Dive computers for air, nitrox and navigation help divers monitor depth and time, track decompression information and, on some models, follow a route underwater. The right choice depends on which functions you need: basic dive monitoring, nitrox support, navigation tools, or a combination.
These capabilities are not interchangeable: a computer’s display, controls and available features shape how easily you can use it underwater. This guide explores what to look for in dive computers, from air and nitrox settings to navigation, so you can compare options with your diving needs in mind.
| Feature | What it does | What to verify |
|---|---|---|
| Air integration | Displays transmitter-fed tank pressure | Compatible first-stage transmitter; may be separate |
| Remaining-air estimate | May estimate air from breathing rate | Whether the exact model includes it |
| Nitrox support | Allows Nitrox gas configuration | Exact gas modes listed for the model |
| Tilt-compensated compass | Provides an underwater navigation tool | Compass availability and model specification |
| Suunto Ocean All Black | Lists air, Nitrox and dive alarms | 60 m maximum operating depth under EN 13319 |
- 60 m Suunto Ocean All Black maximum operating depth listed under EN 13319
- EN 13319 Standard named for the Suunto Ocean All Black maximum operating depth
- 1 Regulator stage identified as the transmitter mounting point: the first stage
What does air integration add to a dive computer?
Air integration adds tank-pressure readings to a dive computer, displaying them alongside depth, dive time and decompression information. A transmitter mounted on the regulator’s first stage sends the pressure information wirelessly, so the diver can check it on the computer rather than looking at a separate pressure gauge.
Transmitter compatibility
The transmitter is an additional component and may need to be bought separately. Before purchasing one, check that it is compatible with the exact dive-computer model; wireless transmission alone does not guarantee that two devices will work together.
- Computer and transmitter: Verify compatibility for the specific models you plan to use.
- Purchase: Check whether the transmitter is included or sold separately.
Pressure display versus air-time estimates
Tank pressure is the information air integration supplies; some advanced computers also use breathing rate to estimate remaining air, but that estimate is a separate feature and is not universal. Low-air alerts are likewise available on some models, not all, so check the computer’s stated functions rather than assuming that pressure monitoring includes either feature.
What does Nitrox support mean in a dive computer?
Check the listed gas modes.
Nitrox support means a dive computer can be set to calculate a dive using a Nitrox mix rather than air. The Suunto Ocean All Black lists “Nitrox (and air)” among its basic functions, alongside a maximum operating depth of 60 m under EN 13319.
- Air and Nitrox: The Suunto Ocean All Black explicitly lists both; check that the particular model supports the mix you plan to use.
- Multiple gases: Support varies by model. Confirm the listed gas options and operating modes individually; air, Nitrox, trimix and CCR are distinct capabilities, not interchangeable labels.
A computer’s gas setting does not identify the gas in a cylinder. Before diving, verify the cylinder’s actual mix and set the computer to match it; selecting Nitrox in the device is not a substitute for checking the gas itself.
Which navigation features are useful underwater?
A dive computer’s useful navigation features include a tilt-compensated compass and menus that make key settings and information easy to find. These functions are separate from pressure monitoring and gas support: a compass aids orientation, while air integration displays tank pressure and Nitrox support handles a breathing-gas mix.
- Compass: Check whether the model specifically lists a tilt-compensated compass; do not assume that pressure monitoring or support for air and Nitrox means it has one.
- Menus: Consider how clearly the device organizes settings and dive information, especially when you need to locate them underwater.
- Readability and controls: Assess the compass display and the controls in the conditions in which you plan to dive. Navigation tools and their usability are not identical across computers.
Check the specifications, not just the feature list
The Suunto Ocean All Black specifications supplied here list dive functions including Nitrox and air, dive time, surface time, safety stop and a maximum operating depth of 60 m under EN 13319. They do not establish that this model has a tilt-compensated compass, so that feature should not be inferred from its listed dive functions.
What basic dive functions can one computer combine?
