Replacing it is the brand-new 5,200-passenger ship Iona and an as of yet unnamed vessel.
Carried out in conjunction with conservation charity ORCA, it's part of a larger effort to monitor the Irish Sea's marine life.
Guests won't have to pay the £7 a day from May 2019.
Book now to save 15% when sailing between Cairnryan and Larne!
Sail between Cairnryan and Larne and take your Caravan for FREE when travelling on a midweek ferry. Book by 18th December 2018.