Shearwater Tern Dive Computer
Dispatched 1 to 2 days
The Shearwater Tern is an AMOLED screen watch-style dive computer made with the sport diver in mind. Depth rated to 120m and supporting Air, Nitrox, 3-Gas Nitrox, Gauge and Freedive modes, it promises to be a reliable hit among recreational air and nitrox divers.
Shearwater Tern Dive Computer
The Shearwater Tern dive computer is a powerful, simple, reliable, and compact watch-type computer designed with the sport diver in mind.
The Tern builds upon the success of the popular Shearwater Peregrine dive computer with an appearance similar to, yet lighter and thinner than, the Shearwater Teric.
The difference between the Tern and the Shearwater Tern TX isn't just the silver bezel and button colour (as opposed to the TX's black), but also that the Tern (non-TX) isn't transmitter-capable and doesn't have a digital compass.
Neither Tern model has OC "mixed gas" technical and CCR modes as do the Shearwater Perdix 2, Teric and Petrel 3. However, both support Air, Nitrox, 3-Gas Nitrox, Gauge, and Freedive modes with 500 hours of log time, which is plenty for most divers.
The Tern & Tern TX are each depth-rated to 120 metres and tested to engineering EN standards for dive computer compliance.
High Resolution AMOLED Display
With a watch-style form factor, the 1.3” diameter AMOLED screen of the Tern provides crystal-clear visibility in various lighting conditions, making it easier than ever for divers to keep track of their crucial information.
The vibrant, best-in-class high-resolution display features Shearwater’s renowned user interface, giving divers quick access to vital data for a safer and more enjoyable diving experience.
Shearwater TERN Features
- Decompression computer
- Dive modes: Air, Nitrox, 3 Gas Nitrox, Gauge and Freedive
- Wireless charging via a cradle
- Bluetooth wireless technology
- Switchable vibration alerts
- Upgradeable firmware
- 316 Stainless bezel and buttons
- 1.3″ AMOLED colour screen & toughened glass
- Depth rated to 120m
- 500-hour dive log
- 22mm strap size with quick connect (one long and one short strap included)
What's included?
- Tern Dive Computer
- Wireless Charging Station with USB-C Cable
- Product Info Guide
- Screen Protector
- Remora Band with Quick Release System
- 1 Short Remora Band (for smaller wrists)
“The Tern is an affordable option for anyone seeking
a compact sport diving computer."
Jason Leggatt, CEO of Shearwater Research Inc.
Shearwater Watch Computers Compared
| FEATURES | TERN | TERN TX | TERIC |
| SCREEN SIZE | 1.3" AMOLED | 1.3" AMOLED | 1.39" AMOLED |
| TRANSMITTERS SUPPORTED | None | 4 | 4 |
| LENS | Toughened Glass | Toughened Glass | Sapphire |
| BATTERY | Wireless Rechargeable Li-Ion | Wireless Rechargeable Li-Ion | Wireless Rechargeable Li-Ion |
| BLUETOOTH | Yes | Yes | Yes |
| BATTERY DIVE TIME | 20 hours | 20 hours | 30 hours |
| DIGITAL COMPASS | No | Yes | Yes |
| DEPTH RATING | 120m | 120m | 200m |
| NUMBER OF GASES | 3 OC | 3 OC | 5 OC / 5 CC |
| MODES | Air, Nitrox, 3-Gas Nitrox, Gauge, Freedive | Air, Nitrox, 3-Gas Nitrox, Gauge, Freedive | OC REC, OC TEC, CC/BO, Gauge, Freedive |
| DIVE LOG HOURS | 500 | 500 | 500 |
| WEIGHT | 100g | 100g | 119g |
| ALARMS | Vibration | Vibration | Vibration / Audio |
Answers to common questions about this product, including sizing, compatibility, and usage.
Product FAQs
What are the main physical differences between the Tern, Tern TX, and Teric?
The Shearwater Teric is noticeably bulkier, built as a rugged, full-featured technical computer. It has a larger footprint (54.5mm x 53.5mm), a thickness of 17.5mm, and weighs about 120g. The Teric is built with premium materials, including a 316 stainless steel bezel and a scratch-resistant sapphire crystal window, which protects its slightly larger 1.39-inch AMOLED display.
Who are the Tern, Tern TX and Teric dive computers meant for?
• The Shearwater Tern TX is designed for the avid recreational or entry-level technical diver who loves a compact form factor but demands modern tech. It is ideal for divers who want the convenience of air integration and a digital compass without paying for technical diving features they will never use.
