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15.3.3 If, after repeated advisories, the aircraft
proceeds outside the PAR safety limit or if a radical
deviation is observed, the pilot will be advised to
execute a missed approach if not visual.
15.4 Radar service is automatically terminated upon
completion of the approach.
16. ILS Approach
16.1 Communications should be established with the
appropriate FAA control tower or with the FAA FSS
where there is no control tower, prior to starting an
ILS approach. This is in order to receive advisory
information as to the operation of the facility. It is also
recommended that the aural signal of the ILS be
31 JULY 08
AIP ENR 1.5-42
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
monitored during an approach as to assure continued
reception and receipt of advisory information, when
available.
17. ILS/MLS Approaches to Parallel
Runways
17.1 ATC procedures permit ILS instrument
approach operations to dual or triple parallel runway
configurations. ILS/MLS approaches to parallel
runways are grouped into three classes: Parallel
(dependent) ILS/MLS Approaches; Simultaneous
Parallel (independent) ILS/MLS Approaches; and
Simultaneous Close Parallel (independent) ILS
Precision Runway Monitor (PRM) Approaches. (See
FIG ENR 1.5-25.) The classification of a parallel
runway approach procedure is dependent on adjacent
parallel runway centerline separation, ATC
procedures, and airport ATC radar monitoring and
communications capabilities. At some airports one or
more parallel localizer courses may be offset up to
3 degrees. Offset localizer configurations result in
loss of Category II capabilities and an increase in
decision height (50 feet).
17.2 Parallel approach operations demand heightened pilot situational awareness. A thorough
Approach Procedure Chart review should be
conducted with, as a minimum, emphasis on the
following approach chart information: name and
number of the approach, localizer frequency, inbound
localizer/azimuth course, glide slope intercept
altitude, decision height, missed approach instructions, special notes/procedures, and the assigned
runway location/proximity to adjacent runways.
Pilots will be advised that simultaneous ILS/MLS or
simultaneous close parallel ILS PRM approaches are
in use. This information may be provided through the
ATIS.
17.3 The close proximity of adjacent aircraft
conducting simultaneous parallel ILS/MLS and
simultaneous close parallel ILS PRM approaches
mandates strict pilot compliance with all ATC
clearances. ATC assigned airspeeds, altitudes, and
headings must be complied with in a timely manner.
Autopilot coupled ILS/MLS approaches require pilot
knowledge of procedures necessary to comply with
ATC instructions. Simultaneous parallel ILS/MLS
and simultaneous close parallel ILS PRM approaches
necessitate precise localizer tracking to minimize
final monitor controller intervention, and unwanted
No Transgression Zone (NTZ) penetration. In the
unlikely event of a breakout, a vector off the approach
course prior to the decision altitude (DA), ATC will
not assign altitudes lower than the minimum
vectoring altitude. Pilots should notify ATC
immediately if there is a degradation of aircraft or
navigation systems.
17.4 Strict radio discipline is mandatory during
parallel ILS/MLS approach operations. This includes
an alert listening watch and the avoidance of lengthy,
unnecessary radio transmissions. Attention must be
given to proper call sign usage to prevent the
inadvertent execution of clearances intended for
another aircraft. Use of abbreviated call signs must be
avoided to preclude confusion of aircraft with similar
sounding call signs. Pilots must be alert to unusually
long periods of silence or any unusual background
sounds in their radio receiver. A stuck microphone
may block the issuance of ATC instructions by the
final monitor controller during simultaneous parallel
ILS/MLS and simultaneous close parallel ILS PRM
approaches. For additional communications information, pilots should refer to GEN 3.4, paragraph 4.4,
Radio Communications Phraseology and
Techniques.
17.5 Use of Traffic Collision Avoidance Systems
(TCAS) provides an additional element of safety to
parallel approach operations. Pilots should follow
recommended TCAS operating procedures presented
in approved flight manuals, original equipment
manufacturer recommendations, professional newsletters, and FAA publications.
31 JULY 08
AIP ENR 1.5-43
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
FIG ENR 1.5-25
Parallel ILS Approaches
31 JULY 08
AIP ENR 1.5-44
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
FIG ENR 1.5-26
Staggered ILS Approaches
DIAGONAL
SEPARATION
Parallel ILS Approaches
Runway centerlines spaced 2500’ or greater.
Radar monitoring not required.
Staggered Approaches.
18. Parallel ILS/MLS Approaches
(Dependent) (See FIG ENR 1.5-26)
18.1 Parallel approaches are an ATC procedure
permitting parallel ILS/MLS approaches to airports
having parallel runways separated by at least
2,500 feet between centerlines. Integral parts of a
total system are ILS/MLS, radar, communications,
ATC procedures, and required airborne equipment.
