By Ross Carlson 887155
#523147 You asked about the "data tag" by which I would normally assume you meant "data block", but I think you're actually asking about the position symbol, because your screenshot depicts a type of position symbol that I did not include in the documentation. :oops:

The triangle position symbol represents a "Free Track", which means that the track is not associated with a flight plan that contains a route. If the flight plan does contain a route, then the position symbol would be the diamond shape that you normally see, which represents a "Flight Plan Aided Track" or "FLAT" track.