The MV Celineis the world's largest short sea Ro-Roshipand will transport freight between Dublin and the continent.
The vessel is 235m long andhas a capacity of 8km.
Such is the scale of the ship it would not have been able to dock in Dublin prior to the completion of recent expansion works.
Eamonn O'Reillysaid thehuge level of uncertainty Brexit presents is matched with shipping companies seeking to give customers certainty that goods will arrive on time.
He said he foresees that a significant amount of freight currently moving from Dublin to Holyhead will change to move from Dublin to Cherbourg, Zeebruggeand Rotterdam.
He also said Dublin Port will build the necessary custom posts and inspection facilities at the port to allow for customs checks in the event of a hard border.
He said plans are in place to prepare for this eventuality
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