True airspeed Regulation
True airspeed means the airspeed of an aircraft relative to undisturbed air. True airspeed is equal to equivalent airspeed multiplied by (ρ0/ρ) 1/2.
Also defined in 2 more sources
Airspeed shown on the airspeed indicator (indicated airspeed) corrected for position error and nonstandard air temperature and pressure.
Guidance: Aviation Maintenance Technician Handbook — Airframe, p. G-37
Actual airspeed, determined by applying a correction for pressure altitude and temperature to the CAS.
Guidance: Pilot's Handbook of Aeronautical Knowledge, p. G-31