The Century steering horizon (52C77-4) displays the flight director steering commands. The instrument is a lighted square 3-inch (ATI-3 ARINC) format with single cue delta/vee steering display. Computed steering commands allow smooth intercepts and glideslope capture when flying manually and allow the pilot to monitor closely the progress of a coupled approach.
The 52D188 is a square 3-inch (ATI-3 ARINC) electrically powered flight director instrument. The unit features a single cue delta/vee steering display as well as natural earth-sky symbology. Internally lighted, the 52D188 offers exceptional performance and reliability.