You can transfer a boat’s radio licence by filling in the form on this page:
http://www.transport.ie/viewitem.asp?id=10775&lang=ENG&loc=2058
It costs €30. Your boat must have a licence. You must have a certificate of competency.
I am doing a course for a short range certificate of competency from the Department of Transport run by Seacraft in the Dún Laoghaire Motor Yacht Club right now.
Next class is all day Sunday, and there are no DARTs north of Connolly because of engineering works at Howth Junction. A few railcars will stop, though.