18.2 A parallel (dependent) approach differs from a
simultaneous (independent) approach in that, the
minimum distance between parallel runway centerlines is reduced; there is no requirement for radar
monitoring or advisories; and a staggered separation
of aircraft on the adjacent localizer/azimuth course is
required.
18.3 Aircraft are afforded a minimum of 1.5 miles
radar separation diagonally between successive
aircraft on the adjacent localizer/azimuth course
when runway centerlines are at least 2,500 feet but no
more than 4,300 feet apart. When runway centerlines
are more than 4,300 feet but no more than 9,000 feet
apart, a minimum of 2 miles diagonal radar separation
is provided. Aircraft on the same localizer/azimuth
course within 10 miles of the runway end are
provided a minimum of 2.5 miles radar separation. In
addition, a minimum of 1,000 feet vertical or a
minimum of three miles radar separation is provided
between aircraft during turn on to the parallel final
approach course.
31 JULY 08
AIP ENR 1.5-45
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
FIG ENR 1.5-27
Simultaneous Parallel ILS Approaches
NO TRANSGRESSION ZONE
2200’
2200’
2200’
2200’
OM
OM
INTERCEPT GLIDE
SLOPE AT 2200’
3200’
3200’
EXTEND RADAR MONITORING AND NTZ TO 7NM BEYOND RUNWAY
DEPARTURE END FOR QUADRUPLE SIMULTANEOUS ILS APPROACHES.
7NM
14L
14R
RADAR MONITORING
PROVIDED TO
ENSURE SEPARATION
BETWEEN AIRCRAFT ON
PARALLEL LOCALIZERS.
AIRCRAFT MAY BE
VECTORED TO EITHER
14L OR 14R ILS
FROM OUTER FIX.
MEADOWVIEW INT (NW COURSE OHA ILS &
OBK VOR R-227) ESTABLISHED WHERE
3200’ ALTITUDE INTERCEPTS GLIDE SLOPE.
RADAR MONITORING PROVIDED TO ENSURE SEPARATION
BETWEEN AIRCRAFT ON PARALLEL LOCALIZERS. WHEN GLIDE
SLOPE INOPERATIVE BEGIN DESCENT AT MEADOW INTERSECTION.
(RUNWAY CENTERLINES SPACED 4300’ OR MORE [DUAL RUNWAYS]
OR 5000’ OR MORE, [TRIPLE OR QUADRUPLE RUNWAYS] - RADAR MONITORING REQUIRED)
18.4 Whenever parallel ILS/MLS approaches are in
progress, pilots are informed that approaches to both
runways are in use. In addition, the radar controller
will have the interphone capability of communicating
with the tower controller where separation responsibility has not been delegated to the tower.
19. Simultaneous Parallel ILS/MLS
Approaches (Independent)
(See FIG ENR 1.5-27)
19.1 System. This approach system permits simultaneous ILS/MLS approaches to parallel runways
with centerlines separated by 4,300 to 9,000 feet, and
equipped with final monitor controllers. Simultaneous parallel ILS/MLS approaches require radar
monitoring to ensure separation between aircraft on
the adjacent parallel approach course. Aircraft
position is tracked by final monitor controllers who
will issue instructions to aircraft observed deviating
from the assigned localizer course. Staggered radar
separation procedures are not utilized. Integral parts
of a total system are ILS/MLS, radar, communications, ATC procedures, and required airborne
equipment. The Approach Procedure Chart permitting simultaneous parallel ILS/MLS approaches will
contain the note “simultaneous approaches authorized RWYS 14L and 14R,” identifying the
appropriate runways as the case may be. When
advised that simultaneous parallel ILS/MLS approaches are in progress, pilots shall advise approach
control immediately of malfunctioning or inoperative
receivers, or if a simultaneous parallel ILS/MLS
approach is not desired.
31 JULY 08
AIP ENR 1.5-46
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
19.2 Radar Monitoring. This service is provided
for each simultaneous parallel ILS/MLS approach to
ensure aircraft do not deviate from the final approach
course. Radar monitoring includes instructions if an
aircraft nears or penetrates the prescribed NTZ (an
area 2,000 feet wide located equidistant between
parallel final approach courses). This service will be
provided as follows:
19.2.1 During turn on to parallel final approach,
aircraft will be provided 3 miles radar separation or
a minimum or 1,000 feet vertical separation. The
assigned altitude must be maintained until intercepting the glide path, unless cleared otherwise by ATC.
