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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesThe Bühlmann Decompression 02 is a limited-edition Swiss mechanical dive watch that displays decompression-stop times for 17 specified recreational dive profiles. Its rotating dial and separate timing bezels are designed as an analog backup to a dive computer—not a replacement for one or a universal decompression calculator.
What is the Bühlmann Decompression 02?
Made by Bühlmann Watches, the Decompression 02 translates selected decompression-table information into a mechanical wristwatch. The company says its concept draws on the work of Swiss physician Prof. Albert A. Bühlmann and his ZH-L16 decompression model. The brand describes the watch as an instrument to complement a digital dive computer.
In a company-published article, CEO Guido Benedini put that role plainly: “The Decompression 02 was designed to complement dive computers, not to compete with them.”
How the decompression display works
Choose one of the stated profiles
Bühlmann Watches says the rotating lower dial presents decompression-stop times for 17 “Golden Zone” recreational profiles. The stated scope is single-tank dives up to 39 metres, at altitudes from 0 to 700 metres above sea level. The user selects a profile with the right crown, after which the display shows the associated decompression-stop information.
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- Versatile Dive Modes: Dive into fall adventures with the Cressi Leonardo 2.0, a dive computer watch featuring Air, Nitrox, and Gauge modes. This scuba diving watch adapts seamlessly to diverse setups, making it perfect for autumn's cooler underwater explorations
- Simplified Control Interface: Navigate menus effortlessly with the single-button interface of this diving watch. Its intuitive design ensures that even in the brisk fall waters, you maintain straightforward control over your dive settings
- Quick Critical Alerts: Stay alert with visual and audible alarms that quickly notify you of essential dive data. As fall brings new underwater challenges, these alerts ensure your safety and preparedness during every scuba diving experience
- Seamless Device Integration: Pair your dive computer watch with iOS and Android devices for comprehensive dive tracking. Whether you're analyzing autumn dives from your smartphone or tablet, cross-platform compatibility ensures seamless connectivity
- Efficient Data Management: Transfer dive logs easily with USB and infrared capabilities, allowing for detailed analysis. Even as the fall season introduces new diving conditions, managing your scuba diving computer data remains efficient and thorough
That scope matters: the display is tied to a defined set of profiles, not every possible depth, dive plan, or set of conditions. A diver should not assume the watch has a matching profile for a planned dive simply because it displays decompression stops.
Track dive time and stop time separately
The Twin Safety Bezel separates total dive-time tracking from decompression-stop timing. In the manufacturer’s described procedure, the diver sets the total-dive-time bezel before entering the water and uses it to track bottom time. A separate outer scale is used to time stops. The two bezels are intended to turn in different directions to reduce the risk of accidental movement in an unsafe direction. The company also describes the seconds hand as a way to monitor ascent rate.
Rank #2
- Versatile Dive Modes: Dive into fall adventures with the Cressi Leonardo 2.0, a dive computer watch featuring Air, Nitrox, and Gauge modes. This scuba diving watch adapts seamlessly to diverse setups, making it perfect for autumn's cooler underwater explorations
- Simplified Control Interface: Navigate menus effortlessly with the single-button interface of this diving watch. Its intuitive design ensures that even in the brisk fall waters, you maintain straightforward control over your dive settings
- Quick Critical Alerts: Stay alert with visual and audible alarms that quickly notify you of essential dive data. As fall brings new underwater challenges, these alerts ensure your safety and preparedness during every scuba diving experience
- Seamless Device Integration: Pair your dive computer watch with iOS and Android devices for comprehensive dive tracking. Whether you're analyzing autumn dives from your smartphone or tablet, cross-platform compatibility ensures seamless connectivity
- Efficient Data Management: Transfer dive logs easily with USB and infrared capabilities, allowing for detailed analysis. Even as the fall season introduces new diving conditions, managing your scuba diving computer data remains efficient and thorough
Set the fly/no-fly indicator after the dive
The watch includes a fly/no-fly indicator. Bühlmann Watches says the diver sets it after surfacing and waits for the indicator to reach the green zone; the brand’s homepage gives a 36–48-hour interval. This is the manufacturer’s description of the indicator, not individualized advice about when a particular diver can safely fly.
