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21. Precision Approach Systems Other
Than ILS, GLS, and MLS
21.1 General
Approval and use of precision approach systems
other than ILS, GLS, and MLS require the issuance
of special instrument approach procedures.
21.2 Special Instrument Approach Procedure
21.2.1 Special instrument approach procedures must
be issued to the aircraft operator if pilot training,
aircraft equipment, and/or aircraft performance is
different than published procedures. Special instrument approach procedures are not distributed for
general public use. These procedures are issued to an
aircraft operator when the conditions for operations
approval are satisfied.
21.2.2 General aviation operators requesting approval for special procedures should contact the local
Flight Standards District Office to obtain a letter of
authorization. Air carrier operators requesting
approval for use of special procedures should contact
their Certificate Holding District Office for authorization through their Operations Specification.
21.3 Transponder Landing System (TLS)
21.3.1 The TLS is designed to provide approach
guidance utilizing existing airborne ILS localizer,
glide slope, and transponder equipment.
21.3.2 Ground equipment consists of a transponder
interrogator, sensor arrays to detect lateral and
vertical position, and ILS frequency transmitters. The
TLS detects the aircraft’s position by interrogating its
transponder. It then broadcasts ILS frequency signals
to guide the aircraft along the desired approach path.
21.3.3 TLS instrument approach procedures are
designated Special Instrument Approach Procedures.
Special aircrew training is required. TLS ground
equipment provides approach guidance for only one
aircraft at a time. Even though the TLS signal is
received using the ILS receiver, no fixed course or
glidepath is generated. The concept of operation is
very similar to an air traffic controller providing radar
vectors, and just as with radar vectors, the guidance
is valid only for the intended aircraft. The TLS
ground equipment tracks one aircraft, based on its
transponder code, and provides correction signals to
course and glidepath based on the position of the
tracked aircraft. Flying the TLS corrections computed for another aircraft will not provide guidance
31 JULY 08
AIP ENR 4.1-39
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
relative to the approach; therefore, aircrews must not
use the TLS signal for navigation unless they have
received approach clearance and completed the
required coordination with the TLS ground equipment operator. Navigation fixes based on
conventional NAVAIDs or GPS are provided in the
special instrument approach procedure to allow
aircrews to verify the TLS guidance.
21.4 Special Category I Differential GPS
(SCAT-I DGPS)
21.4.1 The SCAT-I DGPS is designed to provide
approach guidance by broadcasting differential
correction to GPS.
21.4.2 SCAT-I DGPS procedures require aircraft
equipment and pilot training.
21.4.3 Ground equipment consists of GPS receivers
and a VHF digital radio transmitter. The SCAT-I
DGPS detects the position of GPS satellites relative
to GPS receiver equipment and broadcasts differential corrections over the VHF digital radio.
21.4.4 Category I Ground Based Augmentation
System (GBAS) will displace SCAT-I DGPS as the
public-use service.
22. Area Navigation
22.1 General
22.1.1 Area Navigation (RNAV) provides enhanced
navigational capability to the pilot. RNAV equipment
can compute the airplane position, actual track and
ground speed and then provide meaningful information relative to a route of flight selected by the pilot.
Typical equipment will provide the pilot with
distance, time, bearing and crosstrack error relative to
the selected “TO” or “active” waypoint and the
selected route. Several navigational systems with
different navigational performance characteristics
are capable of providing area navigational functions.
Present day RNAV includes INS, LORAN, VOR/
DME, and GPS systems. Modern multi-sensor
systems can integrate one or more of the above
systems to provide a more accurate and reliable
navigational system. Due to the different levels of
performance, area navigational capabilities can
satisfy different levels of required navigation
performance (RNP).
22.2 RNAV Operations Incorporating RNP
22.2.1 During the past four decades, domestic and
international air navigation have been conducted
using a system of airways and instrument procedures
based upon ground-based navigational systems such
as NDB, VOR, and ILS. Reliance on ground-based
navigational systems has served the aviation
community well, but often results in less than optimal
routes or instrument procedures and an inefficient use
of airspace. With the widespread deployment of
RNAV systems and the advent of GPS-based
navigation, greater flexibility in defining routes,
procedures, and airspace design is now possible with
an associated increase in flight safety. To capitalize
on the potential of RNAV systems, both the FAA and
International Civil Aviation Organization (ICAO) are
affecting a shift toward a new standard of navigation
and airspace management called RNP.
