When to use HH:MM over MM:SS for times?

[m00dawg]

I'm a bit confused on when to use what time units in MacDive for various things. Is there a way to know which way it wants? I have been doing MM:SS everywhere (and thus for longer surface intervals, I just put in, say, 75:00) but I wasn't sure if that was right and couldn't quite figure it out For things like air consumption it certainly matters, but in general I've just kept to MM:SS in my logs for consistency. Still, I'd like to be doing it the correct way

I'm putting in these numbers manually obviously as my dive computer (an Oceanic Veo 1.0) does not support syncing to a computer.

[nick]

From memory it's just the surface interval that's in hh:mm, the rest should be mm:ss. I've been meaning to make this more consistent as it's rather confusing and inconsistent.

[m00dawg]

Cool thanks for the info!