» Over 100,000 people are vying for a spot on Royal Caribbean's mock cruise. 5 of them told us why they're ready to go out to sea again. Over 100,000 people are vying for a spot on Royal Caribbean's mock cruise. 5 of them told us why they're ready to go out to sea again. Sophie-Claire HoellerDec 18, 2020, 00:28 IST Royal Caribbean's Symphony of the Seas is the world's largest cruise ship.Sophie-Claire Hoeller Royal Caribbean plans on operating mock cruises as part of the Centers for Disease Control and Prevention's (CDC) conditional sailing requirements. The company's mock cruises require volunteers to test its new health and safety measures.