Jerry, what you need to do is take the LL of the ends of the boundry line, save these as waypoints, then make a route out of the waypoints, this will leave a line on your chartplotter.
We sell alot of Garmin 162's to commercial fisherman in Bristol bay for this specific purpose. ADFG up there use these units (162's) to mark the boundries with, if a commercial fisherman is caught 5 ft. over the line they risk losing their boat.