background image

AIM 

4/20/23

 

4

5

4

Surveillance Systems

the entire flight. Assignments are made by the ARTCC computer on the basis of the National Beacon Code
Allocation Plan. The equipment is also designed to receive Mode C altitude information from the aircraft.

NOTE

Refer to figures with explanatory legends for an illustration of the target symbology depicted on radar scopes in the NAS
Stage A (en route), the ARTS III (terminal) Systems, and other nonautomated (broadband) radar systems. (See FIG 4

5

3

and FIG 4

5

4.)

d.

It should be emphasized that aircraft transponders greatly improve the effectiveness of radar systems.

REFERENCE

AIM, Para 4

1

20, Transponder and ADS

B Out Operation.