1. HDG (heading) Mode-Heading Preselect and Hold. When HDG and NAV activated simultaneously, enables dual mode intercept - autopilot operates in heading mode to automatically intercept and track selected course or localizer; at which point HDG extinguishes. **
2. Pitch Modes. Include VS indicating vertical speed control has been selected, up and down; ALT, indicating altitude hold is engaged, capturing existing altitude when activated; and GS, indicating glideslope coupling is armed and/or active. *
3. Mode Selector Buttons. For HDG (heading)**, NAV (tracking VOR/GPS en route), REV (LOC backcourse), VS (vertical speed) command*, and ALT (altitude) hold*.
4. Annunciations. For RDY (autopilot ready), FD (flight director) active, and mode selected.
5. NAV (coupled navigation) mode. Automatic intercept and tracking of en route NAV signals (VOR/GPS). Intercept and gain levels annunciated by CAP and SOFT; CAP indicates course capture and initiation of tracking gain program, and SOFT indicates lower, less sensitive gain for en route tracking and smooth station passage. 3-level gain selection for NAV mode is automatic. When APR is lit (simultaneous with NAV), indicates high gain localizer mode for high sensitivity coupled approach. Flashing NAV or REV annunciates course deviation of 50% or more.
6. Up/Down Multi-Function Lighted Buttons. Annunciates out-of-pitch-trim condition when trim illuminates; buttons command vertical speed changes when VS activated. Altitude can be modified (trimmed) in increments using the UP/DN command button, when altitude hold is engaged.*

* System Sixty-Two (60-2) Features and Functions
** Operational if heading system is installed and active.