Shearwater Tern TX with Swift Transmitter
Shearwater Tern TX with Swift Transmitter
Shearwater Tern TX  Dive Computer Side View
Shearwater Tern TX  Dive Computers
Shearwater Swift Transmitter with Tern TX
Shearwater Tern TX on divers wrist

Shearwater Tern TX with Swift Transmitter

Sale price£1,080.00 Regular price£1,110.00
Save £30.00

The Shearwater Tern TX is an incredible wearable sport-diving computer for those seeking a comfortable, watch-like round form. The Tern TX offers a world-class transmitter-enabled system with digital compass and Air, Nitrox, 3-Gas Nitrox, Gauge and Freedive modes, boasting a 120m depth rating.


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


Shearwater’s new Tern TX dive computer is an incredible sport-diving computer for those seeking a comfortable, lightweight round form on their wrist.

In combination with the Swift Transmitter, the Tern TX offers a world-class transmitter-enabled system complemented by a digital compass for underwater navigation at an attractive price.

This combo package consists of

  • Shearwater Tern TX Dive Computer
  • One Swift Transmitter

Like its "Silver outlined" sibling Shearwater Tern (which lacks Air Integration and digital compass) the Tern TX  builds upon the success of the popular Shearwater Peregrine dive computer with an appearance similar to yet thinner than the Shearwater Teric technical dive computer. 

What differs it from the the Teric and Shearwater Perdix 2 is that it doesn't have OC mixed gas technical and CCR modes - making it ideal for Air, Nitrox and 3-Gas Nitrox diving.

Both the Tern TX and Tern 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 TX 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 TX Dive Computer Specifications

  • Compact, stylish and lightweight, thinner than the Teric
  • Supports Air, Nitrox, 3 Gas Nitrox, Gauge, and Freedive modes
  • Is transmitter enabled to provide real-time gas pressure readings
  • Can support up to 4 transmitters 
  • Has a digital compass for underwater navigation
  • 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

“In combination with the Swift Transmitter, the Tern TX offers a world-class transmitter-enabled system at an attractive price”
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: 15313