Aircraft will not be vectored to intercept the final
approach course at an angle greater than thirty
degrees.
19.2.2 The final monitor controller will have the
capability of overriding the tower controller on the
tower frequency.
19.2.3 Pilots will be instructed to monitor the tower
frequency to receive advisories and instructions.
19.2.4 Aircraft observed to overshoot the turn-on or
to continue on a track which will penetrate the NTZ
will be instructed to return to the correct final
approach course immediately. The final monitor
controller may also issue missed approach or
breakout instructions to the deviating aircraft.
PHRASEOLOGY-
“(Aircraft call sign) YOU HAVE CROSSED THE FINAL
APPROACH COURSE. TURN (left/right) IMMEDIATE-
LY AND RETURN TO THE LOCALIZER/AZIMUTH
COURSE.”
or
“(Aircraft call sign) TURN (left/right) AND RETURN TO
THE LOCALIZER/AZIMUTH COURSE.”
19.2.5 If a deviating aircraft fails to respond to such
instructions or is observed penetrating the NTZ, the
aircraft on the adjacent final approach course may be
instructed to alter course.
PHRASEOLOGY-
“TRAFFIC ALERT (aircraft call sign) TURN (left/right)
IMMEDIATELY HEADING (degrees), (climb/descend)
AND MAINTAIN (altitude).”
19.2.6 Radar monitoring will automatically be
terminated when visual separation is applied, the
aircraft reports the approach lights or runway in sight,
or the aircraft is 1 mile or less from the runway
threshold (for runway centerlines spaced 4,300 feet
or greater). Final monitor controllers will not advise
pilots when radar monitoring is terminated.
31 JULY 08
AIP ENR 1.5-47
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
FIG ENR 1.5-28
ILS PRM Approaches
(Simultaneous Close Parallel)
20. Simultaneous Close Parallel ILS PRM
Approaches (Independent) and
Simultaneous Offset Instrument
Approaches (SOIA) (See FIG ENR 1.5-28)
20.1 System
20.1.1 ILS/PRM is an acronym for Instrument
Landing System/Precision Runway Monitor.
20.1.1.1 An approach system that permits simultaneous ILS/PRM approaches to dual runways with
centerlines separated by less than 4,300 feet but at
least 3,400 feet for parallel approach courses, and at
least 3,000 feet if one ILS if offset by 2.5 to
3.0 degrees. The airspace between the final approach
courses contains a No Transgression Zone (NTZ)
with surveillance provided by two PRM monitor
controllers, one for each approach course. To qualify
for reduced lateral runway separation, monitor
controllers must be equipped with high update radar
and high resolution ATC radar displays, collectively
called a PRM system. The PRM system displays
almost instantaneous radar information. Automated
tracking software provides PRM monitor controllers
with aircraft identification, position, speed and a
ten-second projected position, as well as visual and
aural controller alerts. The PRM system is a
supplemental requirement for simultaneous close
parallel approaches in addition to the system
requirements for simultaneous parallel ILS/MLS
approaches described in paragraph 19, Simultaneous
Parallel ILS/MLS Approaches (Independent).
31 JULY 08
AIP ENR 1.5-48
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
20.1.1.2 Simultaneous close parallel ILS/PRM
approaches are depicted on a separate Approach
Procedure Chart titled ILS/PRM Rwy XXX
(Simultaneous Close Parallel).
20.1.2 SOIA is an acronym for Simultaneous Offset
Instrument Approach, a procedure used to conduct
simultaneous approaches to runways spaced less than
3,000 feet, but at least 750 feet apart. The SOIA
procedure utilizes an ILS/PRM approach to one
runway and an offset Localizer Type Directional Aid
(LDA)/PRM approach with glide slope to the
adjacent runway.
20.1.2.1 The ILS/PRM approach plates used in
SOIA operations are identical to other ILS/PRM
approach plates, with an additional note, which
provides the separation between the two runways
used for simultaneous approaches. The LDA/PRM
approach plate displays the required notations for
closely spaced approaches as well as depicting the
visual segment of the approach, and a note that
provides the separation between the two runways
used for simultaneous operations.
20.1.2.2 Controllers monitor the SOIA ILS/PRM
and LDA/PRM approaches with a PRM system using
high update radar and high-resolution ATC radar
displays in exactly the same manner as is done for
ILS/PRM approaches. The procedures and system
requirements for SOIA ILS/PRM and LDA/PRM
approaches are identical with those used for
simultaneous close parallel ILS/PRM approaches
until near the LDA/PRM approach missed approach
point (MAP)---where visual acquisition of the ILS
aircraft by the LDA aircraft must be accomplished.
