HSI Page

3-9: HSI page

1. Operating mode name

2. Current track/heading. T – true or M – magnetic

3. Actual track angle caret

4. RMI-1 - Bearing to steerpoint in this example

5. Desired track (DTK) angle

6. RMI-2 – Bearing to ADF radio beacon in this example

7. Graphical representation of cross track error (XTE)

8. XTE scale center point (no cross track error)

9. Digital XTE value

10. RMI-1 - Bearing to steerpoint in this example

11. RMI-2 - Bearing to ADF radio beacon in this example

12. XTE scale

13. Ground speed

14. Bearing to steerpoint

15. Time enroute – flight time

16. Current altitude

17. Current geographic coordinates

18. Current time

19. GPS status

20. Heading compass

21. Desired course mark

22. Graphical representation of cross track error (XTE)

23. Vertical navigation scale

24. Graphic indicator of vertical deviation from flight plan leg

25. Current route leg combined data field

26. Next route leg combined data field

27. Callsign of next steerpoint

28. Next desired track angle (DTA)

29. Next Leg distance

30. Next steerpoint estimated time of arrival (ETA)

31. Time late before reaching next steerpoint

32. Desired track angle (DTA)

33. Steerpoint name

34. Steerpoint estimated time of arrival (ETA)

35. Distance to steerpoint

36. Desired track angle

When viewing the operating mode pages for NAV, ARC, and HSI, the following items are displayed:

Current track/heading (digital and graphical representation). The value varies between 0 and 359 degrees and is displayed with a precision of one degree. It is

displayed over the compass scale and is supplemented with the letter (M) for magnetic or (T) for true. The value is displayed if information from the navigation sensor is available. If no heading data has been supplied, the screen displays the track value received from the GNSS sensor, or the heading value is shown in yellow. The format of the number is: DDD. E.g., 023 – course value of 23-degrees. Radio bearing (digital and graphical representation). The value varies between 0 and 359 degrees and is displayed with a precision of one degree. It is displayed on the outer-circle of the static HSI and ARC mode scales. If the value is outside the display scale, only the digital azimuth value is displayed. The format of reading is DDD. E.g., 025 – radio bearing value of 25-degrees from the aircraft‟s longitudinal axis. The azimuth value is shown when RMI-1(RMI-2) option is activated on the MENU/OPTIONS page. Desired track angle (digital and graphical representation). The value varies between 0 and 359 degrees and is displayed with a precision of one degree. It is displayed in the flight information area and on the compass azimuth card as a green arrow and line. The format is: DDD. E.g., 043 – heading value of 43-degrees. Ground speed (digital representation). The ground speed value ranges from -200 km/h to +1,500 km/h. The ground speed value is displayed with a precision of the selected measurement input device. In the case of a negative ground speed value (flying backwards), a “-“minus sign is displayed. Ground speed can be displayed in either kilometers per hour (KH) or knots (KNOTS). The unit type of measurement is selected from the MENU/OPTIONS/UNITS sub-mode from pop-up window. The format of the number is: DDDD. E.g.: 123 – ground speed value of 123. Cross track error (XTE) – digital and graphical representation. The XTE value can range from 0 to 999. The readout is in the unit of measurement selected from the MENU/OPTIONS/UNITS sub-menu that can be selected from the pop-up window. It should be noted that if the XTE is less than 10 measurement units, the value is shown with a digit after the decimal point (D.D format); if it is more or equal to 10 units of measurement, it is shown in whole numbers (DDD format). E.g., 3.4 (12) – the XTE is 3.4(12) km (nautical miles). This is displayed in the flight information area. XTE scale.

The XTE scale provides a graphical display of up to 20 measurement units with a level of precision according to the unit of measurement. It can be displayed in kilometers, statue miles, or nautical miles. The XTE display scale is changed automatically with the flight leg. Altitude (digital presentation). Altitude is displayed in the flight information area and can vary from –600 to +48,000 feet. The altitude is displayed in meters – m or feet – ft. The unit of measurement is selected from the MENU/OPTIONS/SETUP/UNITS sub-mode. Current leg route combined data field (digital and graphical representation). This is located in the bottom right of the display and is visible in the NAV, ARC, and HSI operating modes. It contains several information fields that provide the following data:

 Steerpoint callsign code (STP designation)

 Desired track angle that can vary between 0- and 359-degrees, and it is displayed with a precision of one degree

 Distance to steerpoint from the current aircraft position. This value can range between 0 and 9,999. It is displayed in kilometers – km or nautical miles – nm. The unit of measurement is selected from the MENU/OPTIONS/SETUP/UNITS sub-mode

 Steerpoint estimated time of arrival (ETA) can vary from 00:00 to 23:59. The time value is displayed with a precision of one minute when in route flight and it has a precision of up to one second when in the terminal area. If it is impossible to calculate the time value, the time field displays “--:--”.

 Time late in reaching steerpoint can vary between 00:00 and 23:59 (MM : SS)

Next route leg combined data field. Similar to the current leg information field as described above, but this field is in regards to the next leg in the route. The difference is displayed as the “S” value that shows the distance between waypoints.

3-10: Current and next route leg combined information fields

1. Current route leg information field

2. Current steerpoint callsign

3. Desired track angle

4. Distance to steerpoint

5. Estimated time of arrival at steerpoint

6. Estimated time late at reaching steerpoint

7. Next route leg information field

8. Next steerpoint callsign

9. DTA to next steerpoint

10. Distance to the next route leg

11. Estimate time of arrival at next steerpoint

12. Estimated late time at reaching next steerpoint

Current geographic coordinates (graphical and digital representation). This displays the latitude and longitude of the aircraft‟s current position. Display format:

 For latitude: DD°MM.MM N(S) or DD°MM‟SS‟‟N(S)

 For longitude: DDD°MM.MM E(W) or DDD°MM‟SS‟‟E(W)

DDD indicates degrees, MM indicates minutes, SS indicates seconds, and N(S), E(W) for the hemisphere. The parameters are displayed so that the longitude degrees are exactly under latitude degrees, longitude minutes are under latitude minutes, and the longitude hemisphere letter is under the latitude hemisphere letter. Map. The map is displayed in the map field. The set of objects displayed on the map depends on the map scale in use. Map scale. The current scale of the map is displayed on the map field. Map scale is indicated by showing the centimeter/kilometer and centimeter/mile ratio. The following scales are used: 1:100 km; 1:50 km; 1:40 km; 1:30 km; 1:25 km; 1:20 km; 1:15 km; 1:12,5 km; 1:10 km; 1:7.5 km; 1:6 km; 1:5 km; 1:4 km; 1:3 km; 1:2,5 km; 1:2 km; 1:1.5 km; 1:1.25 km; 1:1 km; 1:0.75 km; 1:0.6 km; 1:0.5 km; 1:0.3 km; 1:0.25 km; 1:0.2 km; 1:0.15 km. North arrow (graphical representation). The graphical representation shows an arrow pointing towards north and has the letter “N” on it. Compass card (graphical representation). This is a schematic display of a compass card with digital designations every 30-degrees and degree marks with an interval of no more than 5-degrees. It is displayed in HSI and ARC modes. Active route (graphical representation). The current route is displayed in the form of a blue line with a steerpoint symbol. Value display formats in the ABRIS