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Mares Sirius Review: High-Tech Meets Elegant Design


Mares Sirius
Mares Sirius

Mark Evans: Mares have had wristwatch-style dive computers in their line up before, and while they were more than capable units, they just didn’t set the world alight the same way that products such as the Shearwater Research Teric or the Garmin MK2i did on their release.

Mares Sirius
Mares Sirius

Design and Comfort

That all changes with their latest watch-style dive computer, the Sirius, which Mares says ‘perfectly combines technology and elegance in a top-of-therange, intuitive dive computer for both recreational and extended range divers’.

The Sirius is certainly a good-looking unit, especially in the black/silver version we had on test. The MIP-colour, high-resolution screen is very easy to read, and we liked how in watch mode you can cycle through three different ‘faces’ and numerous colourways at the push of a button.

It is easy to see why Mares made the above statement.

The computer is rechargeable

The computer is rechargeable

Display and User Interface

It is powered by the tried-and-tested ZH-L16C algorithm with gradient factors and predictive multigas, and offers hoseless tank data integration via the LED Tank Module 2.0 (an optional extra which can be purchased separately).

For the recreational diver, the Sirius can just display all of the salient points you need, such as dive time, max depth, current depth, NDL remaining, but then extended range and tech divers can bolster this information by adding up to five nitrox and trimix mixes.

The MIP-colour, high-resolution screen is very easy to read
The MIP-colour, high-resolution screen is very easy to read

It will handle nitrox from 21-99%, and can deal with hypoxic and normoxic trimix, and the maximum displayed depth of 150m is more than enough for most technical divers.

Dive Features and Customization

The dive display is very intuitive – it can be personalised in multiple colour variants, and alarms for deco stops, fast ascents, etc, are extremely vibrant – let’s put it this way, you are not going to miss them!

Cycling through the menu is straightforward, using the four push buttons, and around the face and on the edge of the body, it reminds you the function(s) of each button.

I was able to bounce around the menu with no issues after a few minutes of ‘playing’, but the handy quick-start sheet makes it very simple, showing what is accessed with a quick press, and what with a long press.

Ease of Use

The chunky silicone strap is very comfortable on a bare wrist when used as a watch, but it is also long enough for a thin wetsuit. If you are using a thicker wetsuit or a drysuit, it also comes with an extended strap. Swapping straps is a doddle as it has a quickrelease mechanism.

Recharging and Battery Life

The computer is rechargeable, and charging it is a piece of cake – no faffing around with clips, or having to get it sat ‘just right’ in a cradle.

It comes in a neat zippered, padded case.
It comes in a neat zippered, padded case.

No, here you just sit it on the charging pad and that’s it. Straightforward and easy.

You get 30 hours dive time out of a charge, which is more than sufficient for a week of diving, but as charging is so easy, we just chucked it on the pad half-way through our liveaboard week (we were doing up to five dives a day) to ensure we never ran low on power.

Mares Sirius has a range of accessories
Mares Sirius has a range of accessories

The Sirius also has a full-tilt digital compass with bearing memory, and Bluetooth connectivity means you can pair it up to your smartphone with ease for downloading dive data, etc.

The Sirius is available in two colour versions, black or black/silver, and has a range of accessories to fully personalize to your own tastes, including straps in colourways such as aqua, red, and blue. It comes in a neat zippered, padded case.

This article was originally published in Scuba Diver UK #76.

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Picture of Mark Evans
Mark Evans
Scuba Diver's Editorial Director Mark Evans has been in the diving industry for nearly 25 years, and has been diving since he was just 12 years old. nearly 40-odd years later and he is still addicted to the underwater world.
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