The boat isn't that big. It doesn't take me long to do a sweep of all the decks.
I can't check individual cabins, my wristband thing doesn't have that kind of access and the walls to private areas seem to be made of the same stuff that quarantine back in Texas was. I can't phase through them. Trust me. I tried. Fell flat on my butt but at least I didn't end up knocking myself out into night-night-ville.