L-1011 Navigation: HSI Location (34-3)

The primary navigation display in the L-1011 cockpit is the Horizontal Situation Indicator (HSI). Here are the basic function elements of the HSI:

• The deviation bar works the same as on other HSI's or CDI's
• The type of radios at a is displayed in the small windows (NAV data source indicators) which are VOR 1, VOR 2, ILS 1 and ILS 2
• The cursor arrow is controlled by the two course knobs on the autopilot NAV MODE panel. 
• Triangular VOR indications are provided when the HSI is in VOR mode. 
• Glideslope display is provided when turned to an ILS. While using VOR, the glideslope display is shuttered. 
• The ALERT 1 Minute from R-NAV Waypoint is also used in conjunction with the INS and NAV equipment.