Since the ILS/PRM and LDA/PRM approaches are
identical except for the visual segment in the SOIA
concept, an understanding of the procedures for
conducting ILS/PRM approaches is essential before
conducting a SOIA ILS/PRM or LDA/PRM
operation.
20.1.2.3 In SOIA, the approach course separation
(instead of the runway separation) meets established
close parallel approach criteria. Refer to
FIG ENR 1.5-28 for the generic SOIA approach
geometry. A visual segment of the LDA/PRM
approach is established between the LDA MAP and
the runway threshold. Aircraft transition in visual
conditions from the LDA course, beginning at the
LDA MAP, to align with the runway and can be
stabilized by 500 feet above ground level (AGL) on
the extended runway centerline. Aircraft will be
“paired” in SOIA operations, with the ILS aircraft
ahead of the LDA aircraft prior to the LDA aircraft
reaching the LDA MAP. A cloud ceiling for the
approach is established so that the LDA aircraft has
nominally 30 seconds to acquire the leading ILS
aircraft prior to the LDA aircraft reaching the LDA
MAP. If visual acquisition is not accomplished, a
missed approach must be executed.
20.2 Requirements.
20.2.1 Besides system requirements as identified in
subpara 20.1 above all pilots must have completed
special training before accepting a clearance to
conduct ILS/PRM or LDA/PRM Simultaneous Close
Parallel Approaches.
20.2.1.1 Pilot Training Requirement. Pilots must
complete special pilot training, as outlined below,
before accepting a clearance for a simultaneous close
parallel ILS/PRM or LDA/PRM approach.
a) For operations under 14 CFR Parts 121, 129,
and 135 pilots must comply with FAA approved
company training as identified in their Operations
Specifications. Training, at a minimum, must require
pilots to view the FAA video “ILS PRM AND SOIA
APPROACHES: INFORMATION FOR AIR CAR-
RIER PILOTS.” Refer to http://www.faa.gov for
additional information and to view or download the
video.
b) For operations under Part 91:
1) Pilots operating transport category aircraft
must be familiar with PRM operations as contained in
this section of the Aeronautical Information
Publication (AIP). In addition, pilots operating
transport category aircraft must view the FAA video
“ILS PRM AND SOIA APPROACHES:
INFORMATION FOR AIR CARRIER PILOTS.”
Refer to http://www.faa.gov for additional
information and to view or download the video.
2) Pilots not operating transport category
aircraft must be familiar with PRM and SOIA
operations as contained in this section of the AIP. The
FAA strongly recommends that pilots not involved in
transport category aircraft operations view the FAA
video, “ILS PRM AND SOIA APPROACHES:
INFORMATION FOR GENERAL AVIATION
PILOTS.” Refer to http://www.faa.gov for additional information and to view or download the video.
31 JULY 08
AIP ENR 1.5-49
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
FIG ENR 1.5-29
SOIA Approach Geometry
NOTE-
SAP The SAP is a design point along the extended centerline of the intended landing runway on the
glide slope at 500 feet above the landing threshold. It is used to verify a sufficient distance is
provided for the visual maneuver after the missed approach point (MAP) to permit the pilots to
conform to approved, stabilized approach criteria.
MAP The point along the LDA where the course separation with the adjacent ILS reaches 3,000 feet.
The altitude of the glide slope at that point determines the approach minimum descent altitude
and is where the NTZ terminates. Maneuvering inside the MAP is done in visual conditions.
Angle Angle formed at the intersection of the extended LDA runway centerline and a line drawn between
the LDA MAP and the SAP. The size of the angle is determined by the FAA SOIA computer design
program, and is dependent on whether Heavy aircraft use the LDA and the spacing between the
runways.
Visibility Distance from MAP to runway threshold in statute miles (light credit applies).
Procedure LDA aircraft must see the runway landing environment and, if less than standard radar
separation exists between the aircraft on the adjacent ILS course, the LDA aircraft must visually
acquire the ILS aircraft and report it in sight to ATC prior to the LDA MAP.
CC Clear Clouds.
31 JULY 08
AIP ENR 1.5-50
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
20.2.1.2 ATC Directed Breakout. An ATC
directed “breakout” is defined as a vector off the ILS
or LDA approach course in response to another
aircraft penetrating the NTZ, the 2,000 foot wide area
located equidistance between the two approach
courses that is monitored by the PRM monitor
controllers.
20.2.1.3 Dual Communications. The aircraft flying the ILS/PRM or LDA/PRM approach must have
the capability of enabling the pilot/s to listen to two
communications frequencies simultaneously.
