Shearwater
Shearwater Peregrine
$580Cheaper
Best Dive Computers · head-to-head
Shearwater Peregrine vs Garmin Descent Mk3i
A sourced, side-by-side comparison. Shearwater Peregrine is cheaper at $580. Every spec and price links to its source.
Garmin
Garmin Descent Mk3i
$1599.99
Released 2023-11
Which is better: the Shearwater Peregrine or Garmin Descent Mk3i?
On the specs we track, they're closely matched. The Shearwater Peregrine is the cheaper at $580.
As an Amazon Associate we earn from qualifying purchases. Prices verified at capture; live price may differ.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Shearwater Peregrine | Garmin Descent Mk3i |
|---|---|---|
| US price | $580 | $1599.99 |
| Brand | Shearwater | Garmin |
| Released | — | 2023-11 |
| Algorithm | Buhlmann ZHL-16C | Bühlmann ZHL-16C |
| Max depth rating (m) | 120 | 200 |
| Display type | color-lcd | amoled |
| Display size (in) | 2.2 | 1.4 |
| Air integration | No | Yes |
| Gas mixes | 3 | — |
| Dive modes | 4 | — |
| Digital compass | No | Yes |
| Battery type | rechargeable | rechargeable |
| Battery life dive hrs | 30 | 66 |
| Bluetooth | Yes | Yes |
| Weight grams | 122 | 77.8 |
Sources — Shearwater Peregrine: shearwater.com (verified 2026-07-11). Garmin Descent Mk3i: garmin.com (verified 2026-07-11).
What's the difference between the Shearwater Peregrine and Garmin Descent Mk3i?
Where the two actually differ on the specs we track (8 of 12). Matching specs are omitted.
- Algorithm: Shearwater Peregrine Buhlmann ZHL-16C vs Garmin Descent Mk3i Bühlmann ZHL-16C
- Max depth rating (m): Shearwater Peregrine 120 vs Garmin Descent Mk3i 200
- Display type: Shearwater Peregrine color-lcd vs Garmin Descent Mk3i amoled
- Display size (in): Shearwater Peregrine 2.2 vs Garmin Descent Mk3i 1.4
- Air integration: Shearwater Peregrine false vs Garmin Descent Mk3i true
- Digital compass: Shearwater Peregrine false vs Garmin Descent Mk3i true
- Battery life dive hrs: Shearwater Peregrine 30 vs Garmin Descent Mk3i 66
- Weight grams: Shearwater Peregrine 122 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.
Shearwater Peregrine
No sourced tester review yet.
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.