Hello,
One can think RPA12 was built by Scheepswerf Damen? Perhaps couls VStep confirm or deny it.
A very good picture of the ship is http://www.vesseltracker.com/de/ShipPhotos/18875-Rpa12-I7325.html
You can indeed clearly see the Becker rudders (w/flaps) and the controllable pitch propellers.
Regards,
Luc