Clipper Group's Irish Sea freight specialist Seatruck Ferries has posted a more than 10% rise in cargo volumes for 2017.
Overall market growth was 3.9%, it said, citing figures from IRN Freightstat.
It said volumes on its three routes have grown more than 30% since 2015.
"Their long-sea unaccompanied service has significantly grown in popularity and 2017 was another strong year," it added.