22.2.2 Navigational systems are typically described
as being sensor specific, such as a VOR or ILS
system. By specifying airspace requirements as RNP,
various navigation systems or combination of
systems may be used as long as the aircraft can
achieve the RNP. RNP is intended to provide a single
performance standard that can be used and applied by
aircraft and aircraft equipment manufacturers,
airspace planners, aircraft certification and operations, pilots and controllers, and international
aviation authorities. RNP can be applied to obstacle
clearance or aircraft separation requirements to
ensure a consistent application level.
22.2.3 ICAO has defined RNP values for the four
typical navigation phases of flight: oceanic, en route,
terminal, and approach. The RNP applicable to a
selected airspace, route, or procedure is designated by
it’s RNP Level or Type. As defined in the
Pilot/Controller Glossary, the RNP Level or Type is
a value typically expressed as a distance, in nautical
miles, from the procedure, route or path within which
an aircraft would typically operate. RNP applications
also provide performance to protect against larger
errors at some multiple of RNP level (e.g., twice the
RNP level).
31 JULY 08
AIP ENR 4.1-40
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
22.3 Standard RNP Levels
22.3.1 U.S. standard values supporting typical RNP
airspace are as specified in TBL ENR 4.1-6 below.
Other RNP levels as identified by ICAO, other states
and the FAA may also be used.
TBL ENR 4.1-6
U.S. Standard RNP Levels
RNP Level Typical Application
.3 Approach
1 Departure, Terminal
2 En Route
22.3.1.1 Application of Standard RNP Levels.
U.S. standard levels of RNP typically used for
various routes and procedures supporting RNAV
operations may be based on use of a specific
navigational system or sensor such as GPS, or on
multi-sensor RNAV systems having suitable performance. New RNAV routes and procedures will be
FAA’s first public use procedures to include a
specified RNP level. These procedures are being
developed based on earth referenced navigation and
do not rely on conventional ground-based navigational aids. Unless otherwise noted on affected charts
or procedures, depiction of a specified RNP level will
not preclude the use of other airborne RNAV
navigational systems.
22.3.1.2 Depiction of Standard RNP Levels. The
applicable RNP level will be depicted on affected
charts and procedures. For example, an RNAV
departure procedure may contain a notation referring
to eligible aircraft by equipment suffix and a phrase
“or RNP-1.0.” A typical RNAV approach procedure
may include a notation referring to eligible aircraft by
specific navigation sensor(s), equipment suffix, and
a phrase “or RNP-0.3.” Specific guidelines for the
depiction of RNP levels will be provided through
chart bulletins and accompany affected charting
changes.
22.4 Aircraft and Airborne Equipment Eligibility for RNP Operations. Aircraft meeting RNP
criteria will have an appropriate entry including
special conditions and limitations, if any, in its
Aircraft/Rotorcraft Flight Manual (AFM), or supplement. RNAV installations with AFM-RNP
certification based on GPS or systems integrating
GPS are considered to meet U.S. standard RNP levels
for all phases of flight. Aircraft with AFM-RNP
certification without GPS may be limited to certain
RNP levels, or phases of flight. For example, RNP
based on DME/DME without other augmentation
may not be appropriate for phases of flight outside the
certified DME service volume. Operators of aircraft
not having specific AFM-RNP certification may be
issued operational approval including special conditions and limitations, if any, for specific RNP levels.
Aircraft navigation systems eligible for RNP airspace
will be indicated on charts, or announced through
other FAA media such as NOTAMs and chart
bulletins.
