Built in 1987, there are no AutoCAD drawings avaible for this vessel. As I write this, the original designer, Herman Jansen BV in The Netherlands, is converting the original paper drawings into electronic versions.
I've scanned deck plans and make crude drawings myself to explain to the designer what I want so he can put my ideas into AutoCAD or similar software. The current design draft aft is 5.1 meters (16.4 ft). This will be reduced to about 4.5 meters (2 ft. less) so we can have port holes in the side of the ship high enough above the waterline as required by the classification rules.
As you can see, lots of space.