Garmin mk3 free diving imports only one dive

[Marc Serra Fontfreda]

Hi,

Recentely I changed my Suunto D4f for a Garmin Descent mk3.

I'm using tha latest Garmin Firmware (23.30) and Subsurface 6.0.5464 on Ubuntu.

I use the dive computer for free diving.

I can import FIT files, but Subsurface shows only one dive of 23 minutes duration instead of the 14 dives.

Here a couple of screenshots and the fit file attached.

Is there a way to got all the dives separately?

Thanks!

[Michael Keller]

Hi Marc.

On Thu, 27 Nov 2025 at 09:35, Marc Serra Fontfreda <mserraf...@gmail.com> wrote:

I use the dive computer for free diving.

I can import FIT files, but Subsurface shows only one dive of 23 minutes duration instead of the 14 dives.

It looks like Garmin reports the entire freediving session as a dive, and not the individual dives. But you can manually split the dives inside a session into individual dives by right-clicking into the profile in between two dives, and then selecting 'Split dive into two':

Ngā mihi

  Michael Keller

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[Marc Serra Fontfreda]

Thanks for the quick response Michael.

I didn't know about this option. Thanks again. 

Anyway, it's a bit slow and tedious. Isn't there a way to automate it?

Missatge de Michael Keller <m...@042.ch> del dia dc., 26 de nov. 2025 a les 22:29:

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[Michael Keller]

Hi Marc.

On Thu, 27 Nov 2025 at 10:39, Marc Serra Fontfreda <mserraf...@gmail.com> wrote:

I didn't know about this option. Thanks again. 

Unfortunately it is a bit hard to discover. 🙄 

Anyway, it's a bit slow and tedious. Isn't there a way to automate it?

Not in the current version of Subsurface. Feel free to contribute a pull request to implement this functionality.

Ngā mihi

  Michael Keller

[Marc Serra Fontfreda]

Sure, but I don't have enough programming knowledge to develop it.

With a bit of luck, someone will read this conversation, find it interesting, and develop it 

:-)

El dia dimecres, 26 de novembre del 2025 a les 23:32:46 UTC+1, Michael Keller va escriure:

[poe...@xs4all.nl]

HI,

I think you can adjust the setting for the Garmin when it sees a dive as ended and starts a new dive. That interval is now perhaps too long?

it is in the Dive Setup (https://www8.garmin.com/manuals/webhelp/GUID-120241CE-9583-49CD-A0BC-8839B887F7CA/EN-US/GUID-6EC422C5-43A9-4430-BAAA-90331551BE42.html)

End Dive Delay

Allows you to set the length of time before the device ends and saves a dive after surfacing.

But it could be that a freedive is not seen as a dive and this setting does not affect what you want. When i do a freedive of 23 minutes i want to see all the descents i did for the whole session, and not see them as separate dives... You can always start-and-end the apneu dive when you want, and start another one a minute later. Than you get different fit-files, and more dives in Subsurface.

Op donderdag 27 november 2025 om 08:00:32 UTC+1 schreef Marc Serra Fontfreda: