Armed and active FMA modes

Arm guidance

Arm an appropriate navigation mode for an intercept under controlled conditions.

In a stable airborne state, choose a safe lateral mode and display the FMA.

Armed versus active

Read the active and armed indications separately as the aircraft approaches the capture conditions.

FSS describes white as armed and green or magenta as active modes according to their source.

Source and mode

Check the selected source, validity of the route or signal and the aircraft’s position relative to the path.