Vertical Modes

The following table lists the independent vertical FD modes with their corresponding controls and annunciations.

Table 53: Flight Director Vertical Modes
Vertical Mode	Description	Control	Annunciation		Reference Change Increment
Pitch Hold	Holds the current aircraft pitch attitude; may be used to climb/descend to the Selected Altitude	(default)	PIT		0.5°
Selected Altitude Capture	Captures the Selected Altitude	¹	ALTS		10 ft
Altitude Hold	Holds the current Altitude	ALT Key or Button	ALT	nnnnn FT	10 ft
Vertical Speed	Maintains the current aircraft vertical speed; may be used to climb/descend to the Selected Altitude	VS Key or Button	VS	nnnn FPM	100 fpm
Indicated Airspeed	Maintains the current aircraft vertical speed; may be used to climb/descend to the Selected Altitude	IAS Key or Button	IAS	nnn KT	1 kt
¹ ALTS armed automatically when PIT, VS, IAS, or GA active, and under VNAV when Selected Altitude is to be captured instead of VNV Target Altitude

AXIS Pilot's Guide for Certified Aircraft