One of our suitcases was not delivered to our cabin. I'm 95% sure this was on Navigator. When I went down just before we sailed to ask about it, they said it was held up in security. Shortly after that, the suitcase was delivered, without our extension cord. It was one with a switch and 3 outlets. I don't think it has a circuit breaker, but it looks like a power strip with one. Power strips with circuit breakers can cause big problems on a ship, so don't bring one of those. They finally returned it to us several days later, after engineering decided it was safe.