EVE Online's tactical warfare, making it harder for other players to locate and consequently destroy your ship. They're created by making a bookmark while in warp, which causes the bookmark to lead to the middle of nowhere. When you're on the run from bad guys, you can often slip away by warping between several safe spots while they try desperately to scan you down. Deep safe spots are illegal bookmarks created far outside the bounds of a solar system. Pilots hiding here needn't bother warping around to evade pursuers, as they'll be quite literally off the grid and virtually impossible to locate. Deep safe spots several hundred AU from the nearest celestial object have also been used in the past to jump huge capital fleets into a hostile system without fear of being attacked.