Suunto Nautic - will it be supported?

[Dietmar Flubacher]

Dear all,

my EON core just crashed and cannot be repaired. I am thinking about getting a Suunto Nautic. Are you planning to support it and if so, any idea when this will happen? Please don't misunderstand, just asking - I am VERY pleased with the work you all do

Dietmar

[Linus Torvalds]

On Sat, 29 Nov 2025 at 09:18, 'Dietmar Flubacher' via Subsurface
Divelog <subsurfac...@googlegroups.com> wrote:
>
> my EON core just crashed and cannot be repaired. I am thinking about getting a Suunto Nautic.
> Are you planning to support it and if so, any idea when this will happen?

The newer Suunto dive computers seem to all be based on the "sync with
Suunto cloud using the Suunto App only" model.

So I *assume* the Suunto Nautic is basically going to work the same
way as the Suunto Ocean: it will only sync to the Suunto App, and then
you can download a FIT file, and import that into subsurface.

And honestly, I have the Suunto Ocean somewhere, and I never use it,
because it was so flaky. It randomly simply didn't sync some dives at
all.

I had about a 10% failure rate, where one dive randomly would never
show up after the sync, even when other dives the same day did.

And I'm not talking about "randomly didn't sync into subsurface". I am
talking about the Suunto App itself randomly not seeing all the dives
that I could see on the dive computer itself, and no way to make it
sync properly, because it was all "automatic" and done for you.

Automatic but unreliable is not good.

In other words - as a Finn, I'm very sad to say that I cannot
recommend Suunto dive computers. They used to be really solid things
(although some of them were *much* too conservative in some
situations).

My reaction to the Suunto Ocean was "this is a running watch that
tries to do scuba diving instead".

Maybe that Nautic is better. Maybe Suunto has fixed the flaky sync
issue. I wouldn't know.

And if it does work, we *can* already import the FIT files in the
desktop app, but it's a multi-step process:

(1) sync the dive to the Suunto app - and hope that sync actually
happens, because if it doesn't, you can only see the dive on your dive
computer

(2) on the suunto app, do the "download fit file" thing

(3) move the file from your phone to your laptop (I used google
drive, but any file transfer thing works)

(4) import the FIT file into subsurface

end result: I still like and use my old Suunto EON Core, but the
Suunto Ocean is in some drawer somewhere gathering dust.

Too bad.

I can recommend Shearwater. Their bluetooth is slow and a bit flaky,
but they still put the diver first,

Linus

[Michael Keller]

Hi Dietmar.

On 30/11/2025 07:01, Linus Torvalds wrote:

I can recommend Shearwater. Their bluetooth is slow and a bit flaky,
but they still put the diver first,

Or, if you want a smartwatch that has a decent dive computer built in, go for a Garmin Descent. The drawback is that it requires an USB connection to download dives directly into Subsurface, but on the flip side it does all of the things you'd expect from a smartwatch.

Ngā mihi

  Michael Keller

[Dietma Flubacher]

Hi Michael, hi Linus

Thanks for the recommendation, but so far I was quite happy with my Suunto(s). And I have also Pods that work with Suunto and having the same for Shearwater becomes quite expensive. 

So, my question remains: what are the plans with the Suunto Nautic: will it be supported and if so, any idea how long will it take?

Dietmar

Am 29.11.2025 um 22:22 schrieb Michael Keller <mike...@042.ch>:



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[Michael Keller]

Hi Dietmar.

On 30/11/25 21:12, 'Dietma Flubacher' via Subsurface Divelog wrote:

Hi Michael, hi Linus

Thanks for the recommendation, but so far I was quite happy with my Suunto(s). And I have also Pods that work with Suunto and having the same for Shearwater becomes quite expensive. 

So, my question remains: what are the plans with the Suunto Nautic: will it be supported and if so, any idea how long will it take?

As Linus stated in his post, from the looks of it the Suunto Nautic is already supported in Subsurface, in a laborious and unreliable way:

And if it does work, we *can* already import the FIT files in the
desktop app, but it's a multi-step process:

(1) sync the dive to the Suunto app - and hope that sync actually
happens, because if it doesn't, you can only see the dive on your dive
computer

(2) on the suunto app, do the "download fit file" thing

(3) move the file from your phone to your laptop (I used google
drive, but any file transfer thing works)

(4) import the FIT file into subsurface

Not sure if this will ever improve - doubt Suunto will have much motivation to open up their watch to app protocol, and reverse engineering is likely going to be a lot more complex than other 'pure' dive computers, as these are smart wartches / sports watches with an added on dive computer mode, rather than devices that are only dive computers.

Ngā mihi

  Michael Keller