Shearwater Petrel 3 OC/CC Trimix Dive Computer

Shearwater Petrel 3 OC/CC Trimix Dive Computer

The Shearwater Petrel 3 OC/CC Trimix Dive Computer is a technical dive computer built for divers who demand 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

• 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 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.

How the Features Help

• Reading the display: Colour presentation separates key data such as depth, dive time and gas information. Set brightness and the available screen layout before entering the water so the information you use is easy to find.
• Controls: The listed button layout provides access to settings and alternative views. Practise navigation with your normal gloves and exposure equipment before diving.
• Navigation: A digital compass brings heading information to the same instrument as your dive data. Calibrate it as instructed and practise the available bearing and reciprocal-heading functions on the surface.
• Cylinder-pressure information: With the specified compatible transmitter, the computer shows cylinder-pressure data at your wrist. Pair each transmitter to its correct gas and check the surface reading; gas-time estimates support your existing gas plan.
• Keeping your dive record: The supported connection transfers dive logs for post-dive review and, where supported, software updates. Optional external interfaces remain separate accessories unless included in this package.
• Replaceable battery: The stated user-replaceable battery can be changed using the model’s prescribed procedure. Battery type, seals, tools and data-retention steps are specific to that computer.

Choosing and Setting Up This Model

Compare the modes, gas capability, display and mounting arrangement with the diving you are trained to do. Check exactly what this listing includes, particularly transmitters, interfaces and charging accessories. Configure the computer using its own manual and confirm gases, alerts, units and battery status before diving. A depth rating describes an instrument limit and does not establish a suitable dive depth.

Gear Care and Maintenance

After every dive, rinse gently in fresh water to remove salt, chlorine and grit. Let residue soften by soaking only as the model’s manual permits, and operate buttons during rinsing only where instructed. Do not direct a high-pressure hose or compressed air at sensor openings, and never probe them with a tool.

Follow the care section of the exact Shearwater model manual for any cleaner; fresh water is the baseline cleaning method. Keep pressure-sensor openings clear by gentle rinsing, without scraping or high-pressure jets. Air dry fully in the shade before storage or charging.

Inspect the strap, attachment points, display and seals before use. Store in a cool, dry place away from direct sunlight, heaters and hot cars, with the screen protected from loose equipment. Follow the manufacturer’s battery-storage and servicing instructions.

Change batteries only using the specified cell, correct replacement seals and the manual’s procedure. Work on a clean, dry instrument, inspect sealing surfaces and follow any required pressure or leak test before diving. A compatible battery kit does not authorise opening a model that is not user-serviceable.