What is EFIS?
Electronic Flight Instrument System. The EFIS control panel has knobs & buttons & allows for selection of RADALT or Baro mins, In or HPA altimeter, VOR or ADF,, etc.
What is the green circle displayed on the speed tape on the left side of the flight display?
The green circle is the flaps UP maneuvering speed and is only displayed when the flaps are up.