Shearwater Tern Dive Computer

Shearwater | SKU: 15301-10

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$595.00

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Color: Silver

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Description

The Shearwater Tern is a watch-style dive computer designed for recreational scuba diving and freediving. Its 1.3-inch (3.3 cm) full-color AMOLED display delivers a 360 x 360 pixel resolution at a typical brightness of 350 nits, and it is protected by a toughened alkali-aluminosilicate glass lens with a screen protector pre-installed. Depth rated to 120 m / 394 ft, the Tern runs the Buhlmann ZHL-16C decompression algorithm with gradient factors, offering preset low, medium, and high conservatism settings as well as user-customized gradient factors.

The Tern covers Air, Nitrox, 3 Gas Nitrox, Gauge, and Freedive modes, so a single dive computer can move between open-circuit scuba diving and breath-hold diving. An internal rechargeable lithium-ion battery provides up to 20 hours of dive time at medium brightness and around 6 months on standby, and it recharges on the included wireless inductive charging station with USB-C cable. Bluetooth connectivity handles dive log downloads and firmware updates, while switchable vibration alerts replace audible alarms for discreet notifications underwater. A 500-hour dive log at a 10-second sample rate, three customizable clock faces, and 15 configurable display colors round out the everyday-wearable design, which pairs a ballistic nylon polymer case with a stainless steel bezel and buttons on quick-release 22 mm Remora straps.

1.3-inch full-color AMOLED display, 360 x 360 resolution, typical 350 nit brightness
Buhlmann ZHL-16C decompression algorithm with gradient factors and preset or custom conservatism
Air, Nitrox, 3 Gas Nitrox, Gauge, and Freedive modes
120 m / 394 ft depth rating for recreational and light technical scuba diving
Rechargeable lithium-ion battery, up to 20 hours per charge with wireless charging station included
Bluetooth dive log downloads and upgradeable firmware
Switchable vibration alerts instead of audible alarms
Ballistic nylon polymer case with stainless steel bezel and buttons and toughened glass lens
Two 22 mm quick-release Remora bands included (one long, one short)

Features

AMOLED display 1.3-inch (3.3 cm) full-color screen with 360 x 360 resolution and 350 nit typical brightness for readability in varied conditions.
Proven algorithm Buhlmann ZHL-16C with gradient factors, including low, medium, and high presets plus user-customized gradient factors.
Five dive modes Air, Nitrox, 3 Gas Nitrox, Gauge, and Freedive modes in one watch-style dive computer.
120 m depth rating Rated to 120 m / 394 ft for recreational and light technical diving.
Rechargeable battery Internal lithium-ion battery runs up to 20 hours at medium brightness and charges wirelessly on the included USB-C charging station.
Durable construction Ballistic nylon polymer case, 316 stainless steel bezel and buttons, and toughened alkali-aluminosilicate glass lens.
Vibration alerts Switchable vibration notifications replace audible alarms.
Bluetooth connectivity Downloads the 500-hour dive log and installs firmware updates wirelessly.
Wearable design 50 mm diameter, 16 mm thick, 100 g, with 22 mm quick-release Remora bands and customizable clock faces.

Specifications

Feature	Details
Display	1.3 in (3.3 cm) full-color AMOLED, 360 x 360 pixels, 350 nits typical brightness
Lens	Toughened alkali-aluminosilicate glass with pre-installed screen protector
Depth Rating	120 m / 394 ft
Dive Modes	Air, Nitrox, 3 Gas Nitrox, Gauge, Freedive
Decompression Algorithm	Buhlmann ZHL-16C with gradient factors (preset low/medium/high or custom)
Battery	Internal rechargeable lithium-ion, 1.33 Wh; up to 20 hours dive time (medium brightness), approx. 6 months standby
Charging	Wireless inductive charging station with USB-C cable (included)
Connectivity	Bluetooth for dive log download and firmware updates
Alerts	Switchable vibration alerts (no audible alarms)
Dive Log	500 hours at 10-second sample rate
Case Materials	Ballistic nylon polymer case, stainless steel bezel and buttons
Strap	22 mm quick-release Remora bands; one long and one short included
Dimensions	50 mm diameter x 16 mm thick
Weight	100 g
Warranty	2 years

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WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

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Pay the extra

It may cost a little more but compared to the Scubapro Hydros Cargo Thigh Pocket, but it’s a night and day difference. I haven’t heard a complaint about the S-TEK.

