Irish Continental Group has reported a 30.6% jump in operating profit for the first half of the year, though pre-tax earnings at the company was down by 10.8%.
Revenue at the passenger and freight ferry company were 3.3% higher at €120.9 million between January and June of 2013.
Coupled with lower fuel costs, this helped the firm to generate an operating profit of €6.4 million.
However a €1 million net pension expense - along with €2.1 million in bank interest - saw pre-tax profits fall to €3.3 million, €400,000 lower than in the first six months of 2012.
ICG, which operates the Irish Ferries and Eucon brands, attributed its improved revenue to a rise in freight carryings.
However it said this was partially offset by a fall in the number of passengers taking cars on their ferry crossings.
See how Irish Continental Group shares are performing in Dublin trade.