Irish Continental Group (ICG) has bought its sixth containership.

The Dublin-based shipowner, best known as a ferry operator, said it has acquired the 974-teu CT Rotterdam (built 2009) for an undisclosed price.

In a statement Wednesday, ICG said it had invested more than €25m ($22.7m) in expanding and improving its container fleet in the first ten months of the year.

That included the purchase of in April of the 1,421-teu Thetis D (built 2009), a deposit on the acquisition of the CT Rotterdam, and initial investment in exhaust scrubber systems for its vessels.