A Bendix King KI 525A horizontal situation indicator model, combinating heading, VOR and ILS indicators.1: lubber line for [2]
2: compass card, indicates current true magnetic heading (186°)
3: heading select bug, pilot can set its position with [4] to memorate the direction to be followed, or for autopilot
4: heading select knob for [3]
5: heading gyro inoperativity warning flag
6: VOR course and back course select pointer for [8], set to radial 213
7: VOR course select knob for [6]
8: VOR course deviation indicator, currently the airplane is about 3.5° right to radial 213, or left to back radial 033, based on [6] and [2] (see more at File:VOR Course Deviation Indicator explanation.gif
9: TO/FR indicator in TO position, in connection with [8]
10: NAV (VOR) and ILS inoperativity warning flag
11: ILS Glide Slope pointers, currently the airplane is about 0.3° under the ideal glide slope. When ILS frequency is used then [8] indicates side deviation from the localizer center beam; when VOR frequency is used then [11] pointers are retracted or covered.
derivated from Horizontal situation indicator-en.svg made by Mysid
derivative work: Orion 8