22.5 Understanding RNP Operations. Pilots
should have a clear understanding of the aircraft
requirements for operation in a given RNP
environment, and advise ATC if an equipment failure
or other malfunction causes the aircraft to lose its
ability to continue operating in the designated RNP
airspace. When a pilot determines a specified RNP
level cannot be achieved, he/she should be prepared
to revise the route, or delay the operation until an
appropriate RNP level can be ensured. Some airborne
systems use terms other than RNP to indicate the
current level of performance. Depending on the
airborne system implementation, this may be
displayed, and referred to, as actual navigation
performance (ANP), estimate of position error
(EPE), or other.
22.6 Other RNP Applications Outside the
U.S. The FAA, in cooperation with ICAO member
states has led initiatives in implementing the RNP
concept to oceanic operations. For example, RNP-10
routes have been established in the northern Pacific
(NOPAC) which has increased capacity and
efficiency by reducing the distance between tracks to
50 NM. Additionally, the FAA has assisted those U.S.
air carriers operating in Europe where the routes have
been designated as RNP-5. TBL ENR 4.1-7 below,
shows examples of current and future RNP levels of
airspace.
31 JULY 08
AIP ENR 4.1-41
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
TBL ENR 4.1-7
RNP Levels Supported for International Operations
RNP Level Typical Application
4 Projected for oceanic/remote areas
where 30 NM horizontal separation is
applied
5 European Basic RNAV (B-RNAV)
10 Oceanic/remote areas where 50 NM
horizontal separation is applied
22.7 RNAV and RNP Operations
22.7.1 Pilot
22.7.1.1 If unable to comply with the requirements
of an RNAV or RNP procedure, pilots must advise air
traffic control as soon as possible. For example,
“N1234, failure of GPS system, unable RNAV,
request amended clearance.”
22.7.1.2 Pilots are not authorized to fly a published
RNAV or RNP procedure (instrument approach,
departure, or arrival procedure) unless it is retrievable
by the procedure name from the aircraft navigation
database and conforms to the charted procedure.
22.7.1.3 Whenever possible, RNAV routes (Q-or
T-route) should be extracted from the database in
their entirety, rather than loading RNAV route
waypoints from the database into the flight plan
individually. However, selecting and inserting
individual, named fixes from the database is
permitted, provided all fixes along the published
route to be flown are inserted.
22.7.1.4 Pilots must not change any database
waypoint type from a fly-by to fly-over, or vice
versa. No other modification of database waypoints
or the creation of user-defined waypoints on
published RNAV or RNP procedures is permitted,
except to:
a) Change altitude and/or airspeed waypoint
constraints to comply with an ATC clearance/
instruction.
b) Insert a waypoint along the published route to
assist in complying with ATC instruction, example,
“Descend via the WILMS arrival except cross
30 north of BRUCE at/or below FL 210.” This is
limited only to systems that allow along-track
waypoint construction.
22.7.1.5 Pilots of FMS-equipped aircraft, who are
assigned an RNAV DP or STAR procedure and
subsequently receive a change of runway, transition
or procedure, shall verify that the appropriate
changes are loaded and available for navigation.
22.7.1.6 For RNAV 1 DPs and STARs, pilots must
use a CDI, flight director and/or autopilot, in lateral
navigation mode. Other methods providing an
equivalent level of performance may also be
acceptable.
22.7.1.7 For RNAV 1 DPs and STARs, pilots of
aircraft without GPS, using DME/DME/IRU, must
ensure the aircraft navigation system position is
confirmed, within 1,000 feet, at the start point of
take-off roll. The use of an automatic or manual
runway update is an acceptable means of compliance
with this requirement. Other methods providing an
equivalent level of performance may also be
acceptable.
22.7.1.8 For procedures or routes requiring the use
of GPS, if the navigation system does not
automatically alert the flight crew of a loss of GPS,
the operator must develop procedures to verify
correct GPS operation.
22.7.1.9 RNAV terminal procedures (DP and STAR)
may be amended by ATC issuing radar vectors and/or
clearances direct to a waypoint. Pilots should avoid
premature manual deletion of waypoints from their
active “legs” page to allow for rejoining procedures.
23. NAVAID Identifier Removal During
Maintenance
23.1 During periods of routine or emergency
maintenance, coded identification (or code and voice,
where applicable) is removed from certain FAA
NAVAIDs. Removal of the identification serves as
warning to pilots that the facility is officially off the
air for tune-up or repair and may be unreliable even
though intermittent or constant signals are received.