20.3 Radar Monitoring. Simultaneous close parallel ILS/PRM and LDA/PRM approaches require
that final monitor controllers utilize the PRM system
to ensure prescribed separation standards are met.
Procedures and communications phraseology are
also described in paragraph 19, Simultaneous Parallel
ILS/MLS Approaches (Independent). A minimum of
3 miles radar separation or 1,000 feet vertical
separation will be provided during the turn-on to
close parallel final approach courses. To ensure
separation is maintained, and in order to avoid an
imminent situation during simultaneous close
parallel ILS/PRM or SOIA ILS/PRM and LDA/PRM
approaches, pilots must immediately comply with
PRM monitor controller instructions. In the event of
a missed approach, radar monitoring is provided to
one-half mile beyond the most distant of the two
runway departure ends for ILS/RPM approaches. In
SOIA, PRM radar monitoring terminates at the LDA
MAP. Final monitor controllers will not notify pilots
when radar monitoring is terminated.
20.4 Attention All Users Page (AAUP). ILS/PRM
and LDA/PRM approach charts have an AAUP
associated with them that must be referred to in
preparation for conducting the approach. This page
contains the following instructions that must be
followed if the pilot is unable to accept an ILS/PRM
or LDA/PRM approach.
20.4.1 At airports that conduct PRM operations,
(ILS/PRM or, in the case of airports where SOIAs are
conducted, ILS/PRM and LDA/PRM approaches)
pilots not qualified to except PRM approaches must
contact the FAA Command Center prior to departure
(1-800-333-4286) to obtain an arrival reservation
(see FAA Advisory Circular 90-98, Simultaneous
Closely Spaced Parallel Operations at Airports Using
Precision Runway Monitor (PRM) Systems). Arriving flights that are unable to participate in ILS/PRM
or LDA/PRM approaches and have not received an
arrival reservation are subject to diversion to another
airport or delays. Pilots en route to a PRM airport
designated as an alternate, unable to reach their filed
destination, and who are not qualified to participate
in ILS/PRM or LDA/PRM approaches must advise
ATC as soon as practical that they are unable to
participate. Pilots who are qualified to participate but
experience an en route equipment failure that would
preclude participation in PRM approaches should
notify ATC as soon as practical.
20.4.2 The AAUP covers the following operational
topics:
20.4.2.1 ATIS. When the ATIS broadcast advises
ILS/PRM approaches are in progress (or ILS PRM
and LDA PRM approaches in the case of SOIA),
pilots should brief to fly the ILS/PRM or LDA/PRM
approach. If later advised to expect the ILS or LDA
approach (should one be published), the ILS/PRM or
LDA/PRM chart may be used after completing the
following briefing items:
a) Minimums and missed approach procedures are
unchanged.
b) PRM Monitor frequency no longer required.
c) ATC may assign a lower altitude for glide slope
intercept.
NOTE-
In the case of the LDA/PRM approach, this briefing
procedure only applies if an LDA approach is also
published.
In the case of the SOIA ILS/PRM and LDA/PRM
procedure, the AAUP describes the weather
conditions in which simultaneous approaches are
authorized:
Simultaneous approach weather minimums are
X,XXX feet (ceiling), x miles (visibility).
20.4.2.2 Dual VHF Communications Required.
To avoid blocked transmissions, each runway will
have two frequencies, a primary and a monitor
frequency. The tower controller will transmit on both
frequencies. The monitor controller’s transmissions,
if needed, will override both frequencies. Pilots will
ONLY transmit on the tower controller’s frequency,
but will listen to both frequencies. Begin to monitor
the PRM monitor controller when instructed by ATC
to contact the tower. The volume levels should be set
about the same on both radios so that the pilots will
be able to hear transmissions on at least one frequency
31 JULY 08
AIP ENR 1.5-51
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
if the other is blocked. Site specific procedures take
precedence over the general information presented in
this paragraph. Refer to the AAUP for applicable
procedures at specific airports.
20.4.2.3 Breakouts. Breakouts differ from other
types of abandoned approaches in that they can
happen anywhere and unexpectedly. Pilots directed
by ATC to break off an approach must assume that an
aircraft is blundering toward them and a breakout
must be initiated immediately.
a) Hand-fly breakouts. All breakouts are to be
hand-flown to ensure the maneuver is accomplished
in the shortest amount of time.
b) ATC Directed “Breakouts.” ATC directed
breakouts will consist of a turn and a climb or descent.
Pilots must always initiate the breakout in response to
an air traffic controller’s instruction. Controllers will
give a descending breakout only when there are no
other reasonable options available, but in no case will
the descent be below the minimum vectoring altitude
(MVA) which provides at least 1,000 feet required
obstruction clearance. The AAUP provides the MVA
in the final approach segment as X,XXX feet at
(Name) Airport.
