Our sons test this last Fantasy Cruise showed up on the app as an activity, then they delivered a notice with all the same info from our Stateroom host. It was for 8:15am to 9:15am, and they showed up about 8:25, with a Binax Now rapid test, the kind you can buy at CVS, Walgreens etc.
I swabbed my son by the door, with supervision from 2 CM’s who stood in the hallway, then they gave us the test to leave on a flat surface and they said they would be back in 15 min. Right about 15 min later they knocked on the door, checked the results and gave him a fist bump and told us we were all good to go. Nothing further than that, but he also told me he never had more than 2-3 kids in his group at the Club/Lab, so we weren’t too concerned with possible exposure.