Shearwater Tern Dive Computer Front View
Shearwater Tern Dive Computer Side View
Shearwater Tern Dive Computers
Diver looklng at Shearwater Tern on Arm

Shearwater Tern Dive Computer

Sale price£615.00

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.


Dispatched 1 to 2 days

Contact Form & Details

How can we help?

If you need to contact us for any issue or assistance, you can do so online by filling out the online Contact Form, emailing us at or calling us on +44(0)1305 824 555. If it's about a purchase you've made for us please also include your order number.

Our brick-and-mortar store Underwater Explorers based on Portland, Dorset is staffed 7 days a week, including weekends and bank holidays. As it's an active store visited by divers from around the country and world regularly, if we can't make it to the phone for any reason please leave a message and we'll get back to you asap.

Any queries are usually answered the very same day and at most within 24 hours.


Why Portland?

We’re located on the Isle of Portland (in Dorset) because Portland has been one of the most popular scuba diving locations in the United Kingdom even before we set up operations here back in the year 2000.

On one side, we’re minutes away from the sheltered waters of Portland Marina and Harbour, while on the other, it’s just a brief walk to reach our famous scuba diving destination Chesil Cove and start of the 16-mile-long Chesil Beach.  

Portland’s location makes it ideal for scuba diving, freediving, snorkelling and other surface water sports activities. 

Check out how many wrecks we have around here by clicking on Scimitar Diving's Wreck & Dive Sites chart!

Alongside dive clubs, many instructors and dive schools travel here to train and offer scuba diving certification ranging from open water diver to mixed-gas tech diving or rebreather diving levels.

Whether you’re doing a boat dive from Portland Marina or Castletown or a shore dive at Chesil Cove, Portland is well known for offering many possibilities: Reef diving to wreck diving and night diving, underwater photography or underwater videography. Anything other than cave diving is possible here.

Likely being the best-stocked diving shop in the UK, at Underwater Explorers we offer in-store scuba diving equipment advice and sales, as well as gas fills, to locals and visitors (read About Us).

But... If you’re googling “scuba diving shop near me” like some, look no further, there's DirDirect online.

Here at DirDirect, we list our cutting-edge equipment for worldwide delivery and we’ve got you covered whatever your level of diving: We’re your local dive store wherever you are in the world.

All that with over 20 years of experience especially in technical diving, from training to equipment, advice and sales.


Underwater Explorers, Unit 1, Maritime Business Centre
Mereside, Portland, Dorset, DT5 1FD


Designed with the sport diver in mind, Shearwater’s new Tern dive computer is a powerful, simple, reliable, and compact watch-type computer. You can pre-order your unit now for the January 2024 market release and be among the first to get it.

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

What differs it from the Shearwater Tern TX isn't just the silver bezel and buttons colour (as opposed to black) but that it's not transmitter capable, nor does it have a digital compass. Neither of the Tern models have OC mixed gas technical and CCR modes as do the Shearwater Perdix 2, Teric and Petrel 3.

Both the Tern & Tern TX are depth rated to 120 metres and tested to engineering EN standards for dive computer compliance. They both support Air, Nitrox, 3 Gas Nitrox, Gauge, and Freedive modes and can log 500 hours of dives with a battery life of 20 hours with dive mode on. 

Shearwater Tern Computers Reviewed

Tern AMOLED screen

With a watch-style form factor, the 1.3” diameter AMOLED screen 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 offers Shearwater’s renowned user interface that provides divers with at-a-glance access to vital data, ensuring a safer and more enjoyable diving experience.

Shearwater TERN Dive Computer Specifications

  • Compact, stylish and lightweight, thinner than the Teric
  • Support Air, Nitrox, 3 Gas Nitrox, Gauge, and Freedive modes
  • Has a battery life with dive mode on for 20 hours 
  • Is charged wirelessly via cradle and supports quick charge
  • Has Bluetooth
  • Has haptic alarms
  • Has a vibrant clear 1.3″ Amoled colour screens & toughened glass
  • Is depth rated to 120m
  • Has 500 hours dive log
  • Is available with the new Shearwater Remora quick-connect straps

“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

SCREEN SIZE 1.3" Amoled 1.3" Amoled 1.39" Amoled
LENS Toughened Glass Toughened Glass Sapphire
BATTERY Wireless Rechargeable Li-Ion Wireless Rechargeable Li-Ion Wireless Rechargeable Li-Ion
BATTERY DIVE TIME 20 hours 20 hours 30 hours
DEPTH RATING 120m 120m 200m
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

SKU: 15301