miketsp
Contributor
After the first dive, one diver looks over to another and asks him.
So what does your computer show for surface Interval?
The other diver gives him the Here's your sign look and ask him well how deep do you want to go?

In many circumstances I'd probably answer the same way.
That's the reason there's a PLAN button on my computer.
So I can see if we've done enough SI before the next dive.
In many situations what matters is if you've done enough SI and not actually how long it was.