Suunto
Suunto Ocean
$799Cheaper
Best Dive Computers · head-to-head
Suunto Ocean vs Garmin Descent Mk3i
A sourced, side-by-side comparison. Suunto Ocean is cheaper at $799. Every spec and price links to its source.
Garmin
Garmin Descent Mk3i
$1599.99
Released 2023-11
Which is better: the Suunto Ocean or Garmin Descent Mk3i?
On the specs we track, they're closely matched. The Suunto Ocean is the cheaper at $799.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Suunto Ocean | Garmin Descent Mk3i |
|---|---|---|
| US price | $799 | $1599.99 |
| Brand | Suunto | Garmin |
| Released | — | 2023-11 |
| Algorithm | Suunto Bühlmann 16 GF | Bühlmann ZHL-16C |
| Max depth rating (m) | 60 | 200 |
| Display type | amoled | amoled |
| Display size (in) | 1.43 | 1.4 |
| Air integration | Yes | Yes |
| Gas mixes | 5 | — |
| Dive modes | — | — |
| Digital compass | Yes | Yes |
| Battery type | rechargeable | rechargeable |
| Battery life dive hrs | 40 | 66 |
| Bluetooth | Yes | Yes |
| Weight grams | 99 | 77.8 |
Sources — Suunto Ocean: us.suunto.com (verified 2026-07-11). Garmin Descent Mk3i: garmin.com (verified 2026-07-11).
What's the difference between the Suunto Ocean and Garmin Descent Mk3i?
Where the two actually differ on the specs we track (5 of 12). Matching specs are omitted.
- Algorithm: Suunto Ocean Suunto Bühlmann 16 GF vs Garmin Descent Mk3i Bühlmann ZHL-16C
- Max depth rating (m): Suunto Ocean 60 vs Garmin Descent Mk3i 200
- Display size (in): Suunto Ocean 1.43 vs Garmin Descent Mk3i 1.4
- Battery life dive hrs: Suunto Ocean 40 vs Garmin Descent Mk3i 66
- Weight grams: Suunto Ocean 99 vs Garmin Descent Mk3i 77.8
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Suunto Ocean
Only one whitelisted tester, TechRadar, ran a genuine hands-on review of the exact Suunto Ocean; dive-specialist outlets like DIVE Magazine and Wareable fall outside the whitelist. TechRadar's Craig Hale dove with it repeatedly and calls it a vast improvement over the D5, praising the display and value while flagging the non-titanium case and USB-A charging. (1 sourced review, 1 lab-tested.)
Praised: Crisp, clear high-resolution AMOLED display, readable underwater; User-friendly interface, easy to learn within minutes; Strong value for a watch that doubles as dive computer and sports watch.
Flagged: Stainless steel case less ding-resistant than titanium rivals like the Garmin Fenix 8; Ships with an outdated USB-A charger instead of USB-C; Lacks advanced tech-diving support (rebreathers, trimix).
Garmin Descent Mk3i
Only one whitelisted hands-on tester (TechRadar) reviewed the exact Garmin Descent Mk3i, scoring it 5/5 overall. It praised battery life, comprehensive dive features and durability, but flagged the high four-figure price (plus paid T2 transmitter) and a relatively clunky UI. All three quotes were verified as literal substrings of the fetched article. (1 sourced review.)
Praised: Impressive battery life even with all sensors active; Comprehensive dive features: SubWave diver-to-diver comms, multi-gas/trimix, 200m rating; Rugged, durable titanium case with scratch-resistant sapphire display.
Flagged: More expensive than rivals; four-figure price (plus paid T2 transmitter); Relatively clunky UI versus native Apple/Google watches; Five physical buttons have a learning curve.