Trawler Tracker is a special release of the Krogen Finder App that allows friends and family members to track an individual vessel. This app is only applicable for those who have received a "Vessel Tracking Key" from the captain of the vessel you desire to follow.
Unlike Krogen Finder, this app only shows the location of one vessel. Krogen Finder is for the private use of Krogen Cruisers; Trawler Tracker allows a Krogen Cruiser to share the location of his vessel and only his vessel with others.