Shearwater Research

Shearwater Tern (left) and Tern TX

Shearwater issues important notice for all Tern and Tern TX users.


The issue is that if using Air mode and the Nitrox mode gas has been programmed to something other than air (21%), then that programmed gas is used while diving. This could result in a less conservative dive plan than is appropriate.

Prevention: If using firmware v34, do not use single gas Air Mode. Instead, use the single gas Nitrox Mode with 21% gas programmed.

Updated firmware for Tern and Tern TX will be released Monday April 14, 2025. Please check our website for the newest version.

When you buy the Tern TX, you get two wristbands, a wireless charger and a good box to store it in.

Shearwater Tern TX Review

It has five different modes/dive methods plus an everyday clock:

• Air: For regular sport diving with air.
• Nitrox: For regular sport diving with a nitrox mix.
• 3 Gas Nitrox: Decompression diving with three different gas mixes of air and nitrox.
• Gauge: A bottom timer that only records time and depth.
• Freediving: For snorkelling and freediving.

The computer is approved for depths up to 120m, which should be sufficient.

Introducing the Adventures Edition of the Peregrine Dive Computer

Shearwater Research Inc., a global leader in dive technology, is thrilled to announce the launch of the Adventures Edition of the popular Peregrine Dive Computer, featuring two stunning new variants.

The contrasting Light and Dark Edition options draw inspiration from the exploration of vivid and diverse underwater worlds while embodying the spirit of adventure that defines the Shearwater brand.

Shearwater Research Appoints New CEO and VP of Sales & Marketing

Current CEO Jim Hartt will be retiring on July 31, 2023. “Lynn and I would like to thank Jim for guiding Shearwater through the eventful past four years and wish him well in his retirement” said Shearwater’s founder and Board member Bruce Partridge.

“We are also confident and excited about the company’s continued success under Jason’s leadership”.

Jason Leggatt brings over 22 years of experience in the marine industry, having previously served as the President of Mustang Survival, a leading personal protective equipment company.

Shearwater Research Inc.

Founded in 2004, Shearwater Research designs and manufactures computers for all types of divers demanding more from themselves and their diving experience. Whether you're an air, nitrox, multi gas trimix or closed circuit rebreather diver, Shearwater offers products which are powerful, simple, and reliable. 

We are a company of passionate divers driven to design and build our dive computers in Richmond, British Columbia, Canada. Our computers are used by sport & technical divers, explorers, rescuers, and the military all over the world.