Norwegian transport group Det Stavangerske Dampskibsselskab (DSD) had a sharp increase in revenue last year.

But the privately owned parent company of DSD Shipping reported a slight drop in profit.

According to its annual report, operating revenue rose by 70% to NOK 5.9bn ($737.5m), thanks mainly to a consolidation of bus operator Tide. But pre-tax profit dropped from NOK 72m to NOK 68m.