We took a vacation with Holland America this past spring traveling from Vancouver, B.C. to Hawaii and return.
Being interested in amateur radio, I went to the company's web site and asked if I could bring my handheld with me. The response was unequivocal, if I brought it on board and it was discovered, the radio would be confiscated. Don't even think about bringing it with you much less using it. Too bad if you only intended to operate it ashore, it is still forbidden.