Here's what it's like on a test cruise
Royal Caribbean is one of the few major cruise lines to do test cruises as a prerequisite to restarting cruise ship sailings from the United States.
The U.S. Centers for Disease Control and Prevention (CDC) requires cruise lines that do not mandate at least 95% of its guests be fully vaccinated to complete a test cruise for each of its ships in order to receive permission to sail again.
I have been lucky enough to go on two of Royal Caribbean's test cruises. One on Mariner of the Seas and the other on Allure of the Seas.