Selected speed and indicated airspeed

The target speed shows what the guidance system is aiming for. The rolling digits show the current airspeed. Compare the two and watch the trend.

Indicated airspeed

Read the actual airspeed and the tape. The low-speed awareness tape indicates the margin to stick-shaker speed.

Speed target

Locate the selected-speed readout and bug. The FSS page uses magenta for an FMS target and cyan for a manually selected target.

Target source

Read the FMA and ask whether the active strategy is using thrust or pitch to manage speed.

Check the configuration

Compare speed with the displayed flap and other operational limits. Use the actual aircraft data and current indications.

Speed trend

The rolling digits are normally green. FSS describes amber when actual speed or its trend reaches the amber low-speed band, or the trend reaches VMO/MMO. Red inverse video indicates actual speed or trend at the red low-speed band or the VMO/MMO barber pole. Check pitch, thrust and active modes. ^[128]