The long-term and stable economic relationships between the GDR and the USSR make it practicable to use specialised ships on this service.
Ubuhlobo obunexesha elide nobuzinzileyo kwezoqoqosho phakathi kweGDR kwakunye neriphabliki yaseRashiya zenza kube lula ukusebenzisa iinqanawa ezinobuchule kulo msebenzi.