• The Shearwater Teric is built for technical divers, mixed-gas divers, and rebreather (CCR) users who need advanced decompression software, a deep depth rating 200 metres, and premium sapphire crystal durability. It's the ultimate tool for serious divers who want a daily-wear dive watch without compromising on any advanced capabilities.
How does the battery life compare across the three models?
By contrast, the slimmer profiles of the Tern and Tern TX mean a smaller battery footprint. Both the Tern and Tern TX provide up to 20 hours of continuous dive time at medium brightness. While slightly shorter than the Teric, this is still more than enough to cover a full weekend of heavy recreational diving on a single charge.
What are the key functional differences between the Tern and the Tern TX?
The Tern TX includes two major functional upgrades over the base Tern:
• Air Integration (AI): It can connect with up to four Swift wireless transmitters to monitor real-time cylinder pressure and calculate your true Gas Time Remaining (GTR).
• Digital Compass: It features a 3-axis, tilt-compensated digital compass for underwater navigation.
Summary: If you want tank pressure tracking on your wrist and a digital compass, you need to step up to the Tern TX.
How do the Tern and Tern TX differ from the Teric in terms of advanced diving modes?
The Teric, on the other hand, is built for the most extreme diving environments. It features a 200m depth rating and supports up to 5 open-circuit and 5 closed-circuit gases. It includes dedicated OC Technical (full Trimix) and CC/BO (Closed Circuit/Bailout) rebreather modes. It also includes full air integration and a digital compass out of the box.
If you're considering advancing to using OC or CC trimix, or eventually switching to a rebreather from Open Circuit, the Teric is the better option among watch-style Shearwater computers.
- Screen Resolution: 360 x 360
- Display Type: Full colour AMOLED
- Screen Brightness: Minimum 300 nits. Typical at 350 nits
- Display Size: 3.3cm / 1.3"
- Toughened Glass Window: Yes
- Battery Type: Internal Rechargeable Li-ion battery
- Battery Capacity (approx): 1.33 Wh
- Battery Life: up to 20 hours (medium brightness), up to 6 months (standby)
- Wireless Charging Station: Yes
- Number of Gases: 3 OC
- Depth Rating: 120m / 394ft
- Dive Log Capacity (10 second rate): 500 Hours
- Size (Dive Computer): Diameter - 50mm
- Size (Dive Computer): Thickness - 16mm
- Weight (Dive Computer): 100g
SHIPPING:
We aim to dispatch all in-stock items within 2 working days but will inform you of approximate delivery times should any item on your order be out of stock or on supplier backorder due to current manufacturing or transport delays caused by global shortages and/or impeded production.
Please refer to our Shipping Policy and Returns & Refunds Policy for detailed information on delivery terms and returns.
Our 2022 shipping rates are as follows:
• UK mainland orders £45 and over: FREE - DPD Delivery
• UK mainland orders under £45: £4.90 Fixed Rate - DPD Delivery
• Channel Islands, Isle of Man, Highlands & Northern Ireland: £14.9 Fixed Rate
• European Union: £13.90 + 5% of order value (maximum £30)
• Rest of the World: £19.50 + 8% of order value (maximum £55)
• BFPO Post Codes: £20
INTERNATIONAL EXCEPTIONS:
For international orders containing weights, cylinders (excluding suit inflation bottles) and Suex scooters please contact us in advance before placing your order.
These products are not included in our global max-capped shipping rates and are only shipped outside of UK mainland after freight cost is calculated based on total weight, dimensions of parcel, location of delivery and the courier service used. We will let you know what this cost will be before processing any order.
All cylinders we ship within and outside of UK mainland are filled and tested on site before being emptied for dispatch. Cylinders shipped outside of the UK will be empty and will also have their valves removed, requiring reassembly after you receive delivery. Twinset manifolds and bands will also be removed and dispatched together with the cylinders for safe global shipping.
RETURNS & REFUNDS
Please contact us before any return with your order number and date details. Receive our Returns Authorisation Form and instructions and enclose them with your return to expedite a refund. Detailed information is available in our Returns & Refunds Policy.
Email us at sales@dirdirect.com or call us on +44(0)1305 824 555
Note that all returned items are shipped at the customer's own risk and remain the customer's property until received by Underwater Explorers, so please ensure they are packaged well and use reliable postal services with tracking facilities. The
goods will be inspected on arrival.
Return postages are at your own cost and our outbound shipping costs (if items are sold with integrated basic shipping charges) may be deducted from any UK mainland refund unless linked to a fault/defect claim.
Please contact us with your order number and name before sending any returns to:
Underwater Explorers – Returns
Unit 1, Maritime Business Centre
Mereside, Portland
Dorset, DT5 1FD
United Kingdom
Please refer to our Shipping Policy and Returns & Refunds Policy for detailed information.