The S-Tek is made from heavy-duty 1000D Cordura, to meet the stresses of the environment and hard use. How does this compare to Scubapro Hydros Cargo Thigh Pocket, people complaining the material ripping apart at the seams/stitching after 20 dives.

Mounting uses a stainless steel bolt snap to the waist harness D-ring and an adjustable strap for the thigh, the Hydros uses a plastic hook and strap.

The S-TEK is the largest of the three, measuring approximately 10” x 5” x 3” which is big enough to fit my iPhone 15 in the SeaLife SportDiver Ultra Underwater Housing.

I’m not sure where Scubapro all went wrong with the Hydros and Ninja pocket, but for the price of shipping, I would only purchase the S-TEK.

Affordable Fins

Purchased these from Amazon, before I learned about DiveCatalog.com, so while I paid more, they were still an affordable option while waiting on the warranty repair of my Scubapro Supernova fins. I wear a size 12 shoe (NIKE & New Balance) and the chart recommends XL which matched the Supernova XL fins, but to me, the pocket felt a bit tight, so I returned them for the 2XL. While you “can” wear them without a bootie, I wear Scubapro Go 3mm socks (3XL) and the still fit fine. The are positive buoyancy, although I don’t think as positive as the Supernova, but I feel better knowing they will float instead of falling to the ocean floor while doffing them prior to getting back on the boat.

Love the Supernova Dive Fins

My new Scubapro Supernova Fins had a small cut on the top of the boot. I asked the dive shop owner what he recommended to fix the boot. He informed me that they were made of monprene and suggested he reach out to the Scubapro Rep prior to trying to fix them with superglue.

I called Scubapro when I got back to the US and they recommended taking it to a dive shop for a warranty repair. Problem is Las Cruces is the nearest dive shop and that's an 11 hour trip. I took it to a dive shop when I flew back to Virginia, but they had to ship it to California, so the process took longer than my stay.

Being modular, I opted to buy a second set of the boot pockets so I don't have to worry about down time in the future should problems arise. Plus I can use Scubapro S-Tek Pro Blade if I want to go with a neutral or negative buoyancy fin.

Objects in your review mirror are smaller than they appear!

Scubapro Hydros Accessory Bungees are smaller than they look, but the Medium size works well for securing my action camera floatie handgrip in place. To set them up, you loop the bungee back through itself to attach to the d-ring fixation point. The center piece then slides down to clamp the accessory.

While they perform great with the grippy, foamy action camera handle, they may be less secure on heavier gear with a slick surface—like my dive light. For that setup, I’d recommend adding a second attachment point on the BCD (for example, using the metal d-rings with a snap hook on a longer lanyard) to help ensure the light doesn’t end up on the ocean floor.

A necessity for UW photography

ScubaPro Hydros Pro 2 Monorail (Hydros Pro2, Multi-Mount) is a must-have accessory for underwater photographers who want extra attachment points beyond the standard D-rings. I’ve mounted one rail on the left for my SMB, and the right side gives me a clean, stable spot for an action camera on the floatie handgrip.

The Hydros Pro 2 is an outstanding BCD—especially for anyone who has to travel for dive opportunities—but it’s noticeably light on storage and mounting options if you commonly dive with lots of add-ons. This monorail system helps bridge that gap and makes it much easier to carry and position the gear you actually want to use underwater.

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Shearwater Tern Dive Computer