Systems and procedures for tracking the locations of passengers on a vessel are provided. Example systems may include a portable tag configured to be assigned to a passenger, the tag encoded with a tag identifier; a plurality of tag readers configured to be positioned at predetermined locations on a vessel, each tag reader configured to read the tag identifier of the tag when the tag reader receives a signal from the tag; a tracking component configured to communicate with the tag readers, the tracking component configured to receive, from a detecting tag reader, an indication that the signal has been received from the tag, the tracking component configured to determine a detected location of the tag based at least in part on the predetermined location of the detecting tag reader; and a notification component configured to send towards a user device, a notification including the detected location.