Shares of Norwegian Cruise Line Holdings (NYSE: NCLH) stock closed up 4.6% on Monday after the cruise ship operator announced its "great cruise comeback." Today, said Norwegian Cruise Line, the vessel "Norwegian Jade set sail from Athens as the first ship in the Company's fleet to relaunch since cruises halted in March 2020." To ensure the success of its inaugural post-coronavirus cruise, the company has instituted "multiple layers of preventative protocols, including universal COVID-19 testing immediately prior to boarding" the Norwegian Jade.