Tacview is a flight assessment utility for the Lock On and DCS series, as well as some other titles. Tacview records mission events in real time and plays back using ACMI-type (Air Combat Maneuvering Instrumentation) symology. This provides for a post-mission review capability in real time and 3D space, including movement of units, weapon trajectories, etc.

Program credit to Vyrtuoz.

For more information, see:
http://lomac.strasoftware.com/tacview-en.php