NOTE-
“TRAFFIC ALERT.” If an aircraft enters the “NO
TRANSGRESSION ZONE” (NTZ), the controller will
breakout the threatened aircraft on the adjacent approach.
The phraseology for the breakout will be:
PHRASEOLOGY-
TRAFFIC ALERT, (aircraft call sign) TURN (left/right)
IMMEDIATELY, HEADING (degrees), CLIMB/
DESCEND AND MAINTAIN (altitude).
20.4.2.4 ILS/PRM Navigation. The pilot may find
crossing altitudes along the final approach course.
The pilot is advised that descending on the ILS
glideslope ensures complying with any charted
crossing restrictions.
20.4.2.5 SOIA AAUP differences from ILS PRM
AAUP
a) ILS/PRM LDA Traffic (only published on
ILS/PRM AAUP when the ILS PRM approach is
used in conjunctions with an LDA/PRM approach
to the adjacent runway). To provide better
situational awareness, and because traffic on the LDA
may be visible on the ILS aircraft’s TCAS, pilots are
reminded of the fact that aircraft will be maneuvering
behind them to align with the adjacent runway. While
conducting the ILS/PRM approach to Runway XXX,
other aircraft may be conducting the offset
LDA/PRM approach to Runway XXX. These aircraft
will approach from the (left/right)-rear and will
realign with runway XXX after making visual contact
with the ILS traffic. Under normal circumstances
these aircraft will not pass the ILS traffic.
b) SOIA LDA/PRM AAUP Items. The AAUP
for the SOIA LDA/PRM approach contains most
information found on ILS/PRM AAUPs. It replaces
certain information as seen below and provides pilots
with the procedures to be used in the visual segment
of the LDA/PRM approach, from the time the ILS
aircraft is visually acquired until landing.
c) SOIA LDA/PRM Navigation (replaces ILS/
PRM 20.4.2.4 and 20.4.2.5a) above). The pilot may
find crossing altitudes along the final approach
course. The pilot is advised that descending on the
LDA glideslope ensures complying with any charted
crossing restrictions. Remain on the LDA course
until passing XXXXX (LDA MAP name) intersection prior to maneuvering to align with the centerline
of runway XXX.
d) SOIA (Name) Airport Visual Segment
(replaces ILS/PRM 20.4.2.5a) above). Pilot procedures for navigating beyond the LDA MAP are
spelled out. If ATC advises that there is traffic on the
adjacent ILS, pilots are authorized to continue past
the LDA MAP to align with runway centerline when:
1) the ILS traffic is in sight and is expected to
remain in sight,
2) ATC has been advised that “traffic is in
sight.”
3) the runway environment is in sight.
Otherwise, a missed approach must be executed.
Between the LDA MAP and the runway threshold,
pilots of the LDA aircraft are responsible for
separating themselves visually from traffic on the ILS
approach, which means maneuvering the aircraft as
necessary to avoid the ILS traffic until landing, and
providing wake turbulence avoidance, if applicable.
Pilots should advise ATC, as soon as practical, if
visual contact with the ILS traffic is lost and execute
a missed approach unless otherwise instructed by
ATC.
31 JULY 08
AIP ENR 1.5-52
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
20.5 SOIA LDA Approach Wake Turbulence.
Pilots are responsible for wake turbulence avoidance
when maneuvering between the LDA missed
approach point and the runway threshold.
20.6 Differences between ILS and ILS/PRM
approaches of importance to the pilot.
20.6.1 Runway Spacing. Prior to ILS/PRM and
LDA/PRM approaches, most ATC directed breakouts
were the result of two aircraft in-trail on the same
final approach course getting too close together.
Two aircraft going in the same direction did not
mandate quick reaction times. With PRM approaches, two aircraft could be along side each other,
navigating on courses that are separated by less than
4,300 feet. In the unlikely event that an aircraft
“blunders” off its course and makes a worst case turn
of 30 degrees toward the adjacent final approach
course, closing speeds of 135 feet per second could
occur that constitute the need for quick reaction. A
blunder has to be recognized by the monitor
controller, and breakout instructions issued to the
endangered aircraft. The pilot will not have any
warning that a breakout is eminent because the
blundering aircraft will be on another frequency. It is
important that, when a pilot receives breakout
instructions, he/she assumes that a blundering aircraft
is about to or has penetrated the NTZ and is heading
toward his/her approach course. The pilot must
initiate a breakout as soon as safety allows. While
conducting PRM approaches, pilots must maintain an
increased sense of awareness in order to immediately
react to an ATC instruction (breakout) and maneuver
as instructed by ATC, away from a blundering
aircraft.
