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Anonymous File :-(, x)
>>227506 I see: 1 RMI 1 VOR 2 HSI's 1 Standby Compass
Although on some of these instruments you can see your heading, they all serve a different purpose.
The HSI (Horizontal Situation Indicator) is a compassrose. The VOR has a rose which must be moved by hand and is used to navigate with VOR beacons. The RMI displays a moving compass rose and a needle pointing to and NDB beacon.
The standby compass is purely magnetic and is used to crosscheck the HSI's with (they work with a gyro) and in case of instrument failure.
PIC: Original DC-3 cockpit
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