190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 30-135
In this example, the aircraft's VNE values have been configured as 205 knots indicated airspeed, and 270
knots true airspeed. At high altitudes, the aircraft can reach the true airspeed limit even if its indicated
airspeed is below the normal indicated VNE "red line". The second red band on the PFD airspeed tape
alerts the pilot to this condition.
A third way to configure the aircraft's maximum airspeed limit is to enter a value for Maximum Operating
Mach Number (MMO, see Section 30.4.12
). As with TAS-based VNE, the value for MMO will be
displayed on the PFD airspeed tape using a second red band that shows the equivalent indicated airspeed at
which the aircraft's Mach number will exceed the configured maximum Mach number. At high altitudes,
the aircraft can reach the maximum Mach limit even if its indicated airspeed is below the normal indicated
VNE "red line". The second red band on the PFD airspeed tape alerts the pilot to this condition.