NOTE-
During periods of maintenance, VHF ranges may radiate
a T-E-S-T code (- _ ___ -).
NOTE-
DO NOT attempt to fly a procedure that is NOTAMed out
of service even if the identification is present. In certain
cases, the identification may be transmitted for short
periods as part of the testing.
31 JULY 08
AIP ENR 4.1-42
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
24. User Reports on NAVAID Performance
24.1 Users of the National Airspace System can
render valuable assistance in the early correction of
NAVAID malfunctions by reporting their observation
of undesirable performance. Although NAVAIDs are
monitored by electronic detectors adverse effects of
electronic interference, new obstructions or changes
in terrain near the NAVAID can exist without
detection by the ground monitors. Some of the
characteristics of malfunction or deteriorating
performance which should be reported are: erratic
course or bearing indications; intermittent, or full,
flag alarm; garbled, missing or obviously improper
coded identification; poor quality communications
reception; or, in the case of frequency interference, an
audible hum or tone accompanying radio communications or navaid identification.
24.2 Reporters should identify the NAVAID, location of the aircraft, time of the observation, type of
aircraft and describe the condition observed; the type
of receivers in use will also be useful information.
Reports can be made in any of the following ways:
24.2.1 Immediately, by radio communication to the
controlling Air Route Traffic Control Center, Control
Tower, or Flight Service Station. This provides the
quickest result.
24.2.2 By telephone to the nearest FAA facility.
24.2.3 By FAA Form 8000-7, Safety Improvement
Report, a postage-paid card designed for this
purpose. These cards may be obtained at FAA Flight
Service Stations, Flight Standards District Offices,
and General Aviation Fixed Base Operations.
24.3 In aircraft that have more than one receiver,
there are many combinations of possible interference
between units. This can cause either erroneous
navigation indications or, complete or partial
blanking out of the communications. Pilots should be
familiar enough with the radio installation of
particular airplanes they fly to recognize this type of
interference.
25. Radio Communications and Navigation
Facilities
25.1 A complete listing of air traffic radio
communications facilities and frequencies and radio
navigation facilities and frequencies are contained in
the Airport/Facility Directory. Similar information
for the Pacific and Alaskan areas is contained in the
Pacific and Alaskan Supplements.
31 JULY 08
AIP ENR 4.2-1
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
ENR 4.2 Special Navigation Systems
1. Doppler Radar
1.1_Doppler Radar is a semiautomatic self-contained dead reckoning navigation system (radar
sensor plus computer) which is not continuously
dependent on information derived from ground based
or external aids. The system employs radar signals to
detect and measure ground speed and drift angle,
using the aircraft compass system as its directional
reference. Doppler is less accurate than INS,
however, and the use of an external reference is
required for periodic updates if acceptable position
accuracy is to be achieved on long range flights.
AIP ENR 5.1-1
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
ENR 5. NAVIGATION WARNINGS
ENR 5.1 Prohibited, Restricted, and Other Areas
1. Special Use Airspace
1.1_General
1.1.1_Special use airspace consists of that airspace
wherein activities must be confined because of their
nature, or wherein limitations are imposed upon
aircraft operations that are not a part of those
activities, or both. Except for controlled firing areas,
special use airspace areas are depicted on aeronautical charts.
1.1.2_Prohibited and restricted areas are regulatory
special use airspace and are established in 14 CFR
Part__73 through the rulemaking process.
1.1.3_Warning areas, military operations areas
(MOAs), alert areas, and controlled firing areas
(CFAs) are nonregulatory special use airspace. See
Section ENR 5.2 for information on MOAs, alert
areas, and CFAs.
1.1.4_Special use airspace descriptions (except
CFAs) are contained in FAA Order 7400.8, Special
Use Airspace.
1.1.5_ Special use airspace (except CFAs) are charted
on IFR and visual charts and include the hours of
operation, altitudes, and the controlling agency.
1.2_Prohibited Areas
1.2.1_Prohibited areas contain airspace of defined
dimensions identified by an area on the surface of the
earth within which the flight of aircraft is prohibited.
