Irish Continental Group has reported a 4% increase in consolidated group revenues to €95.1m for the first four months of the year.
In a trading update, ICG said that revenues at its Ferries Division rose by 3.9% to €53.6m.
For the year to May 13 - a seasonally less significant period for tourism - Irish Ferries carried 103,200 cars - down 0.7% on the same time last year.
Freight carryings were also 1.7% lower at 100,300 RoRo units.
The company said the fall reflects the tougher comparisons with last year's outperformance and is mainly related to drydocking schedules.
ICG said that total revenues in its Container and Terminal division rose by 4.3% to €44.1m.
For the year to May 13, container freight volumes increased by 4.5%, while units handled at its terminals in Dublin and Belfast inched 0.1% higher to 107,600 lifts.
ICG also said today that it has agreed a deal for the sale of the passenger ferry Kaitaki to the New Zealand ferry company KiwiRail for €45m.
The ferry, which was commissioned by and delivered to ICG in 1995, become surplus to its operational needs after the delivery of its cruise ferry Ulysses in 2001.
The vessel has been on charter outside the group since 2002, most recently to its new buyers.
ICG said the proceeds of the sale will be used for general corporate purposes.