![]() You can see the frequency of a VOR when you click on it in the navigation menu of Aerofly FS. At Edwards Airforce Base (KEDW) the nearby VOR “EDW” has the channel 111X or 116.40 MHz. To tune a TACAN or VOR station you either need to know the channel number or the frequency. Press the TCN button to open the TACAN page, then press the ON/OFF button to toggle the state. You can turn this transceiver on or off with the up front controller. The TACAN or VOR receiver is set to ON per default. You can hide this TACAN steering information on the HUD by pressing the button labeled “TCN” on the left hand menu on the HSI display on either DDI or on the MPCD. The angle between the arrow and the up direction shows the course deviation that is currently present. An arrow points to the TACAN or VOR station. The scale is only drawn towards one side and is removed when the deviation is small. When a valid signal is received a small arrow with a deviation scale is displayed. The HUD can also display tactical air navigation (TACAN) or VOR course deviations for flying towards or away from a TACAN/VOR at a set radial. Once the HDG or CRS switch have been moved the up front controller enables a direct heading or course selection via keypad. To change the course you need to move the switch labeled “CRS” in the top right corner of the lower display, the MPCD. The selected course is displayed in the lower right corner of the display. When the autopilot is in heading select mode (HSEL) you can also use the aileron trim command to change the selected heading. The selected heading can be changed via assigned keys or with the switch labeled “HDG” in the top right corner of the lower display (MPCD). The selected heading is displayed in the lower left corner of the HSI display. Press it multiple times to cycle through the zoom settings. To change the zoom press the button in the middle of the top row, labeled “SCL” for scale. This may look strange at first but it always shows the true relation of the aircraft to the station and radial and is quite easy to understand after a couple of minutes. Unlike typical HSIs or CDIs found in general aviation aircraft or even airliners the F18 HSI draws the radials through the TACAN or VOR station at the same scale as the displayed navaids, waypoints and moving map. The horizontal situation indicator (HSI) shows a top-down view of the aircraft's surroundings, navigation aids, waypoints, etc.
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