My husband and I use walkie talkies, but they don't work that well on the ship, as the others have stated. They do work well when you get off at the ports. My husband hates to shop, so we usually split up so I can shop. He goes to a pub and visits with the locals. (He speaks fluent Spanish, and likes to practice it when we are in Mexico.) I shop, shop, shop!!! We check in with each other periodically and meet at a certain place and time.
Have a wonderful cruise!!!
Libragirl from Texas