Suunto Nautic - will it be supported?
Dietmar Flubacher
Linus Torvalds
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?
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.
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
Am 29.11.2025 um 22:22 schrieb Michael Keller <mike...@042.ch>:
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Michael Keller
Hi Dietmar.
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
dietmar....@gmx.net
Hi Michael,
ok, after rcovering from a cold, I was finally able to really use my Suunto Nautic. Looking great so far.
One problem though during import to Subsurface: there is no import of the gas data, no way to see air consumption during the dive. I took a look to the JSON that you can export from the Suunto App and there you can see the data. Not sure if it part oft the .fit file.
It would be a shame if this info cannot be imported to ubsurface – any idea/proposal? How was this managed in the past?
Thanks
Dietmar
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Michael Keller
Hi Dietmar.
ok, after rcovering from a cold, I was finally able to really use my Suunto Nautic. Looking great so far.
Glad to hear you're back to diving. 😃
One problem though during import to Subsurface: there is no import of the gas data, no way to see air consumption during the dive. I took a look to the JSON that you can export from the Suunto App and there you can see the data. Not sure if it part oft the .fit file.
Yeah, I think this is a bit of a systemic issue with the use of FIT files for dive logs. The FIT data format was introduced by Garmin to support logs for fitness activities like running, biking, you name it. As such it has support for a lot of things that are not at all relevant for diving, like lap times, and no native support for diving specific things like tank pressures. When Garmin introduced their 'Descent' dive computer smart watches, they shoehorned support for these things into the FIT format by adding custom extensions.
As it looks now, other manufacturers have jumped onto the bandwagon and started to (ab-)use FIT for dive logs. And from the looks of it, sadly, they have not bothered to implement the same custom extensions that Garmin introduced for dive logs.
So Suunto either does not include tank pressure information in their FIT files, or they do so, but in a different custom format.
It would be a shame if this info cannot be imported to ubsurface – any idea/proposal? How was this managed in the past?
I can see two ways:
- if you supply sample FIT files and accompanying dive logs in a format that can be analysed (can be a profile image showing the gas information), I can have a stab at finding the tank pressure information in it and see if it is possible to add support for it;
- there are other standardised formats that like UDDF that are intended for use for dive log files - does Suunto offer the export in any other format?
Ngā mihi
Michael Keller