What the watch can—and cannot—tell you
A mechanical display can make selected table information available without relying on an electronic screen, but the manufacturer’s stated coverage is limited to its 17 profiles. The product information does not establish that the watch can calculate a custom profile or cover every dive. It should not be treated as a substitute for a current dive computer or for dive planning appropriate to the specific dive.
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Rank #3
- Versatile Dive Modes: Dive into fall adventures with the Cressi Leonardo 2.0, a dive computer watch featuring Air, Nitrox, and Gauge modes. This scuba diving watch adapts seamlessly to diverse setups, making it perfect for autumn's cooler underwater explorations
- Simplified Control Interface: Navigate menus effortlessly with the single-button interface of this diving watch. Its intuitive design ensures that even in the brisk fall waters, you maintain straightforward control over your dive settings
- Quick Critical Alerts: Stay alert with visual and audible alarms that quickly notify you of essential dive data. As fall brings new underwater challenges, these alerts ensure your safety and preparedness during every scuba diving experience
- Seamless Device Integration: Pair your dive computer watch with iOS and Android devices for comprehensive dive tracking. Whether you're analyzing autumn dives from your smartphone or tablet, cross-platform compatibility ensures seamless connectivity
- Efficient Data Management: Transfer dive logs easily with USB and infrared capabilities, allowing for detailed analysis. Even as the fall season introduces new diving conditions, managing your scuba diving computer data remains efficient and thorough
Bühlmann Watches says the watch was developed with professional divers and functionally validated by decompression-science specialists, including former members of the Bühlmann research team, DAN Europe, and CMAS Switzerland. Those are manufacturer-reported statements. The cited company materials do not provide an independent technical test report or comparative safety-outcome data, so they do not establish independent performance or safety superiority.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Specifications and current purchase details
The following specifications and commercial details are stated by Bühlmann Watches on its product and FAQ pages. Price and delivery estimates can change, so check the official listing before ordering.
Rank #4
- Rugged, watch-style dive computer with a 1.2” AMOLED display, sapphire lens and leakproof buttons — plus a 10 ATM dive rating - phsyical size 45.5 x 45.5 x 15.2 mm fits wrist sizes : Silicone Band: 128-224 mm Extra Long Silicone Band: 128-373 mm
- Support for all types of diving, including recreational, advanced, technical, freediving and pool apnea
- 100% of the plastic used to make the watch’s housing, bezel and buttons comes from recycled ocean-bound plastics
- Multi-GNSS support allows divers to mark surface entry and exit points so you can see exactly where you started and ended the dive
- Track your activities with built-in sports apps and advanced training features such as VO2 max, so you can see how your body is adapting to training (data presented is intended to be a close estimation of metrics tracked)
| Detail | Manufacturer-stated information |
|---|---|
| Movement | Swiss-made SW300 automatic |
| Case | 48.5 mm stainless steel |
| Bezel and crystal | Ceramic bezel; sapphire crystal |
| Water resistance | 57.5 ATM / 575 metres |
| Edition | Limited edition of 575 pieces |
| Listed price | CHF 3,990, including shipping, VAT, and duties, as listed on the official product page accessed 7 October 2026 |
| Deposit option | 25%, according to the official product page accessed 7 October 2026 |
| Production and dispatch | The official FAQ said the watch was in production, with dispatch estimated to start in October 2026, as of 7 October 2026 |
| Warranty | Five-year international warranty for manufacturing defects; strap and crystal excluded, according to the official FAQ accessed 7 October 2026 |
The company’s 2025 article also quotes Beat A. Müller, MSc Mech. Eng. ETH and a former member of the Bühlmann Research Team at the University Hospital of Zürich, calling it “a marvellous piece of micro-machinery and Swiss precision.” Thomas Bühlmann, a board member of Bühlmann Dive Watches, is quoted in the same company article: “My father always believed that science should serve safety.” These are quotations published by the manufacturer.
Quick Recap
Best Value
- Package dimensions: 6.69 inch L x 4.45 inch W x 4.33 inch H
- Two-button interface: simple to navigate, state-aware menu structure. 316 stainless steel buttons
- Battery life per charge is up to about 30 hours on medium brightness level
- USB wireless charging station is included
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
