Sometimes, all we want is a route to empire space, so we have no plans on unravelling the chains. This means we can occasionally ignore certain bookmarks because all we want is the fastest route to empire space.
Taken directly from the wiki.eveonline.com K162 Wormhole page
|Unknown parts of space||C1, C2 or C3|
|Dangerous unknown parts of space||C4 or C5|
|Deadly unknown parts of space||C6|
|High security space||Highsec system|
|Low security space||Lowsec system|
|Null security space||Nullsec system|