Everybody keeps saying why didn't the yacht move? Well this did happen on a Sunday afternoon, it's more than likely that there was minimum crew onboard. The watchstander, (must be there) and maybe a few people just lazing the day. A deckhand and a stew or two don't "just move" a mega, it's a coordinated effort from a trained crew. No law saying Captain, First Mate and Chief Engineer have to be onboard at all times, and they probably weren't being it's Sunday. The one thing I might have expected to see and didn't was a fire hose from the mega, but again, they may have only had watchstander, and not enough people for a fire team. Chief at the pumps, and Mate/Bosun and decky on the hose.