Suunto Nautic S Dive Computer with Sapphire, Textile Strap

The Nautic runs Suunto's Buhlmann 16 GF algorithm — based on the proven Buhlmann ZHL-16C model — with adjustable Gradient Factors and GF99/Surface GF display for divers who like to fine-tune their conservatism. It supports air, nitrox, and multi-gas diving with gas switching, and even monitors tank pressure from up to five cylinders when paired with Suunto Tank PODs.

Yes to air integration — it works with Suunto Tank POD transmitters (one per cylinder, up to five, including dual-transmitter sidemount setups) to show tank pressure and real-time gas consumption on the wrist. And no subscription is required: the Nautic syncs with the free Suunto app for logs, maps, and updates. Note it pairs only with Suunto Tank PODs, not other brands' transmitters.

A dive computer tracks the actual depth and time profile you have dived and the tissue loading that follows from it, which is personal to you. A rented computer has no record of your recent diving, and swapping models each trip means relearning the display and menus when you should be focused on the dive. Owning one you know well is a genuine safety and comfort improvement.

No. A computer only tracks the profile of the diver actually wearing it, and even buddies who stay together do not follow identical depth and time profiles. Every diver needs their own computer, and passing one between divers or between dives is unsafe.

Conservatism settings make the computer's calculations more cautious, shortening allowed bottom times and adding margin beyond the base algorithm. Divers commonly add conservatism for factors such as cold, hard work, fatigue, or repetitive multi-day diving. How and when to adjust it is covered by your training and your computer's manual, so set it before you get in the water and follow what your computer tells you during the dive.

Broadly there are two types: user-replaceable batteries, often a coin cell that you or a shop swap along with resealing an o-ring, and sealed rechargeable batteries that charge from a cable or dock. Neither is universally better, as replaceable cells are convenient on remote trips while rechargeables avoid ever opening the case. Follow the manual exactly for any battery change, because an improperly seated o-ring or case is the usual cause of a flooded computer.

Yes, both change the picture, and both are governed by your training agency's guidance and your computer's instructions rather than any casual rule of thumb. Many computers have an altitude setting that must be configured before diving at elevation, and most display a no-fly or surface-interval countdown after a dive. Follow your computer and your training, and ask a dive professional or a dive-medicine specialist if you are unsure.

Rinse it in fresh water after every dive day, paying attention to the buttons and around any sensor openings where salt crystals form, and let it dry fully before storing. Keep it out of prolonged direct sun and extreme heat, and avoid pressing buttons while sand is on the case. Inspect the strap or bungee often, because a failed strap loses far more computers than a failed computer does.

A wrist computer is worn like a watch and read by raising your arm, while a console computer sits at the end of a hose with your other gauges. Air integration means the computer also displays cylinder pressure, either through a hose or from a wireless transmitter on the first stage, and often estimates remaining gas time. All of them run a decompression algorithm, so the real difference is where you read the information and how much of it you get.

The Nautic carries a 200-meter rating, which is as deep as any wrist dive computer needs to go. Paired with Buhlmann 16 GF, adjustable gradient factors, and multi-gas support with gas switching, it is built for technical diving as well as recreational.

Yes, the Nautic has an integrated LED flashlight built into the unit. On a computer with a 3.26-inch AMOLED screen and up to 120 hours of dive battery, having a light on your wrist as well makes it a genuinely self-contained instrument.

Yes. Even though the Nautic drops fitness tracking to focus entirely on diving, it keeps GPS, offline maps, tides, weather, and a compass. Tides in particular are the kind of thing you actually check on a shore dive or a boat morning.

Suunto built the Nautic around glove-friendly physical buttons, which is the right choice for a computer meant to be operated in cold water and thick gloves. The 3.26-inch AMOLED gives you a huge readout, but you drive it with buttons rather than relying on your fingers underwater.

Yes. The Nautic monitors tank pressure from up to five cylinders using Suunto Tank PODs, one per cylinder, and Suunto specifically supports dual-transmitter sidemount configurations. Multi-gas support with gas switching covers the rest of a technical setup. Note the Nautic pairs only with Suunto Tank PODs, not other brands' transmitters.

Yes. The Nautic runs Suunto's Buhlmann 16 GF algorithm with adjustable gradient factors, and it displays GF99 and Surface GF so you can see where you actually are against your chosen settings. That level of control is aimed at divers who understand gradient factors and want to tune their profiles rather than accept a fixed conservatism setting.

No. The Nautic is a dedicated dive computer, so Suunto left out optical heart rate and sports tracking to focus on diving. If you want a Suunto that does both diving and daily fitness tracking, that is the Suunto Ocean. What the Nautic keeps is the diving-adjacent stuff: GPS, offline maps, tides, weather, and a compass.