Shearwater Tern TX + Swift GPS Bundle

Shearwater Tern TX

Our most compact dive computer redefines diving convenience and versatility for sport divers. Incorporating a compact design with advanced features, the Tern TX includes both optional wireless air integration with up to 4 tanks and a digital compass. Its enhanced visibility, user-friendly interface, and compatibility with multiple diving modes, make it an essential tool for divers seeking reliability and ease of use.

Note: Production of the Limited Edition Tern TX has concluded. Availability is now limited to existing dealer inventory. Please contact your local authorized Shearwater dealer to check current stock and availability.

Modes

• Air
• Nitrox
• 3 Gas Nitrox
• Gauge
• Freediving
• Avelo (Unlock Code Required)

Features

• Decompression computer
• Air integrated
• Connects up to 4 transmitters
• 3 axis, tilt compensated, digital compass
• Bluetooth wireless technology
• Switchable vibration alerts
• Upgradeable firmware
• 316 Stainless bezel and buttons
• 22mm strap size with quick connect (one long and one short strap included)
• Ballistic nylon polymer case

Technical Specs

• 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

What’s on the box?

• Tern TX 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

Warranty

2 Year Warranty

In addition to a sleek design and robust performance, the Tern also includes high-end extras like wireless inductive charging and quick-release straps. A favorite of testers, offering excellent performance, the Tern and Tern TX are our Testers Choice for recreational computers.

Tern & Tern TX Named ScubaLab's Testers Choice

January 29, 2025

ScubaLab has named the Shearwater Tern and Tern TX the 2024 Testers Choice for recreational dive computers. Seven new dive computers were tested in a head to head evaluation. View the video below or keep reading to see the results.

ScubaLab tested the computers at the University of Southern California's hyperbaric chamber on Catalina Island, where they put them through a series of simulated dives alongside other computers to gauge the performance of their decompression algorithm. They also tested computers in the field at Blue Grotto Dive Resort in Central Florida.

ScubaLab evaluated how easy the computers were to set up, how well they could see their screens in different conditions, and how well they presented data during the dives. The compact watch sized Tern scored excellent almost across the board. Test divers loved it's wrist friendly ergonomics and brilliant high resolution color display. It is easy to pick up the ins and outs of the four button operation. Testers especially liked the one touch brightness adjustment. The dive display has a clean appearance and logical organization, with the option to customize data fields, change color schemes, and activate a big numbers mode.

The Tern has nitrox and freediving support by default. The Tern TX adds wireless air integration and a digital compass, providing everything a recreational diver could need. The compass can be viewed via a dedicated screen or a minimalist overlay. There's a wealth of secondary data that's easy to cycle through quickly. Test divers also love the attention grabbing vibration alerts, especially at safety stops. In addition to a sleek design and robust performance, the Tern also includes high end extras like wireless inductive charging and quick release straps. A favorite of test divers offering excellent performance, the Tern and Tern TX are ScubaLab's 2024 testers choice for recreational dive computers.

Courtesy Scuba Diving Magazine

Swift GPS Transmitter

Every Shearwater air integrated dive computer can lock in your dive site location coordinates with the Swift GPS. Get more than the benefits of air integration when you capture your dive's entry and exit points, and add maps to your Dive Shearwater log.

Receive real time gas pressure data and benefit from accurate gas time remaining calculations for extended dive time. Easily view all dive metrics in your computer display, maximizing your adventure and enjoyment underwater.

When the dive log is transferred to Dive Shearwater, the log will display: 

• Your dive location on a map 
• A location name (if available) 
• Entry and exit coordinates 
• A world view of all your dive log locations 
• If a user has multiple transmitters, only 1 needs to be GPS.  

Plus, all standard features of SWIFT:

• Advanced collision avoidance system ensures reliability using multiple transmitters
• Randomized transmit interval allows for reliable simultaneous use of multiple Swift transmitters
• LED status indicator
• Easy ‘no tools’ installation and removal on divers first stage
• Compatible with all existing air integrated Shearwater dive computers

Technical Specs

• Depth limit: 200 m
• Operating temperature range +4°C to +34°C
• Short-term (hours) temperature range: -10°C to +50°C
• Long-term Storage temperature Range: +5°C to +20°C
• Pressure port: 7/16" -20UNF
• Rated air pressure: 300 bar / 4350 psi
• Pressure reporting resolution: 0.14 bar / 2 psi
• Pressure reporting interval: 4.8 - 5.2 seconds
• HP port proof pressure: 450 bar / 6525 psi
• Accuracy: 5% full scale
• Zero offset: <3.5 bar / 50 psi
• Activation pressure: 7 bar / 100 psi
• De-activation pressure: 3.5 bar / 50 psi
• Cover screws: 1.5mm hex 316SS
• Body o-ring: 24x1.5mm
• HP port o-ring: AS568-904 75A Viton

Dimensions

• Size 76mm (L) x 34mm (D)
• Weight 135g

Battery

• Battery type: CR2 3V Lithium (User replaceable)
• Ships with and recommended battery type: Panasonic CR2 Industrial
  Lithium
• Battery Capacity (approx): 2.55 Wh
• Battery life: Up to 100 dive hours (100 one-hour dives, with 20 minutes GNSS on-time before and after each dive) or 2 year storage time

GNSS

• GNSS Constellations: GPS L1C/A, Galileo E1B/C, BeiDou B1l
• Location resolution: 2 m