Currently, it reads as follows:
A vessel's internal system grid is laid out in a 5 × 5 × 10 matrix: X (port to starboard), Y (dorsal to ventral), then Z (fore to aft).
This appears to be reversed for the Y and Z axes: it looks like Y increases ventral to dorsal, and Z increases aft to forward. I would appreciate it if others could confirm this.
EDIT: It seems like X is actually okay, but Y and Z still seem reversed.