SAC and deco switch at questions

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Kamil Schild (szastan)

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Aug 21, 2026, 4:18:05 AM (12 days ago) Aug 21
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Hi guys, 

I'm having hard time understanding two things, maybe you can help me here:

1. Equipment tab: I'm diving with Sidemount twinset config and adding two identical cylinders. While first one shows Deco switch at: 0.0m, second one always show 56m, which I cannot change. Should it be this way?
Zrzut ekranu 2026-08-21 o 08.58.40.png

2. SAC calculation: after adding all necessary data, SAC is shown in Summary tab but in information tab its always empty. Not much of a problem but also wondering if I'm not misusing some functions


Zrzut ekranu 2026-08-21 o 09.10.12.pngZrzut ekranu 2026-08-21 o 09.10.40.png

Oh, version I'm using: 6.0.5681-CICD-release. 
Any help is much appreciated 

Michael Keller

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Aug 22, 2026, 1:48:37 AM (11 days ago) Aug 22
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Hi Kamil.


On 21/8/26 19:12, Kamil Schild (szastan) wrote:
1. Equipment tab: I'm diving with Sidemount twinset config and adding two identical cylinders. While first one shows Deco switch at: 0.0m, second one always show 56m, which I cannot change. Should it be this way?
Zrzut ekranu 2026-08-21 o 08.58.40.png

2. SAC calculation: after adding all necessary data, SAC is shown in Summary tab but in information tab its always empty. Not much of a problem but also wondering if I'm not misusing some functions


Thanks for the detailed report and screenshots. Both issues have been identified and fixes are in review:


1. "Deco switch at" value reverting — the entered depth was being silently discarded by the undo command infrastructure, affecting both newly-added and imported cylinders. Fixed in PR #4921.


2. Imported cylinders showing 0.0 m — when no switch depth is reported by the dive computer, the field now shows the calculated MOD (based on the gas mix and your deco pO₂ preference) instead of 0.0 m, consistent with how a newly-added cylinder behaves. Also covered in PR #4921 / #4923.


3. SAC empty in the Information tab — for dives with multiple cylinders using the same gas mix (as in a sidemount twinset), the per-cylinder depth tracking couldn't distinguish between the two cylinders and suppressed the SAC display entirely. Fixed in PR #4922.


The fixes will be included in a future release once the PRs have been merged.


Ngā mihi

  Michael Keller

Kamil Schild (szastan)

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Aug 22, 2026, 7:23:43 AM (11 days ago) Aug 22
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Hi Michael,

sure, glad to help, thanks for taking care of these so quickly

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