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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.
AIM, Paragraph 5-6-5 , ADIZ Boundaries and Designated
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
(a) Generally, for all operations that enter an
(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
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
(b) For DVFR flights:
(1) The pilot reports to an appropriate
aeronautical facility before penetration: the time,
position, and altitude at which the aircraft passed the
last reporting point before penetration and the
estimated time of arrival over the next appropriate
reporting point along the flight route;
(2) If there is no appropriate reporting point
along the flight route, the pilot reports at least 15
minutes before penetration: the estimated time,
position, and altitude at which the pilot will penetrate;
(3) If the departure airport is within an
ADIZ or so close to the ADIZ boundary that it
prevents the pilot from complying with paragraphs
(b)(1) or (2) of this section, the pilot must report
immediately after departure: the time of departure,
the altitude, and the estimated time of arrival over the
first reporting point along the flight route.
(c) For inbound aircraft of foreign reg-
istry. 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
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
(a) In addition to requirements outlined in
subparagraphs c1 through c3, pilots operating within
National Security and Interception Procedures 5-6-1