Shearwater Top Sellers

Shearwater Top Sellers — The Computers Divers Actually Buy

Shearwater has an unusual position in diving: it's a brand technical divers trusted first, and recreational divers discovered later. The result is a lineup where even the entry-level computer runs the same Bühlmann ZHL-16C decompression engine with Gradient Factors as the trimix-capable flagship, and where the display quality that made the brand's reputation in 2009 shows up across every model in the range.

These are the Shearwater products that move fastest at DiveCatalog.com — the computers, transmitters, and accessories divers consistently choose, grouped by what they're actually for. All manufactured in Richmond, British Columbia, all backed by Shearwater's free firmware update policy that adds features to computers you already own.

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Best-Selling Recreational Computers

Peregrine

The computer that brought Shearwater to recreational diving, and the one most divers land on first. A large, exceptionally readable colour display, simple two-button operation, and wireless charging — paired with the same Bühlmann ZHL-16C with Gradient Factors that runs in Shearwater's technical models. Available in Black, Adventures Light, and Adventures Dark. If you want the best display in recreational diving without paying for trimix capability you won't use, this is the answer.

Peregrine TX

The Peregrine with wireless air integration. Pairs with a Swift transmitter to show real tank pressure and gas time remaining calculated from your actual breathing rate rather than an assumed average — a meaningfully more useful number, particularly on multi-level and drift profiles.

Tern

The watch-style recreational computer, in Silver. Everything the Peregrine offers in a compact body you can wear as an everyday watch. For divers who don't want a dedicated dive instrument sitting in a gear bag between trips.

Tern TX

The Tern with transmitter support, in Black. Watch-style form factor plus wireless air integration — the most travel-friendly air-integrated setup in the Shearwater range.

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Best-Selling Advanced & Technical Computers

Teric

Consistently one of Shearwater's strongest sellers, and easy to understand why: full technical capability — trimix, closed circuit, multiple gas mixes — in a watch-style body with a full-colour AMOLED display, vibration alerts, wireless air integration, and a rechargeable battery. Available in Black, Silver, Blue, and Bronze. The computer for divers whose diving spans recreational trips and serious technical work, who don't want to own two computers.

Perdix 3 Ti

Titanium-bodied, in Silver and Black. Full technical functionality in a slimmer, lighter, more corrosion-resistant package than the Petrel. The choice for technical divers who travel and want to reduce both weight and long-term saltwater wear.

Perdix 2 Ti

The previous-generation Perdix, available in Silver, Black, Bronze, and the Journeys Edition. Still a fully capable technical computer and a genuinely strong value for divers who don't need the latest platform revision.

Petrel 3

The direct descendant of the computer that built Shearwater's technical reputation. The largest, most readable display in the lineup, a user-replaceable AA battery (no charging required on a liveaboard or expedition), and complete trimix and closed-circuit capability. Still the default recommendation from a great many technical instructors and rebreather divers.

NERD 2

The Near Eye Remote Display — a heads-up display that mounts to your regulator or rebreather loop and puts your computer in your field of vision. No wrist check, no breaking focus from the line, the reel, or the wreck. Built for rebreather divers and technical divers operating in task-loaded environments where looking away has a real cost.

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Best-Selling Consoles

Peregrine Console

The Peregrine in a console-mounted configuration, for divers who prefer their instrumentation on a hose rather than a wrist.

Peregrine TX Console

The console configuration with wireless air integration support — console format plus Swift transmitter compatibility.

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Best-Selling Transmitters

Swift Transmitter

Shearwater's wireless air-integration transmitter. Threads into a high-pressure port on your first stage and sends tank pressure directly to any compatible Shearwater computer — eliminating the hose to a mechanical SPG and enabling true gas-time-remaining calculations.

Swift GPS Transmitter

Adds GPS logging to the Swift platform, recording surface position alongside pressure data. Useful for accurate dive site logging, boat diving, and building a real record of where you've been.

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Best-Selling Accessories

The accessories that go out the door alongside the computers:

• Chargers — Peregrine Charger with Cord and Teric Charger with Cord. The item most worth owning a spare of, particularly for travel.
• Protective cases — Perdix Silicone Case (Black, White), Peregrine Silicone Case (Black, White, Grey), and the EVA Case for NERD 2.
• Battery caps — Perdix Battery Cap and Petrel Battery Cap Kit. On a user-replaceable-battery computer, a spare cap and O-ring is cheap insurance.
• Straps — Peregrine Long Strap Kit (Black, Ocean Blue, White) for wearing over a drysuit or thick exposure suit, and Remora Strap Kits in multiple colourways.
• NERD 2 Charging Clip — the dedicated charging accessory for the heads-up display.
• Avelo Mode Unlock Code — enables Avelo buoyancy system integration on compatible Shearwater computers.

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Which Shearwater Should You Buy?

If you are…	Buy this	Why
A recreational diver buying your first serious computer	Peregrine	Best display in its class; same decompression engine as the tech models
A recreational diver who wants to lose the SPG hose	Peregrine TX + Swift	Real gas time remaining from your actual breathing rate
Someone who wants a computer they'll wear daily	Tern or Tern TX	Watch-style body; TX version adds air integration
Diving both recreational and technical profiles	Teric	Full trimix and CCR capability in a wearable watch; one computer covers everything
A technical diver who travels frequently	Perdix 3 Ti	Titanium: lighter, slimmer, more corrosion-resistant
A technical diver who wants maximum readability	Petrel 3	Largest display; user-replaceable AA battery for expedition use
A rebreather or overhead-environment diver	NERD 2	Heads-up display; data stays in your field of vision

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Why Buy Shearwater from DiveCatalog.com?

• Authorized Shearwater dealer — genuine products, full manufacturer warranty
• Complete range in stock — computers, transmitters, consoles, and accessories
• Expert advice — our team can help you match a computer to your certification level and the diving you actually do
• Fast shipping — in-stock items ship within one business day
• Financing available — for premium technical computers
• Rewards program — earn points on every purchase

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Frequently Asked Questions

Is the recreational Peregrine really running the same algorithm as the technical models?

Yes. Bühlmann ZHL-16C with Gradient Factors is standard across the entire Shearwater range. The difference between the Peregrine and the Petrel 3 is gas handling, form factor, and technical features like closed-circuit support — not the quality of the decompression engine.

Do transmitters come with the computer?

No — Swift and Swift GPS transmitters are sold separately. Models with "TX" in the name (Peregrine TX, Tern TX, Peregrine TX Console) are transmitter-compatible, meaning they can pair with a Swift, but the transmitter itself is a separate purchase.

Rechargeable or user-replaceable battery — which is better?

It depends on your diving. Rechargeable models (Peregrine, Teric, Tern) are convenient for most diving and eliminate battery purchases. User-replaceable AA models (Petrel 3) are preferred for expeditions, liveaboards, and remote diving where reliable power access isn't guaranteed — you carry spares rather than needing an outlet.

Are firmware updates free?

Yes. Shearwater has a long-standing practice of delivering new features and improvements to existing computers via free firmware updates over Bluetooth, rather than requiring divers to buy new hardware to access new functionality.

What is Avelo Mode?

Avelo Mode enables integration with Avelo buoyancy systems on compatible Shearwater computers, bringing real-time buoyancy data into the dive display. It's activated via a separately purchased unlock code.

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Browse the full Shearwater top sellers above, or explore the complete Shearwater catalog. Reach out if you'd like help choosing the right computer and transmitter setup for your diving.