A watch you can wear between dives
Compare the Mk3i sizes and Tern TX. Try the display at your normal reading distance with your mask on. Case size and screen area are different measurements.
FIND THE COMPUTER THAT FITS YOUR DIVING
Compare Dive Computers
Garmin, Shearwater and Oceanic—compare the display, format and features that matter before choosing your next setup.
Get personal equipment adviceDive computer comparison at a glance
Start with readability, your training and compatible equipment. Transmitters are separate unless the selected bundle explicitly includes them. Swipe the table sideways on a smaller screen.
| Computer | Display / format | Rating | Air integration | Battery style | Key distinction |
|---|---|---|---|---|---|
| Garmin Mk3i 43 mm | 1.2-inch AMOLED watch | 200 m | Up to 8 T2 transmitters (sold separately) | Rechargeable | Smaller watch; recreational and technical modes |
| Garmin Mk3i 51 mm | 1.4-inch AMOLED watch | 200 m | Up to 8 T2 transmitters (sold separately) | Rechargeable | Larger watch; built-in flashlight |
| Garmin X10 | 2.1-inch backlit display | 100 m | No air integration | Rechargeable | Scuba, apnea and gauge essentials |
| Garmin X30 | 2.4-inch color LCD | 100 m | No | Rechargeable | Physical buttons; multi-gas/trimix |
| Garmin X50i | 3-inch color touchscreen | 200 m | Up to 8 T2 transmitters (sold separately) | Rechargeable | Large display; technical/CCR platform |
| Shearwater Perdix 3 | 2.4-inch AMOLED | 260 m | Up to 4 transmitters | Replaceable AA | Technical trimix and fixed-PPO2 CC/BO |
| Shearwater Peregrine TX | 2.2-inch LCD | 120 m | Up to 4 transmitters | Wireless rechargeable | Recreational nitrox; no trimix/CCR |
| Shearwater Tern TX | 1.3-inch AMOLED watch | 120 m | Up to 4 transmitters | Wireless rechargeable | Compact recreational and freedive format |
| Oceanic O.i | 2.4-inch TFT wrist | 100 m | Up to 3 transmitters | Induction rechargeable | NavDial, scuba/gauge, surface GPS |
| Oceanic ProPlus 4.0 | Large-digit console | 100 m | Hose-connected | Replaceable CR2 | Air/nitrox/gauge; two-gas capability |
Depth ratings are equipment specifications, not recommended dive depths. Required firmware, supported accessories and individual configurations can change. Review the linked manufacturer specifications in each brand guide before ordering.
Which direction fits you?
A dedicated, generous display
Compare X10, X30, X50i, Perdix 3, Peregrine TX and O.i. Look at how your preferred screen layout presents depth, time, gas and alerts.
Start here
Explore ShearwaterA familiar console format
The ProPlus 4.0 combines hose-connected pressure information with a large-digit display. Confirm the compass and connection options in the exact package.
Start here
Explore OceanicAccessories are part of the decision
| Accessory | Purpose | Check before buying |
|---|---|---|
| Garmin Descent T2 | Tank pressure and SubWave communication with compatible Descent equipment | Computer, firmware, regulator connection and required network equipment |
| Garmin Descent S1 buoy | Topside monitoring and preset messaging for a compatible Garmin dive network | Compatible computers/T2 units, surface crew procedures and operating conditions |
| Shearwater Swift GPS | Wireless pressure plus surface entry/exit location logging | Compatible air-integrated computer, firmware and Dive Shearwater app |
Five questions that narrow the choice
- What dives are you trained for? Match modes to your actual qualifications and future training plans.
- What can you read easily? Compare both the screen and the size of the information it displays.
- Do you need air integration? Check transmitter compatibility and the complete system cost.
- How do you prefer to manage power? Compare rechargeable systems with replaceable batteries.
- What equipment do you already own? Bring model names so we can check compatibility.
Compare the full details
Our Garmin guide, Shearwater guide and Oceanic guide include product images, model-specific advantages and official specification links. Ask Stuart Scuba about current stock, pricing and packages.
Choose your next dive computer with Stuart Scuba
Tell us your certification, the dives you enjoy, your wrist size and whether you already own a transmitter. We can help you compare the complete setup before you buy. Serving divers in Stuart, Jupiter, West Palm Beach and beyond.
Call 772-600-8288Ask an equipment questionEmail info@stuartscuba.com · Ask about current pricing, availability and compatible bundles.
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Specifications checked November 12, 2026. Features can depend on firmware, accessories and region. Depth ratings describe equipment limits, not a diver’s training or a recommended dive depth. Read the current manufacturer manual and practice operating your computer before diving.
