They are two pin but 110/220v, so you need an adaptor.
Sea Princess has UK 3 pin 230v sockets in cabins as it was P&O Adonia for a while based in UK. Brian.
Thank you, but BLYTH from Dundee is saying its two pin 110/220v
Just been on the Sea Princess and the cabins have UK 3 pin Sockets it is the only Princess ship as far as I know that has 3 pin sockets.
I can assure you they have 3 pin plugs not a 2 pin in sight if you are that worried take an adaptor.
Can I suggest you purchase a very cheap adapter, leave it in your suitcase & you will never need to consider this problem again. It really isn't worth the hassle........Wilba.