Shearwater Petrel 3 OC/CC Trimix Dive Computer
The Shearwater Petrel 3 OC/CC Trimix Dive Computer is a premium technical dive computer built for divers who demand exceptional readability, advanced decompression capability and proven performance for open-circuit and closed-circuit diving.
At the centre of the Petrel 3 is a brilliant 2.6-inch full-colour AMOLED display, providing a large, clear view of critical dive information. The screen is protected by toughened aluminosilicate glass and surrounded by a precision titanium bezel, creating a rugged computer designed for serious diving environments.
From recreational air and nitrox through to multi-gas trimix decompression and CCR bailout diving, the Petrel 3 offers the flexibility to grow with your diving and is particularly well suited to experienced recreational, technical and rebreather divers.
Built for Advanced Technical Diving
The Petrel 3 includes dedicated OC Tec mode for multi-gas trimix decompression diving and CC/BO mode for closed-circuit diving using fixed PPO2 setpoints, with fast access to open-circuit bailout when required.
Its standard Bühlmann ZHL-16C decompression model with Gradient Factors gives technical divers extensive control over their decompression strategy, while optional VPM-B and DCIEM algorithms are available separately.
Brilliant 2.6″ AMOLED Display
The large 320 x 240 AMOLED screen provides excellent contrast and highly visible dive information. Its straightforward layout makes depth, time, decompression status, gas information and other important data easy to identify at a glance.
A simple two-button interface and state-aware menu system make navigating settings and functions intuitive, even when wearing thick dive gloves.
Wireless Air Integration
Built-in air integration allows the Petrel 3 to connect with up to four optional Shearwater transmitters.
This provides considerable flexibility for technical setups, including monitoring open-circuit gases, bailout cylinders and other compatible cylinder configurations directly from the computer.
Digital Compass
A built-in three-axis tilt-compensated digital compass provides reliable navigation and is available across all dive modes, reducing the need to carry a separate compass.
Powerful Vibration Alerts
The Petrel 3 features strong vibration alerts designed to attract your attention underwater. Custom alerts can be configured for parameters including maximum depth, dive time and no-decompression limit.
Vibration functionality depends on using a compatible battery type.
User-Replaceable AA Battery
Forget proprietary charging cables. The Petrel 3 operates from a single user-replaceable AA battery, making battery replacement quick and convenient when travelling or diving in remote locations.
Battery life varies depending on battery chemistry, with Shearwater specifying up to approximately 60 hours from a recommended 1.5V lithium AA battery and longer runtimes available with certain compatible battery types.
Shearwater Petrel 3 Dive Modes
- Air
- Nitrox
- 3 Gas Nitrox
- OC Tec – multi-gas trimix decompression
- CC/BO – closed-circuit fixed PPO2 with bailout
- Gauge – bottom timer with stopwatch and dive logging
Petrel 3 Key Features
- Large 2.6-inch AMOLED colour display
- 320 x 240 screen resolution
- Toughened aluminosilicate glass
- Titanium bezel
- Titanium piezo touch buttons
- Air, nitrox and trimix capability
- Open-circuit and closed-circuit diving modes
- Multi-gas decompression support
- Quick OC bailout from CC mode
- Bühlmann ZHL-16C with Gradient Factors
- Integrated dive planning
- Wireless air integration
- Supports up to 4 optional transmitters
- Three-axis tilt-compensated digital compass
- Strong vibration warning system
- Bluetooth connectivity
- Upgradeable firmware
- Approximately 1,000 hours of dive log capacity
- User-replaceable AA battery
- 290 m / 950 ft depth rating
- Designed and built in Canada
- 2-year warranty
Technical Specifications
- Display: 2.6″ / 6.60 cm AMOLED
- Resolution: 320 x 240
- Depth Rating: 290 m / 950 ft
- Gas Support: Up to 5 open-circuit and 5 closed-circuit gases
- Dive Log: Approx. 1,000 hours
- Battery: Single user-replaceable AA
- Dimensions: 83 x 75.5 x 39 mm
- Weight: 266 g
What’s Included
- Shearwater Petrel 3 Dive Computer
- Screen protector
- Double black webbing strap
- Product information guide
- Inspection checklist card
A Serious Dive Computer for Serious Diving
For divers moving into technical, trimix or closed-circuit diving, the Shearwater Petrel 3 offers an outstanding combination of screen visibility, advanced decompression tools, air integration and straightforward operation.
Its large AMOLED display, rugged construction and extensive configuration options make the Petrel 3 an excellent choice for divers looking for a dependable technical dive computer that can handle increasingly advanced diving without becoming unnecessarily complicated.

















