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AIM 

6/17/21 

FIG 5

6

Helicopter Intercept Procedures 

d. 

Summary of Intercepted Aircraft Actions. An 

intercepted aircraft must, without delay: 

1. 

Adhere to instructions relayed through the 

use of visual devices, visual signals, and radio 
communications from the intercepting aircraft. 

2. 

Attempt to establish radio communications 

with the intercepting aircraft or with the appropriate 
air traffic control facility by making a general call on 
guard frequencies (121.5 or 243.0 MHz), giving the 
identity, position, and nature of the flight. 

3. 

If transponder equipped, select Mode 3/A 

Code 7700 unless otherwise instructed by air traffic 
control. 

NOTE

 

If instruction received from any agency conflicts with that 
given by the intercepting aircraft through visual or radio 
communications, the intercepted aircraft must seek 
immediate clarification. 

4. 

The crew of the intercepted aircraft must 

continue to comply with interceptor aircraft signals 
and instructions until positively released. 

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6

14.  Law Enforcement Operations by 

Civil and Military Organizations 

a.  Special law enforcement operations. 

1. 

Special law enforcement operations include 

in-flight identification, surveillance, interdiction, and 
pursuit activities performed in accordance with 
official civil and/or military mission responsibilities. 

2. 

To facilitate accomplishment of these special 

missions, exemptions from specified sections of the 
CFRs have been granted to designated departments 
and agencies. However, it is each organization’s 
responsibility to apprise ATC of their intent to operate 
under an authorized exemption before initiating 
actual operations. 

3. 

Additionally, some departments and agencies 

that perform special missions have been assigned 
coded identifiers to permit them to apprise ATC of 
ongoing mission activities and solicit special 
air traffic assistance. 

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10 

National Security and Interception Procedures