![]() ![]() The system operates in a VOR/LOC frequency range of 108.00 to 117.95 Mhz. The pilot's unit (VOR 1) is a navigation radio system which receives and interprets VHF Omnidirectional Radio Range (VOR) signals, localizer (LOC) signals, glideslope signals, and marker beacon signals. VOR/LOC indicators may be used for navigation during manual control of the aircraft, or the autopilot may be coupled to the VOR system, accepting VOR inputs to the autopilot computer. Each glideslope receiver sends GS flag and pointer deviation information to the flight director. Each VOR receiver provides a VOR input to a respective RMI indicator and VOR and localizer data to the flight director. Each VOR system includes independent receiver units for VOR/LOC and glideslope (GS). Either VOR can direct input signals to the flight director indicator. The aircraft is equipped with two VOR systems which are controlled by the NAV-I NAV-2 control panel located in the pedestal (fig. (If either system is ON, both compass sets will be energized.) 3-23. Both compass systems are shut down when the inverter switch is turned off. ![]() The heading will agree with the appropriate HSI. Compass INCREASE/ DECREASE switch Hold until the RMI compass card aligns with the magnetic heading, then release. (3) To determine directional gyro heading. RMI rotating heading dial (compass card) Read heading. ![]() When the HEADING flag retracts from view, the heading displayed will be the magnetic heading. While in the fast erect mode, the HEADING flag (HSI) will be in view. The gyro will then erect at approximately 30 degrees per minute. This will place system in fast erect mode. Compass INCREASE/ DECREASE switch Hold switch momentarily in the direction desired, and then release. ![]()
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