Dives disappeared in dive log on watch

When I upgraded from Descent Mk2i to Mk3i all dives were copied from the dive log on Mk2i to the dive log on Mk3i.

Then I did a couple of dives with the Mk3i and the dives were added to the log on the watch. But now suddenly (could have been after the system update) the two newest dives I did with the Mk3i are not in the log on the Mk3i anymore. All the old dives done with Mk2i are still there in the Mk3i dive log. 

In the Garmin Dive app all dives are there in the log. Both the old ones from Mk2i and the two new dives done with Mk3i.

Is there any way to have the missing two missing dives on the Mk3i watch transferred to the Mk3i dive log from the Dive app again…?

  • Well, it is two years warranty so it would be in November 2025. 
    But I think this is a sw bug so it should be fixed despite of warranty…

  • I've bought mine through my local Dive Shop so I would assume the warranty is 1 year, not 2. I'm based in the UK (EU citizens benefit from 2 year warranty - not the same for UK unless through certain retailers). 
    Yes - it definitely is a SW bug as I've only had this issue following the last update which is the same for you. 

    Have you not contacted Garmin yet?


    Garmin Customer Support asked me to:
    1. Send a copy of the Garmin Folder. 

    2. Send a Diagnostic Report from the Garmin Dive app. 

    3. Provide my phone information (model # and current software version). 

    I've noticed that history of the dives are still on the Mk3i but not on the Dive Log itself. If you locate your activities folder on the Mk3i and scroll down until you find the Dive activities completed, it is there. But when you tap it, it opens into the Garmin Dive App. 

  • No I have not reported the problem to Garmin, but I will. So they see that more of their customers have the same problem. The dives I made with my previous Mk2i and transferred to Mk3i when upgrading, stay in the log. The two dives I made with the Mk3i (yes, I’ve only made two dives with it so far) keeps disappearing from the log after some days… I will check if the files still are on the watch.

  • Ok, I got a response from Garmin support…

    Thank you for contacting Garmin. After reviewing your recorded activities, it appears that you record numerous activities per month (for example, you recorded 42 activities in the month of May). These watches have a limited amount of memory that can be allocated to keeping these activities recorded; after hitting a certain memory threshold, the watch will begin to overwrite older activities. Garmin Connect is meant to act as the bridge for this, allowing a much greater amount of activity files to be hosted in the cloud. I would recommend accessing your dive logs via Connect / Dive app, or clearing your activity history on the watch to open more memory for future activities.

  • Somehow I don’t agree with their response to you. 

    1) I’ve got 2x dives from July 2024 which are stored fine on the dive log on Mk3i. The other 2x dives that delete themselves after 5-8 days were done in September 2024. So why would the newer dives go and not the older activities/dives in chronological order. This would be the same case for you as your dives imported over from the Mk2i are there but the 2x dives on the Mk3i seem to delete themselves. 

    2) the Mk3i has plenty of space. You can validate this when you plug the Mk3i to the computer and can see its total and free file storage space. Mine isn’t even past the halfway mark. 

    It’s definitely a SW bug. The Garmin CS advisor I’ve spoken with is very helpful and fully understands the above. She even ruled them out as a possibility. 

  • You are right. 
    And I did answer the support exactly that…

    Let’s see the responses. Hopefully your Garmin contact will escalate this problem as a sw bug. 

  • I believe the Garmin support don’t have a clue what they are talking about…

    Here is their latest reply.

    - It is possible that having such a large amount of data stored can lead to some of that data becoming stale or corrupted. This can cause the watch to behave strangely, but is typically resolved by clearing the activity history and allowing the watch extra memory to perform saving functions.

  • That’s ridiculous. Sounds like you’ve unfortunately been paired with someone from Garmin CS who’s quick to just close the case.

    Is there anyway we can contact each other outside of this forum? I’ve tried to see if I can PM you but it doesn’t open up your profile when clicking your username. I’m thinking of combining your case reference number with mine so that Garmin can investigate them together rather than unknowingly doing it independently. It’ll be better for them to review both cases simultaneously and our back menu settings. We both seem to be suffering from the exact same issue since we’ve both done their recommended SW. 

  • I’ve tried to see if I can PM you but it doesn’t open up your profile when clicking your username

    By default, receiving PMs are disabled. The user would need to change it to "Everyone" or "Friends Only" if they are in your friends group.

    Profile icon, settings...

    Once they've done that, you'll be able to hover the mouse over their name and select from the popup menu "Send a private message" Alternatively you could set it up in your profile to allow private messages and wait for them to send you a PM.