20.6.2 Communications. To help in avoiding
communication problems caused by stuck microphones and two parties talking at the same time,
two frequencies for each runway will be in use during
ILS/PRM and LDA/PRM approach operations, the
primary tower frequency and the PRM monitor
frequency. The tower controller transmits and
receives in a normal fashion on the primary frequency
and also transmits on the PRM monitor frequency.
The monitor controller’s transmissions override on
both frequencies. The pilots flying the approach will
listen to both frequencies but only transmit on the
primary tower frequency. If the PRM monitor
controller initiates a breakout and the primary
frequency is blocked by another transmission, the
breakout instruction will still be heard on the PRM
monitor frequency.
20.6.3 Hand-flown Breakouts. The use of the
autopilot is encouraged while flying an ILS/PRM or
LDA/PRM approach, but the autopilot must be
disengaged in the rare event that a breakout is issued.
Simulation studies of breakouts have shown that a
hand-flown breakout can be initiated consistently
faster than a breakout performed using the autopilot.
20.6.4 TCAS. The ATC breakout instruction is the
primary means of conflict resolution. TCAS, if
installed, provides another form of conflict resolution
in the unlikely event other separation standards
would fail. TCAS is not required to conduct a closely
spaced approach.
The TCAS provides only vertical resolution of
aircraft conflicts, while the ATC breakout instruction
provides both vertical and horizontal guidance for
conflict resolutions. Pilots should always immediately follow the TCAS Resolution Advisory (RA),
whenever it is received. Should a TCAS RA be
received before, during, or after an ATC breakout
instruction is issued, the pilot should follow the RA,
even if it conflicts with the climb/descent portion of
the breakout maneuver. If following an RA requires
deviating from an ATC clearance, the pilot shall
advise ATC as soon as practical. While following an
RA, it is extremely important that the pilot also
comply with the turn portion of the ATC breakout
instruction unless the pilot determines safety to be
factor. Adhering to these procedures assures the pilot
that acceptable “breakout” separation margins will
always be provided, even in the face of a normal
procedural or system failure.
20.6.5 Breakouts. The probability is extremely low
that an aircraft will “blunder” from its assigned
approach course and enter the NTZ, causing ATC to
“breakout” the aircraft approaching on the adjacent
ILS course. However, because of the close proximity
of the final approach courses, it is essential that pilots
follow the ATC breakout instructions precisely and
expeditiously. The controller’s “breakout” instructions provide conflict resolution for the threatened
aircraft, with the turn portion of the “breakout” being
the single most important element in achieving
maximum protection. A descending breakout will
only be issued when it is the only controller option. In
no case will the controller descend an aircraft below
the MVA, which will provide at least 1,000 feet
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United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
clearance above obstacles. The pilot is not expected
to exceed 1,000 feet per minute rate of descent in the
event a descending breakout is issued.
21. Simultaneous Converging Instrument
Approaches
21.1 ATC may conduct instrument approaches
simultaneously to converging runways; i.e., runways
having an included angle from 15 to 100 degrees, at
airports where a program has been specifically
approved to do so.
21.2 The basic concept requires that dedicated,
separate standard instrument approach procedures be
developed for each converging runway included.
Missed approach points must be at least 3 miles apart
and missed approach procedures ensure that missed
approach protected airspace does not overlap.
21.3 Other requirements are: radar availability,
nonintersecting final approach courses, precision
(ILS/MLS) approach systems on each runway, and if
runways intersect, controllers must be able to apply
visual separation as well as intersecting runway
separation criteria. Intersecting runways also require
minimums of at least 700-foot ceilings and 2 miles
visibility. Straight-in approaches and landings must
be made.
21.4 Whenever simultaneous converging approaches are in progress, aircraft will be informed by
the controller as soon as feasible after initial contact
or via ATIS. Additionally, the radar controller will
have direct communications capability with the tower
controller where separation responsibility has not
been delegated to the tower.
22. Timed Approaches From a Holding Fix
22.1 Timed approaches may be conducted when the
following conditions are met:
22.1.1 A control tower is in operation at the airport
where the approaches are conducted.
22.1.2 Direct communications are maintained
between the pilot and the center/approach controller
until the pilot is instructed to contact the tower.
22.1.3 If more than one missed approach procedure
is available, none requires a course reversal.
22.1.4 If only one missed approach procedure is
available, the following conditions are met.
22.1.4.1 Course reversal is not required.
22.1.4.2 Reported ceiling and visibility are equal to
or greater than the highest prescribed circling
minimums for the instrument approach procedure.
