Shearwater Teric Review: A Dive Computer You'll Actually Wear

I've dived a Perdix for years, and it never leaves the gear bag between dives. It's a tool — capable, honest, ugly in a way I respect. The Teric is the computer I actually wear, off the boat and on. I bought mine to stop carrying two devices: a dive computer for the water and a watch for everything else. After a full season of weekend dives out of Jupiter and Riviera Beach — Blue Heron Bridge muck crawls, the ledges off Jupiter, the occasional deeper wreck — here's where it earned its place and where it didn't.

What it is

The Teric is Shearwater's wrist-watch dive computer. It runs the same decompression core as the Perdix line — Bühlmann ZHL-16C with Gradient Factors — and packs it into a round case roughly the size of a chunky dive watch. The display is a bright AMOLED color screen, and unlike most computers in this class it's a watch you can wear to dinner without looking like you wandered out of a tech shop.

It covers the full range of modes: air, nitrox, trimix, gauge, and a closed-circuit mode for rebreather divers. It does air integration with Bluetooth transmitters, so you can read tank pressure and remaining gas time on the wrist instead of reaching for an SPG. There's a digital compass, vibration and audible alerts, and it charges on an inductive pad rather than through a port. In other words, the same engine as a Perdix, in a body you'll forget you're wearing.

What it does well

The first thing that matters underwater is that I trust the numbers. It's running Shearwater's algorithm with Gradient Factors I set myself, the displays are clean, and the data I want — depth, time, no-stop limit or ceiling, gas — is where I expect it. There's no menu archaeology to find ascent information. For a working recreational and light-tech diver, that's most of the job done.

The screen is genuinely good. The AMOLED is bright and high-contrast, and in the green murk of a Blue Heron Bridge afternoon I can read it at a glance. It's smaller than a Perdix screen — I'll come back to that — but the contrast does a lot of the work, and on a clear ledge dive off Jupiter it's never been a problem.

The alerts get noticed. The vibration motor is the feature I didn't know I needed. On a busy dive, watching critters or sorting out a buddy, an audible beep alone can slip past you. A buzz on the wrist doesn't. When I creep past a planned depth or hit a stop, I feel it. That's a real safety margin, not a spec-sheet bullet.

It's a watch. This is the whole reason I bought it, and it delivers exactly as promised. I wear it daily. It tells the time, it survives a normal week, and when I throw the gear in the truck on a Saturday morning I'm not hunting for a separate dive computer — it's already on my wrist. For anyone who hates owning a single-purpose device that lives in a bag, that convenience is the entire pitch and it's real.

Air integration is clean. Paired with a transmitter, gas time on the wrist is a quiet luxury. I still carry a mechanical SPG as backup — I'd never run a transmitter as my only source of tank pressure — but having the number on the display next to my deco data tightens up how I run a dive.

Where it falls short

The honest tradeoffs are the ones built into the form factor, and you should go in knowing them.

The screen is smaller. It has to be — it's a watch. For my eyes it's been fine, but if you dive with older eyes, or in low viz, or you simply like big numbers you can read without focusing, the Perdix's larger display is easier to live with. This isn't a flaw so much as physics: you can't have a wrist-watch profile and a tech-computer screen at the same time.

The battery is rechargeable, not field-swappable. The Teric charges inductively on a pad. That's tidy at home, but it means there's no popping in a fresh cell on a boat or at a remote site. If you forget to charge it, or you're doing a multi-day trip far from an outlet, that's a planning problem you don't have with the Perdix. I've never been caught out because I charge it the night before every dive day — but "remember to charge it" is now a step in my pre-dive routine, and it wasn't before. For expedition or liveaboard diving where power is uncertain, this is a legitimate strike against it.

You will scratch it. Because you wear it everywhere, it picks up the small dings of daily life that a bag-dwelling Perdix never sees. Mine has a couple of marks on the bezel from ordinary wear. It's held up fine, but a watch you live in lives a harder cosmetic life than a tool you only deploy.

The price. It sits at the premium end — roughly a four-figure outlay at full retail, in the same neighborhood as a Perdix 2 rather than below it. You're not paying less for the smaller package; you're paying for the watch form and the AMOLED screen. That's a fair deal if wearability is what you want, but nobody should pretend the Teric is the budget option.

Compared to the Perdix 2

This is the comparison that actually matters, because the two computers share a brain and split on body.

The Perdix 2 gives you a big, easy-to-read screen and a user-replaceable battery. You drop in a fresh cell in the field — no charger, no outlet, no planning around power. It's larger and more rugged, the kind of computer you bolt to your wrist for a serious dive and don't think about. For technical diving, expeditions, or anyone who values being able to swap a battery on the boat, the Perdix is the more sensible tool. The bigger screen is genuinely easier to read under stress and at depth.

The Teric runs the same algorithm and the same Gradient Factors, so underwater the decompression behavior is effectively the same. What you trade is screen size and the field-swappable battery. What you gain is a computer that's a watch — something you'll wear to work, to dinner, and to the boat without a second device. The vibration alerts and the AMOLED screen are nice, but the real dividing line is simple: do you want a tool you store, or a watch you wear?

For my diving — recreational and light tech, weekends out of Jupiter, never more than a tank or two from a wall socket — the Teric's tradeoffs cost me almost nothing and the everyday wearability is worth a lot. If I were doing serious overhead or trimix work, or week-long trips off-grid, I'd put the Perdix 2 on my wrist instead and not look back. They're the same computer with different priorities, and the right one depends entirely on how and where you dive.

Who should buy this

Buy the Teric if you want one device that's both your dive computer and your daily watch, your diving lives within reach of a charger, and you value a watch you'll actually wear over the biggest possible screen. For the recreational-to-light-tech diver doing the kind of South Florida weekends I do — bridge dives, ledges, the odd wreck — it's an easy recommendation. It does everything a Perdix does in the water, and it earns its keep the other six days of the week.

Skip it if you do serious technical, expedition, or off-grid diving where a field-replaceable battery and the largest, most readable screen are non-negotiable — get the Perdix 2 and spend the difference on the dive. And skip it if a four-figure price tag for a wrist computer makes you wince; the value is real, but it isn't cheap.

I bought mine to stop owning two devices, and it solved that completely. A year in, it's still on my wrist as I write this, and it'll be on my wrist on the boat Saturday. That's the highest praise I can give a piece of gear: I stopped thinking about it.