Hello Lynda,
It's great that you want to see Ireland by cruise!
Within Ireland, there are cruises along the Shannon River with tour operators like
Le Boat or
Shannon Princess for instance. Here's a
sample itinerary of a cruise along Ireland's longest river. Would it be something you are interested in?
Another option would be to embark on a bigger cruise that has Ireland amongst its main destinations. You would then be able to disembark at various ports and take day trips from there (Cobh, Galway, Dublin, Cork,etc). By searching online, I found cruise operators like
Princess Cruises or
Norwegian Cruise Line that organize cruises around the island of Ireland.
Are there specific regions of the island you'd like to see on this cruise?
Talk soon,
Antoine