Sorry, I have no idea how to reproduce this (and that's probably for the best) but today, I was looking through the time machine because I alway like to see where my others subs are when a sub lands.
I tapped the time machine by accident (and I think I moved the scrubber) and by reflex, I closed the time machine .
Anyway, during that small split second, I saw theough the sonar of a dormant outpost I was taking in the future. What I mean is that the fog of war was cleared like I had captured the outpost, although I had not yet currently.
I feel very guilty now because I was able to see three subs coming out of an enemy outpost
Tl;dr: accidentally saw what the dormant outpost was able to see even though I hadn't captured it yet; saw three enemy subs feel guilty