So what happens when it reaches zero % ?
boomski
More importantly should I keep exploring?
Some explorers have a "turn around and head back to home if damage reaches 60%" policy. It depends on how self-confident you are. One thing for sure, if you carry on, as badly damaged as you are, you won't get a lot of sympathy if you post another thread "waah! lost all my explore data!" .. On the other hand, if you go to Sag A* and back with 12% hull - deliberately - well, that's kinda frosty.
I'm sad. 5500ly into a 128'000 ly journey. Oh well, maybe next time?
Throttle zero on jump countdown. Do not AFK unless you are parked motionless somewhere very far from anything. And even then, do not AFK.
Oh, and land verrrreeee carefully. Get jammed in the mail slot with a bigger ship and you're bugsplat.