With the new sensor updates, the old radar display in the top center of the screen has been removed. As a result many of the armored vehicles (APCs, Tanks) do not have anyway of telling which direction other crew members are facing. Some of the vehicles like the Marid or Panther have no azimuth display either so it is impossible to communicate where targets are with regards to relative to vehicle facing or cardinal directions.
The only position that has full functionality is the Marshall commander seat. The Marshall has a proper UI indicator to show the various facings of the different crew and azimuth.