Such areas are established for security or other
reasons associated with the national welfare. These
areas are published in the Federal Register and are
depicted on aeronautical charts.
1.3_Restricted Areas
1.3.1_Restricted areas contain airspace identified by
an area on the surface of the earth within which the
flight of aircraft, while not wholly prohibited, is
subject to restrictions. Activities within these areas
must be confined because of their nature or
limitations imposed upon aircraft operations that are
not a part of those activities or both. Restricted areas
denote the existence of unusual, often invisible,
hazards to aircraft such as artillery firing, aerial
gunnery, or guided missiles. Penetration of restricted
areas without authorization from the using or
controlling agency may be extremely hazardous to
the aircraft and its occupants. Restricted areas are
published in the Federal Register and constitute
14_CFR Part 73.
1.3.2_ATC facilities apply the following procedures
when aircraft are operating on an IFR clearance
(including those cleared by ATC to maintain
VFR-on-top) via a route which lies within joint-use
restricted airspace.
1.3.2.1_If the restricted area is not active and has been
released to the controlling agency (FAA), the ATC
facility will allow the aircraft to operate in the
restricted airspace without issuing specific clearance
for it to do so.
1.3.2.2_If the restricted area is active and has not been
released to the controlling agency (FAA), the ATC
facility will issue a clearance which will ensure the
aircraft avoids the restricted airspace unless it is on an
approved altitude reservation mission or has obtained
its own permission to operate in the airspace and so
informs the controlling facility.
NOTE-
The above apply only to joint-use restricted airspace and
not to prohibited and nonjoint-use airspace. For the latter
categories, the ATC facility will issue a clearance so the
aircraft will avoid the restricted airspace unless it is on an
approved altitude reservation mission or has obtained its
own permission to operate in the airspace and so informs
the controlling facility.
1.3.3_Restricted airspace is depicted on the en route
chart appropriate for use at the altitude or flight level
being flown. For joint-use restricted areas, the name
of the controlling agency is shown on these charts.
For all prohibited areas and nonjoint-use restricted
areas, unless otherwise requested by the using
agency, the phrase _NO A/G" is shown.
AIP ENR 5.1-2
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
1.4_Warning Areas
1.4.1_A warning area is airspace of defined
dimensions, extending from three nautical miles
outward from the coast of the U.S., that contains
activity that may be hazardous to nonparticipating
aircraft. The purpose of such warning areas is to warn
nonparticipating pilots of the potential danger. A
warning area may be located over domestic or
international waters or both.
2. Other Airspace Areas
2.1_National Security Area (NSA)
2.1.1_National Security Areas consist of airspace of
defined vertical and lateral dimensions established at
locations where there is a requirement for increased
security and safety of ground facilities. Pilots are
requested to voluntarily avoid flying through the
depicted NSA. When it is necessary to provide a
greater level of security and safety, flight in NSAs
may be temporarily prohibited by regulation under
the provisions of 14_CFR Section 99.7. Regulatory
prohibitions will be issued by System Operations,
System Operations Airspace and AIM Office,
Airspace and Rules, and disseminated via NOTAM.
Inquiries about NSAs should be directed to Airspace
and Rules.
2.2_Temporary Flight Restrictions
2.2.1_General._This paragraph describes the types
of conditions under which the FAA may impose
temporary flight restrictions. It also explains which
FAA elements have been delegated authority to issue
a temporary flight restrictions NOTAM and lists the
types of responsible agencies/offices from which the
FAA will accept requests to establish temporary
flight restrictions. The 14 CFR is explicit as to what
operations are prohibited, restricted, or allowed in a
temporary flight restrictions area. Pilots are responsible to comply with 14 CFR Sections 91.137, 91.138,
91.141, and 91.143 when conducting flight in an area
where a temporary flight restrictions area is in effect,
and should check appropriate NOTAMs during flight
planning.
2.2.2_The purpose for establishing a temporary
flight restrictions area is to:
2.2.2.1_Protect persons and property in the air or on
the surface from an existing or imminent hazard
associated with an incident on the surface when the
presence of low-flying aircraft would magnify, alter,
spread, or compound that hazard (14 CFR
Section_91.137(a)(1)).
