Look at a question by a passenger going on the Coral Princess dated 6th September, the lady in question asked a similar question as yours. As I am unable to answer your question directly (not allowed) have a look at the answers to this question to see what you can come up with. I expect this sounds a bit odd to you but if you look all will be revealed.
Thank you for your answer, it was very much appreciated. We are already on this route.