Inconsistent Departure Anchors types can cause bugs #7110
Description
From Oct 14th onward, using ship vanish on ships at or near mission start caused wings arriving from motherships to not actually arrive. Thanks to digging by Goober, it was determined that departure anchors sometimes are ship nums and sometimes are indexes into Parse_names. These are usually the same, but not always, which can lead to buggy behavior such as the example noted. Gobber stated he is working on adding a post-processing step to mission parsing to make everything consistent.