2.2.2.2_Provide a safe environment for the operation
of disaster relief aircraft (14 CFR Section_91.137(a)(2)).
2.2.2.3_Prevent an unsafe congestion of sightseeing
aircraft above an incident or event which may
generate a high degree of public interest (14 CFR
Section_91.137(a)(3)).
2.2.2.4_Protect declared national disasters for
humanitarian reasons in the State of Hawaii (14_CFR
Section_91.138).
2.2.2.5_Protect the President, Vice President, or other
public figures (14 CFR Section 91.141).
2.2.2.6_Provide a safe environment for space agency
operations (14 CFR Section 91.143).
2.2.3_Except for hijacking situations, when the
provisions of 14 CFR Section 91.137(a)(1) or (a)(2)
are necessary, a temporary flight restrictions area will
only be established by or through the area manager at
the Air Route Traffic Control Center (ARTCC)
having jurisdiction over the area concerned. A
temporary flight restrictions NOTAM involving the
conditions of 14_CFR Section 91.137(a)(3) will be
issued at the direction of the service area office
director having oversight of the airspace concerned.
When hijacking situations are involved, a temporary
flight restrictions area will be implemented through
the TSA Aviation Command Center. The appropriate
FAA air traffic element, upon receipt of such a
request, will establish a temporary flight restrictions
area under 14_CFR Section_91.137(a)(1).
2.2.4_The FAA accepts recommendations for the
establishment of a temporary flight restrictions area
under 14 CFR Section 91.137(a)(1) from military
major command headquarters, regional directors of
the Office of Emergency Planning, Civil Defense
State Directors, State Governors, or other similar
authority. For the situations involving 14 CFR
Section 91.137(a)(2), the FAA accepts recommendations from military commanders serving as regional,
subregional, or Search and Rescue (SAR) coordinators; by military commanders directing or coordinating air operations associated with disaster relief; or by
civil authorities directing or coordinating organized
relief air operations (includes representatives of the
Office of Emergency Planning, U.S. Forest Service,
and State aeronautical agencies). Appropriate
AIP ENR 5.1-3
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
authorities for a temporary flight restrictions
establishment under 14 CFR Section_91.137(a)(3)
are any of those listed above or by State, county, or
city government entities.
2.2.5_The type of restrictions issued will be kept to a
minimum by the FAA consistent with achievement of
the necessary objective. Situations which warrant the
extreme restrictions of 14 CFR Section_91.137(a)(1)
include, but are not limited to: toxic gas leaks or
spills, flammable agents, or fumes which if fanned by
rotor or propeller wash could endanger persons or
property on the surface, or if entered by an aircraft
could endanger persons or property in the air;
imminent volcano eruptions which could endanger
airborne aircraft and occupants; nuclear accident or
incident; and hijackings. Situations which warrant
the restrictions associated with 14 CFR Section_91.137(a)(2) include: forest fires which are
being fought by releasing fire retardants from aircraft; and aircraft relief activities following a disaster
(earthquake, tidal wave, flood, etc.). 14 CFR Section_91.137 (a)(3) restrictions are established for
events and incidents that would attract an unsafe
congestion of sightseeing aircraft.
2.2.6_The amount of airspace needed to protect
persons and property or provide a safe environment
for rescue/relief aircraft operations is normally
limited to within 2,000 feet above the surface and
within a 3-nautical-mile radius. Incidents occurring
within Class B, Class_C, or Class D airspace will
normally be handled through existing procedures and
should not require the issuance of a temporary flight
restrictions NOTAM. Temporary flight restrictions
affecting airspace outside of the U.S. and its
territories and possessions are issued with verbiage
excluding that airspace outside of the 12-mile coastal
limits.
2.2.7_The FSS nearest the incident site is normally
the _coordination facility." When FAA communications assistance is required, the designated FSS will
function as the primary communications facility for
coordination between emergency control authorities
and affected aircraft. The ARTCC may act as liaison
for the emergency control authorities if adequate
communications cannot be established between the
designated FSS and the relief organization. For
example, the coordination facility may relay
authorizations from the on-scene emergency response official in cases where news media aircraft
operations are approved at the altitudes used by relief
aircraft.
