bleeb
Contributor
A slightly different but related matter:
I'm visiting friends in Bali & staying at their house in the mountains.
My friends are also keen on going diving with me, but they haven't done it since they moved to Bali last year.
Now my question: is there any serious risk of getting bent after 2 dives to let's say 30m & then going back "home" afterwards which happens to be at an elevation of 500m?
Thnx for your input!
The short answer is that it's marginally possible, especially if you're near NDLs, or have done a fast ascent.
One set of recommendations is the NOAA Ascent to Altitude Table. (Note: Be careful to use the NOAA dive tables on the same page, and not someone else's.) As you can see, for a 500 m ascent (rounded up to 2000'), most 30 m dives are unlikely to be an issue, but the longer ones might require a bit more surface interval before ascending.
From my non-expert reading of past SB discussions, long shallow dives might actually be more likely to benefit from a bit of an SI before ascending. Most tables seem to be based primarily on one or a few theoretical compartments, while in reality long dives are more likely to fully load faster tissues, but that's where even a relatively short SI before ascending would unload them adequately.