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AIM 

4/20/23 

EXAMPLE

 

1. 

Areas of precipitation (can be reduced by CP) 

2. 

Arrival/departure tabular list 

3. 

Trackball (control) position symbol (A) 

4. 

Airway (lines are sometimes deleted in part) 

5. 

Radar limit line for control 

6. 

Obstruction (video map) 

7. 

Primary radar returns of obstacles or terrain (can be removed by MTI) 

8. 

Satellite airports 

9. 

Runway centerlines (marks and spaces indicate miles) 

10. 

Primary airport with parallel runways 

11. 

Approach gates 

12. 

Tracked target (primary and beacon target) 

13. 

Control position symbol 

14. 

Untracked target select code (monitored) with Mode C readout of 6,000’ 

15. 

Untracked target without Mode C 

16. 

Primary target 

17. 

Beacon target only (secondary radar) (transponder) 

18. 

Primary and beacon target 

19. 

Leader line 

20. 

Altitude Mode C readout is 6,000’ 

(Note: readouts may not be displayed because of nonreceipt of beacon information, garbled beacon signals, and flight plan 

data which is displayed alternately with the altitude readout) 

21. 

Ground speed readout is 240 knots 

(Note: readouts may not be displayed because of a loss of beacon signal, a controller alert that a pilot was squawking 

emergency, radio failure, etc.) 

22. 

Aircraft ID 

23. 

Asterisk indicates a controller entry in Mode C block. In this case 5,000’ is entered and “05” would alternate with 

Mode C readout. 

24. 

Indicates heavy 

25. 

“Low ALT” flashes to indicate when an aircraft’s predicted descent places the aircraft in an unsafe proximity to 

terrain. 

(Note: this feature does not function if the aircraft is not squawking Mode C. When a helicopter or aircraft is known to 

be operating below the lower safe limit, the “low ALT” can be changed to “inhibit” and flashing ceases.) 

26. 

NAVAIDs 

27. 

Airways 

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Surveillance Systems