Cruise News Briefing - June 21, 2021. Two more cruise ships set sail with U.S. cruisers over the weekend, one setting off on its maiden voyage with guests. MSC Cruises has made it clear that if you cruise unvaccinated, you will have to buy a mandatory travel insurance policy from the cruise operator. Three Carnival Corporation (CCL) brands — Carnival Cruise Line, Princess Cruises, and Holland America — were breached in a cyber attack this spring. Cruise line stocks were down on Friday for CCL, RCL, and NCLH.