AIM

4/3/14

5−6−1

National Security and Interception Procedures

Section 6. National Security and Interception Procedures

5

−

6

−

1. National Security

a.

National security in the control of air traffic is

governed by 14 CFR Part 99.

b.

All aircraft entering domestic U.S. airspace

from points outside must provide for identification

prior to entry. To facilitate early aircraft identification

of all aircraft in the vicinity of U.S. and international

airspace boundaries, Air Defense Identification

Zones (ADIZ) have been established.

REFERENCE

−

AIM, ADIZ Boundaries and Designated Mountainous Areas, 
Paragraph 5

−6−5.

c. Operational requirements for aircraft oper-

ations associated with an ADIZ are as follows:

1. Flight Plan.

Except as specified in subpara-

graphs d and e below, an IFR or DVFR flight plan

must be filed with an appropriate aeronautical facility

as follows:

(a)

Generally, for all operations that enter an

ADIZ.

(b)

For operations that will enter or exit the

U.S. and which will operate into, within or across the

Contiguous U.S. ADIZ regardless of true airspeed.

(c)

The flight plan must be filed before

departure except for operations associated with the

Alaskan ADIZ when the airport of departure has no

facility for filing a flight plan, in which case the flight

plan may be filed immediately after takeoff or when

within range of the aeronautical facility.

2. Two-way Radio.

For the majority of opera-

tions associated with an ADIZ, an operating two-way

radio is required. See 14 CFR Section 99.1 for

exceptions.

3. Transponder Requirements.

Unless other-

wise authorized by ATC, each aircraft conducting

operations into, within, or across the Contiguous U.S.

ADIZ must be equipped with an operable radar

beacon transponder having altitude reporting capa-

bility (Mode C), and that transponder must be turned

on and set to reply on the appropriate code or as

assigned by ATC.

4. Position Reporting.

(a) For IFR flight.

Normal IFR position

reporting.

(b) For DVFR flights.

The estimated time

of ADIZ penetration must be filed with the

aeronautical facility at least 15 minutes prior to

penetration except for flight in the Alaskan ADIZ, in

which case report prior to penetration.

(c) For inbound aircraft of foreign regis-

try.

The pilot must report to the aeronautical facility

at least one hour prior to ADIZ penetration.

5. Aircraft Position Tolerances.

(a)

Over land, the tolerance is within plus or

minus five minutes from the estimated time over a

reporting point or point of penetration and within

10 NM from the centerline of an intended track over

an estimated reporting point or penetration point.

(b)

Over water, the tolerance is plus or minus

five minutes from the estimated time over a reporting

point or point of penetration and within 20 NM from

the centerline of the intended track over an estimated

reporting point or point of penetration (to include the

Aleutian Islands).

6. Land

−Based ADIZ. Land−Based ADIZ are

activated and deactivated over U.S. metropolitan

areas as needed, with dimensions, activation dates

and other relevant information disseminated via

NOTAM.

(a)

In addition to requirements outlined in

subparagraphs c1 through c3, pilots operating within

a Land−Based ADIZ must report landing or leaving

the Land−Based ADIZ if flying too low for radar

coverage.

(b)

Pilots unable to comply with all require-

ments must remain clear of Land−Based ADIZ. Pilots

entering a Land−Based ADIZ without authorization

or who fail to follow all requirements risk

interception by military fighter aircraft.

d. Except when applicable under 14 CFR

Section 99.7, 14 CFR Part 99 does not apply to
aircraft operations: