In 1966 Wagenborg starts a programme aiming to lower the average age of the fleet. The "Egbert Wagenborg" is sold off and the sister ships "Geulborg" and "Roerborg" are ordered. The "Geulborg" is built at Scheepsbouw- en reparatiewerf Gebt. Sander N.V. in Delfzijl and Scheepswerf (Shipyard) Appingedam N.V. is chosen for "Roerborg". The addition of these two ships marks the end of an intensive newbuild period.
The ships are deployed on what is known as the Black & White Line, initiated by Egbert (Bert) Wagenborg, son of the former Managing Director Geert Wagenborg. The Black & White Line consists of a number of separate contracts, transporting coal to England on the one hand, and returning with white China clay to Maastricht on the other, hence the Black & White name.
In 1966 the board consists of Wim Vuursteen, Koop Wagenborg (son of shareholder Petrus), Egbert Wagenborg (son of managing director Geert) and Egbert L. Vuursteen. Wim Vuursteen and Egbert L. Vuursteen manage the shipping company, the passenger services and the towage service. While managing director Koop Wagenborg is responsible for the stevedoring activities and the terminal that was purchased in 1970. Bert Wagenborg is the Chartering Director and specialises to an increasing extent, in acquisition and customer relation management.