Suunto Zoop Novo or Cressi Leonardo) is perfect. It provides all essential safety data (Air/Nitrox, depth, no-decompression time) without unnecessary complexity.
What are Gradient Factors and why do they matter?+
Gradient Factors (GF) allow you to adjust the conservativeness of the Bühlmann ZHL-16C algorithm. This is a crucial feature for adjusting decompression stops to your physical fitness or deep dives, typically found in high-end computers (e.g. Shearwater).
Is wireless air integration necessary?+
No, while it lets you read tank pressure on your computer screen, it never replaces the mandatory mechanical backup pressure gauge. Furthermore, transmitters consume more battery and are prone to occasional signal interference.
Should I choose a user-replaceable battery or a rechargeable one?+
Coin-cell batteries offer massive autonomy (1 to 2 years) and are easy to change on the go. Rechargeable batteries are eco-friendly and convenient, but they degrade over time and replacement often requires factory servicing.