2.2.8_ATC may authorize operations in a temporary
flight restrictions area under its own authority only
when flight restrictions are established under 14_CFR
Section 91.137(a)(2) and (a)(3). The appropriate
ARTCC/airport traffic control tower manager will,
however, ensure that such authorized flights do not
hamper activities or interfere with the event for which
restrictions were implemented. However, ATC will
not authorize local IFR flights into the temporary
flight restrictions area.
2.2.9_To preclude misunderstanding, the implementing NOTAM will contain specific and formatted
information. The facility establishing a temporary
flight restrictions area will format a NOTAM
beginning with the phrase _FLIGHT RESTRIC-
TIONS" followed by: the location of the temporary
flight restrictions area; the effective period; the area
defined in statute miles; the altitudes affected; the
FAA coordination facility and commercial telephone
number; the reason for the temporary flight
restrictions; the agency directing any relief activities
and its commercial telephone number; and other
information considered appropriate by the issuing
authority.
EXAMPLE-
1._14 CFR Section 91.137(a)(1):
The following NOTAM prohibits all aircraft operations
except those specified in the NOTAM.
FLIGHT RESTRICTIONS MATTHEWS, VIRGINIA,
EFFECTIVE IMMEDIATELY UNTIL 9610211200.
PURSUANT TO 14 CFR SECTION 91.137(A)(1)
TEMPORARY FLIGHT RESTRICTIONS ARE IN
EFFECT. RESCUE OPERATIONS IN PROGRESS. ONLY
RELIEF AIRCRAFT OPERATIONS UNDER THE
DIRECTION OF THE DEPARTMENT OF DEFENSE
ARE AUTHORIZED IN THE AIRSPACE AT AND BELOW
5,000 FEET MSL WITHIN A 2-NAUTICAL-MILE
RADIUS OF LASER AFB, MATTHEWS, VIRGINIA.
COMMANDER, LASER AFB, IN CHARGE (897)
946-5543 (122.4). STEENSON FSS (792) 555-6141
(123.1) IS THE FAA COORDINATION FACILITY .
2._14 CFR Section 91.137(a)(2):
The following NOTAM permits flight operations in
accordance with 14 CFR Section 91.137(a)(2). The
on-site_emergency response official to authorize media
AIP ENR 5.1-4
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
aircraft operations below the altitudes used by the relief
aircraft.
FLIGHT RESTRICTIONS 25 MILES EAST OF
BRANSOME, IDAHO, EFFECTIVE IMMEDIATELY
UNTIL 9601202359 UTC. PURSUANT TO 14_CFR
SECTION_91.137(A)(2) TEMPORARY FLIGHT
RESTRICTIONS ARE IN EFFECT WITHIN A
4-NAUTICAL-MILE RADIUS OF THE INTERSECTION
OF COUNTY ROADS 564 AND 315 AT AND BELOW
3,500 FEET MSL TO PROVIDE A SAFE ENVIRONMENT
FOR FIRE FIGHTING AIRCRAFT OPERATIONS.
DAVIS COUNTY SHERIFF’S DEPARTMENT (792)
555-8122 (122.9) IS IN CHARGE OF ON-SCENE
EMERGENCY RESPONSE ACTIVITIES. GLIVINGS FSS
(792) 555-1618 (122.2) IS THE FAA COORDINATION
FACILITY.
3._14 CFR Section 91.137(a)(3):
The following NOTAM prohibits sightseeing aircraft
operations.
FLIGHT RESTRICTIONS BROWN, TENNESSEE, DUE
TO OLYMPIC ACTIVITY. EFFECTIVE 9606181100 UTC
UNTIL 9607190200 UTC. PURSUANT TO 14 CFR
SECTION 91.137(A)(3) TEMPORARY FLIGHT
RESTRICTIONS ARE IN EFFECT WITHIN A
3-NAUTICAL-MILE RADIUS OF N355783/W835242
AND VOLUNTEER VORTAC 019 DEGREE RADIAL 3.7
DME FIX AT AND BELOW 2,500 FEET MSL. NORTON
FSS (423) 555-6742 (126.6) IS THE FAA
COORDINATION FACILITY.
