Ships in general as a form of transportation will frequently relate to some kind of ministry. In particular cruise ships tend to sail on the ocean (large impact) and carry a sizable passenger load (influence). As a result it is possible for a cruise ship to represent a ministry that is going to have tremendous impact and influence a large number of people. In a more general sense, it could relate to rest or relaxation (as cruise ships are often associated with vacations).
* Symbol meanings provided by www.mydreamstories.com should not be used as a dream dictionary. They are for reference only and both dreamer and interpreter should be careful to listen to the voice of Holy Spirit as to what any particular symbol means in any specific dream