A named specification example
The Suunto Ocean All Black combines dive-time, surface-time, no-fly-time, safety-stop and ascent-time displays with freediving, depth notification, and depth and dive-time alarms. Its listed maximum operating depth is 60 m under EN 13319, and its basic specification includes both air and Nitrox.
- Time information: dive time, surface time, no-fly time and ascent time.
- Stops and alerts: a safety-stop function, depth notification, depth alarm and dive-time alarm.
- Modes and limit: freediving is listed, alongside a maximum operating depth of 60 m under EN 13319.
The Suunto Ocean All Black’s specification is a concrete example, not a checklist that applies to every dive computer. Air integration, for instance, involves a wireless transmitter for tank-pressure readings; that feature is distinct from the time, alarm and freediving functions listed for this model, so check each computer’s own specifications rather than assuming it includes a feature because dive computers can offer it.
When can air integration or a feature list mislead?
Air integration can mislead when a feature label is mistaken for a complete system: the computer needs a compatible transmitter fitted to the regulator’s first stage to display tank pressure. Check that the named model supports the transmitter you plan to use; the word “air-integrated” alone does not confirm that the transmitter is included.
Check the full system, not the feature label.
Compare the cost of the computer and transmitter together, because the transmitter may be a separate purchase. Also check which air-integration functions the specific model provides: tank-pressure monitoring does not automatically mean it calculates remaining air from breathing rate or gives low-air alerts.
- Transmitter: Confirm compatibility with the computer and whether it is included or sold separately.
- Air functions: Verify whether the model offers a breathing-rate-based remaining-air estimate and low-air alerts; treat these as model-specific advanced features.
- Other capabilities: Check the specification for the named model before assuming it supports trimix, CCR or a compass. Suunto Ocean’s listed basic specifications include air and Nitrox, but that alone does not establish trimix, CCR or compass capability.
How should a recreational diver choose among these features?
Choose a dive computer by matching its listed functions to the information you want during a dive, then check each feature in the model’s specifications. The Suunto Ocean All Black lists air and Nitrox, safety-stop timing and ascent time; its stated maximum operating depth is 60 m under EN 13319.
- Gas and dive timing: The Suunto Ocean All Black specifies air and Nitrox, plus safety-stop timing and ascent time. Check that a computer explicitly supports the gas you plan to use.
- Tank pressure: Air integration displays transmitter-fed pressure on the computer. Choose it if that wrist display is worth adding a compatible transmitter to the first stage; the transmitter is a separate component.
- Air estimates and alerts: Remaining-air estimates based on breathing rate and automatic low-air alerts are model-specific extras. Confirm each feature in the individual model’s specifications rather than assuming it comes with air integration.
- Navigation: Check the compass type and menu design separately from gas and pressure functions. A tilt-compensated compass is a distinct navigation feature, not proof of any particular air-integration capability.
Keeping these checks separate helps avoid paying for transmitter-based pressure display when your priority is Nitrox support or navigation. Compare the exact model specifications, including the 60 m EN 13319 limit listed for the Suunto Ocean All Black, against your intended use.
Frequently asked questions
Does an air-integrated dive computer need a transmitter?
Does every air-integrated computer estimate remaining dive time?
Can a Nitrox-capable computer also be used for trimix?
What is the stated maximum operating depth of the Suunto Ocean All Black?
Key takeaways
- Air integration requires a compatible transmitter on the regulator’s first stage.
- The transmitter may be sold separately; check total system cost and compatibility.
- Suunto Ocean All Black lists air, Nitrox and a 60 m maximum operating depth under EN 13319.
- Remaining-air estimates and low-air alerts are model-specific, not universal.
- Verify compass, gas-mode and menu details against the exact model specification.
Sources
- divingsquad.com — “15 BEST Dive Computer Reviews (2026 EDITION)”
- divein.com — “Best Air-Integrated Dive Computers – divein”
- Scuba Diving — “Best New Dive Computers Reviewed”
- How to Choose the Right One — “Dive Computer Buying Guide”
- us.suunto.com — “Suunto Ocean All Black – Dive Computer & Sports Watch”
