I've decided to take a different approach to checking this ship's values.
I created a mission with the ship AOB 90° at 2000m.
I was able to determine the values at once:
Height: 5.5 ticks for 2000m corresponds to a height of 27.6m
length: 17.4 ticks for an AOB from 90° to 2000m gives us a length of 86.9m
So there are a lot of wrong values in this identification book. I hope there aren't too many, it would be really stupid to miss out on it.
Thank you for your help.