It is possible to arm a mode, which means that it will automatically be engaged once certain criteria are met. For example, during climb with VS active, another vertical mode such as ALT can be armed. Once the aircraft approaches the newly selected level, VS will be disengaged and replaced by the previous armed ALT mode.

"ALT engaged" incorrect ⇒ if you engage ALT, the aircraft will capture the current altitude.

• The correct sequence would be to engage VS at the desired rate of climb (500 ft/min), arm the altitude 6000 ft so that it captures the desired altitude. VS will then disengage and will be replaced by ALT.