[SV_BubbleTime]

There’s a strange sense of scale on that thing. You wouldn’t immediately look at it and say that two people can fit inside for 30 days.

EDIT: 30 days between maintenance. I’m a dirty skimmer.

[meepmorp]

I think it's 30 days of diving, not 30 continuous days submerged. You can use it a whole month before you need to take a maintenance day.

There's a 3d panorama view of the interior of the sphere linked from the article - I doubt anyone's spending more than a day in there at a go, let alone with someone else.

Edit: apparently, it's 3 people - the pilot and 2 scientists.

[riversflow]

What?

> Alvin enables in-situ data collection and observation by two scientists to depths reaching 6,500 meters, during dives lasting up to ten hours.

Maybe you misskimmed:

> Alvin is a proven and reliable platform capable of diving for up to 30 days in a row before requiring a single scheduled maintenance day

[SV_BubbleTime]

I did skim! :) Don’t do that.