Speed Navboxes

Speed Navboxes list 

Speed over ground (GS) Groundspeed. This value is negative if the difference between heading and track is more than 90 degrees.
True airspeed (TAS) Groundspeed corrected with indicated wind, if no pressure data is available.
Speed to Fly (STF) Speed to fly according to MC theory which takes MC setting and sink into account. 
Speed to gate/Task speed (Tsk.Sp.) Speed on task until the present position.
Task required speed (tReq.Sp) Average speed you need to achieve to complete the task inside the Task time.   
Speed Last hour (60'.Sp) Average speed achieved in the last 60 minutes.