Oceanic

Oceanic Atom 3.1

A discontinued watch-style computer with Oceanic's Dual Algorithm and up to 3 wireless transmitters.

Cable sync only (libdivecomputer)

Third-party apps can read it, but only over a USB/serial cable, not wirelessly.

Oceanic Atom 3.1
2.4Comparison Score
$899.95
Released—
Max depth rating100m
AlgorithmOceanic Dual Algorithm (DSAT/Pelagic Z+)
Air integrationwireless
Wireless—
Display—
Batteryuser-replaceable
Digital compassNo
Gas typesair, nitrox
Gas switches3
CCR capableNo

"Gas switches" is how many different mixes this computer can be programmed to switch between mid-dive, mostly relevant for technical/staged-decompression diving. It doesn't tell you which gas types (air, nitrox, trimix) are supported. See Gas types and the product description above for that.

Pros
  • Monitors up to 3 wireless transmitters for multi-tank or multi-diver setups
  • Watch, dive computer, and digital gauge modes in one unit
  • User-replaceable CR2430 battery rated for around 300 dive hours
Cons
  • Discontinued, Oceanic/Huish no longer sells it new and has moved to the OCi as its successor
  • No Bluetooth on the base unit, relies on USB for log downloads
  • Around $900 with a transmitter, pricier than newer air-integrated computers with color displays
Diver community sentiment
Mixed opinions

On Scubaboard, divers generally speak well of the Atom 3.1's core dive-computer functions, praising its dual-algorithm support, easy twist-off battery replacement, long battery life, and strong value compared to pricier Oceanic/Aqualung models; long-time owners report solid reliability across hundreds of dives. A recurring and more serious complaint concerns the wireless air-integration transmitter: divers report inconsistent range, dropouts requiring line-of-sight and precise wrist positioning, and degraded performance as tank pressure drops below roughly 1000 psi. One poster recommended against relying on the wireless feature at all and carries a mechanical SPG as backup; an Oceanic rep responded in one thread offering to evaluate underperforming units.

Scubaboard: Atom 3.1 reliability/value discussionScubaboard: transmitter range/dropout complaintsScubaboard: Atom 3.1 vs OCi comparison

Summarized from public forum discussion (Scubaboard, Reddit, and similar), not a survey we ran ourselves. See the linked threads for the original conversations.

The Atom 3.1 is a watch-style evolution of Oceanic’s long-running Atom line, built around the company’s dual-algorithm approach and support for up to three wireless tank transmitters. It has since been discontinued in favor of the OCi, so remaining stock is mostly old dealer inventory rather than fresh production.