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On Mon, 19 Jan 2026 at 02:35, Berthold Stoeger <[email protected]>
wrote:

> Please observe that I am _not_ talking about full timezone or DST
> information.
> I am talking about the offset between local time and GMT/UTC at the start
> of
> the dive. This datum is well defined and stable, albeit potentially
> unknown on
> import.


Ok. How do you imagine this being set, and what do you think it should be
used for?
Also, should this offset be in minutes, or do we need seconds?

It belongs to the dive and combining dives with conflicting data
> should throw an error.
>

Agreed, as long as 'one dive computer has an offset set, the others have
'don't know'' is not considered a conflict - I suspect this will cover most
of the cases where this is relevant.
Also not sure if 'throw an error' is user friendly - I'd go for allowing
the diver to select what the correct offset is.


> I would suggest placing full timezone/DST information, as provided by the
> divecomputer, in extra_data.
>

If we have it - from looking at Garmin's format, best we can do is probably
an offset to UTC. And placing this into Extra Info and then using it to
feed into the offset on the dive is not the cleanest way to do this.

Ngā mihi
  Michael Keller
-- 
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W++ N o? K? w O(++) M-- V+ PS+ PE+ Y? PGP+ t
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