28. Primary target only
29. Nonmonitored. No Mode C (an asterisk would indicate nonmonitored with Mode C)
30. Beacon target only (secondary radar based on aircraft transponder)
31. Tracked target (primary and beacon target) control position A
32. Aircraft is squawking emergency Code 7700 and is nonmonitored, untracked, Mode C
33. Controller assigned runway 36 right alternates with Mode C readout
(Note: a three letter identifier could also indicate the arrival is at specific airport)
34. Ident flashes
35. Identing target blossoms
36. Untracked target identing on a selected code
37. Range marks (10 and 15 miles) (can be changed/offset)
38. Aircraft controlled by center
39. Targets in suspend status
40. Coast/suspend list (aircraft holding, temporary loss of beacon/target, etc.)
41. Radio failure (emergency information)
42. Select beacon codes (being monitored)
43. General information (ATIS, runway, approach in use)
44. Altimeter setting
45. Time
46. System datrea

Surveillance Systems

4-5-7