22.1.5 When cleared for the approach, pilots shall
not execute a procedure turn. (See 14 CFR
Section 91.175j.)
22.2 Although the controller will not specifically
state that “timed approaches are in progress,” the
assigning a time to depart the final approach fix
inbound (nonprecision approach) or the outer marker
or the fix used in lieu of the outer marker inbound
(precision approach) is indicative that timed
approach procedures are being utilized, or in lieu of
holding, the controller may use radar vectors to the
final approach course to establish a mileage interval
between aircraft that will insure the appropriate time
sequence between the final approach fix/outer marker
or the fix used in lieu of the outer marker and the
airport.
22.3 Each pilot in an approach sequence will be
given advance notice as to the time he/she should
leave the holding point on approach to the airport.
When a time to leave the holding point has been
received, the pilot should adjust his/her flight path to
leave the fix as closely as possible to the designated
time. (See FIG ENR 1.5-30.)
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AIP ENR 1.5-54
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
FIG ENR 1.5-30
Timed Approaches from a Holding Fix
ONE MINUTE
FLYING TIME
APPROXIMATELY 5 MILES
12:03 CLEARANCE RECEIVED
:04 INITIAL TIME
OVER FIX
1000 FT.
1000 FT.
1000 FT.
1000 FT.
:06 1/2
:07 REPORT
LEAVING FINAL
APPROACH TIME
:05 1/2
:05
30 SEC.
REPORT LEAVING
PREVIOUS ALTITUDE FOR
NEW ASSIGNED ALTITUDE
LMM LOM
AIRPORT
EXAMPLE-
At 12:03 local time, in the example shown, a pilot holding, receives instructions to leave the fix inbound at 12:07. These
instructions are received just as the pilot has completed turn at the outbound end of the holding pattern and is proceeding
inbound toward the fix. Arriving back over the fix, the pilot notes that the time is 12:04 and that there are 3 minutes to lose
in order to leave the fix at the assigned time. Since the time remaining is more than two minutes, the pilot plans to fly a race
track pattern rather than a 360 degree turn, which would use up 2 minutes. The turns at the ends of the race track pattern
will consume approximately 2 minutes. Three minutes to go, minus 2 minutes required for the turns, leaves 1 minute for level
flight. Since two portions of level flight will be required to get back to the fix inbound, the pilot halves the 1 minute remaining
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AIP ENR 1.5-55
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
and plans to fly level for 30 seconds outbound before starting the turn back to the fix on final approach. If the winds were
negligible at flight altitude, this procedure would bring the pilot inbound across the fix precisely at the specified time of
12:07. However, if expecting headwind on final approach, the pilot should shorten the 30 second outbound course somewhat,
knowing that the wind will carry the aircraft away from the fix faster while outbound and decrease the ground speed while
returning to the fix. On the other hand, compensating for a tailwind on final approach, the pilot should lengthen the
calculated 30 second outbound heading somewhat, knowing that the wind would tend to hold the aircraft closer to the fix
while outbound and increase the ground speed while returning to the fix.
23. Contact Approach
23.1 Pilots operating in accordance with an IFR
flight plan, provided they are clear of clouds and have
at least 1 mile flight visibility and can reasonably
expect to continue to the destination airport in those
conditions, may request ATC authorization for a
“contact approach.”
23.2 Controllers may authorize a “contact approach”
provided:
23.2.1 The contact approach is specifically requested by the pilot. ATC cannot initiate this
approach.
EXAMPLE-
Request contact approach.
23.2.2 The reported ground visibility at the
destination airport is at least 1 statute mile.
23.2.3 The contact approach will be made to an
airport having a standard or special instrument
approach procedure.
23.2.4 Approved separation is applied between
aircraft so cleared and between these aircraft and
other IFR or special VFR aircraft.
EXAMPLE-
Cleared contact approach (and if required) at or below
(altitude) (routing) if not possible (alternative procedures)
and advise.
23.3 A contact approach is an approach procedure
that may be used by a pilot (with prior authorization
from ATC) in lieu of conducting a standard or special
instrument approach procedure (IAP) to an airport. It
is not intended for use by a pilot on an IFR flight
clearance to operate to an airport not having a
published and functioning IAP. Nor is it intended for
an aircraft to conduct an instrument approach to one
airport and then, when “in the clear,” discontinue that
approach and proceed to another airport. In the
execution of a contact approach, the pilot assumes the
responsibility for obstruction clearance. If radar
service is being received, it will automatically
terminate when the pilot is instructed to change to
advisory frequency. |
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