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set the lower limit to 1,000 feet or more below the
lowest altitude for which the controller is responsible.
When the position's area of responsibility includes
down to an airport field elevation, the facility will
normally set the lower altitude filter limit to
encompass the field elevation so that provisions of
para 2-1-6, Safety Alert, and para5-2-17, Validation
of Mode C Readout, subparaa2 may be applied.
Air traffic managers may authorize temporary
suspension of this requirement when target clutter is
excessive.
JO 7110.65S 2/14/08
5-2-10
2/14/08 JO 7110.65S
Radar Identification 5-3-1
Section 3. Radar Identification
5-3-1. APPLICATION
Before you provide radar service, establish and
maintain radar identification of the aircraft involved,
except as provided in para 5-5-1, Application,
subparas b2 and 3.
REFERENCEFAAO
JO 7110.65, Para 3-1-9, Use of Tower Radar Displays.
5-3-2. PRIMARY RADAR IDENTIFICATION
METHODS
Identify a primary or radar beacon target by using one
of the following methods:
a. Observing a departing aircraft target within
1mile of the takeoff runway end at airports with an
operating control tower, provided one of the
following methods of coordination is accomplished.
1. A verbal rolling/boundary notification is
issued for each departure, or
2. A nonverbal rolling/boundary notification is
used for each departure aircraft.
NOTENonverbal
notification can be accomplished via the use of
a manual or electronic “drop tube” or automation.
b. Observing a target whose position with respect
to a fix (displayed on the video map, scribed on the
map overlay, or displayed as a permanent echo) or a
visual reporting point (whose range and azimuth from
the radar antenna has been accurately determined and
made available to the controller) corresponds with a
direct position report received from an aircraft, and
the observed track is consistent with the reported
heading or route of flight. If a TACAN/VORTAC is
located within 6,000 feet of the radar antenna, the
TACAN/VORTAC may be used as a reference fix for
radar identification without being displayed on the
video map or map overlay.
NOTE-
1. Establishment of radar identification through use of
DME position information can be complicated by the fact
that some military TACANs are not collocated with
frequency-paired VORs and might be separated from them
by as much as 31 miles.
2. Visual reporting points used for RADAR identification
are limited to those most used by pilots and whose range
and azimuth have been determined by supervisory
personnel.
c. Observing a target make an identifying turn or
turns of 30 degrees or more, provided the following
conditions are met:
NOTEUse
of identifying turns or headings which would cause the
aircraft to follow normal IFR routes or known VFR flight
paths might result in misidentification. When these
circumstances cannot be avoided, additional methods of
identification may be necessary.
1. Except in the case of a lost aircraft, a pilot
position report is received which assures you that the
aircraft is within radar coverage and within the area
being displayed.
2. Only one aircraft is observed making these
turns.
3. For aircraft operating in accordance with an
IFR clearance, you either issue a heading away from
an area which will require an increased minimum IFR
altitude or have the aircraft climb to the highest
minimum altitude in your area of jurisdiction before
you issue a heading.
REFERENCEFAAO
JO 7110.65, Para 3-1-9, Use of Tower Radar Displays.
FAAO JO 7110.65, Para 5-12-11, Surveillance Unusable.
5-3-3. BEACON IDENTIFICATION
METHODS
When using only Mode 3/A radar beacon to identify
a target, use one of the following methods:
a. Request the aircraft to activate the “IDENT”
feature of the transponder and then observe the
identification display.
NOTE-
1. At facilities where the single‐slash “IDENT” modification
is installed or other decoder modifications have been
made which increase the number of “blooming” target
displays, it will be necessary to exercise additional care to
preclude the possibility of misidentification.
2. TERMINAL. When automated displays are operated in
the analog mode, the “IDENT” return is displayed as a
double slash and the emergency return as a single bloomer
whenever the beacon control head is in the “fail” position.
JO 7110.65S 2/14/08
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