4._14 CFR Section 91.138:
The following NOTAM prohibits all aircraft except those
operating under the authorization of the official in charge
of associated emergency or disaster relief response
activities, aircraft carrying law enforcement officials,
aircraft carrying personnel involved in an emergency or
legitimate scientific purposes, carrying properly
accredited news media, and aircraft operating in
accordance with an ATC clearance or instruction.
FLIGHT RESTRICTIONS KAPALUA, HAWAII,
EFFECTIVE 9605101200 UTC UNTIL 9605151500 UTC.
PURSUANT TO 14 CFR SECTION 91.138 TEMPORARY
FLIGHT RESTRICTIONS ARE IN EFFECT WITHIN A
3-NAUTICAL-MILE RADIUS OF N205778/W1564038
AND MAUI /OGG/ VORTAC 275 DEGREE RADIAL AT
14.1 NAUTICAL MILES. JOHN DOE 808-757-4469 OR
122.4 IS IN CHARGE OF THE OPERATION.
HONOLULU /HNL/ 808- 757-4470 (123.6) AFSS IS THE
FAA COORDINATION FACILITY.
5._14 CFR Section 91.141:
The following NOTAM prohibits all aircraft.
FLIGHT RESTRICTIONS STILLWATER, OKLAHOMA,
JUNE 21, 1996. PURSUANT TO 14 CFR SECTION
91.141 AIRCRAFT FLIGHT OPERATIONS ARE
PROHIBITED WITHIN A 3-NAUTICAL-MILE RADIUS,
BELOW 2000 FEET AGL OF N360962/ W970515 AND
THE STILLWATER /SWO/ VOR/DME 176 DEGREE
RADIAL 3.8-NAUTICAL-MILE FIX FROM 1400 LOCAL
TIME TO 1700 LOCAL TIME JUNE 21, 1996 UNLESS
OTHERWISE AUTHORIZED BY ATC.
6._14 CFR Section 91.143:
The following NOTAM prohibits any aircraft of U.S.
registry, or pilot of any aircraft under the authority of an
airman certificate issued by the FAA.
KENNEDY SPACE CENTER SPACE OPERATIONS
AREA EFFECTIVE IMMEDIATELY UNTIL 9610152100
UTC. PURSUANT TO SECTION_91.143, FLIGHT
OPERATIONS CONDUCTED BY FAA CERTIFICATED
PILOTS OR CONDUCTED IN AIRCRAFT OF U.S.
REGISTRY ARE PROHIBITED AT ANY ALTITUDE
FROM SURFACE TO UNLIMITED, WITHIN THE
FOLLOWING AREA 30-NAUTICAL-MILE RADIUS OF
THE MELBOURNE /MLB/ VORTAC 010 DEGREE
RADIAL 21-NAUTICAL-MILE FIX. ST. PETERSBURG,
FLORIDA, /PIE/ AFSS 813-545-1645 (122.2) IS THE
FAA COORDINATION FACILITY AND SHOULD BE
CONTACTED FOR THE CURRENT STATUS OF ANY
AIRSPACE ASSOCIATED WITH THE SPACE SHUTTLE
OPERATIONS. THIS AIRSPACE ENCOMPASSES R2933,
R2932, R2931, R2934, R2935, W497A AND W158A.
ADDITIONAL WARNING AND RESTRICTED AREAS
WILL BE ACTIVE IN CONJUNCTION WITH THE
OPERATIONS. PILOTS SHALL CONSULT ALL
NOTAMS REGARDING THIS OPERATION.
2.3_Parachute Jump Aircraft Operations
2.3.1_Procedures relating to parachute jump areas
are contained in 14 CFR Part 105. Tabulations of
parachute jump areas in the U.S. are contained in the
Airport/Facility Directory.
2.3.2_Pilots of aircraft engaged in parachute jump
operations are reminded that all reported altitudes
must be with reference to mean sea level, or flight
level, as appropriate, to enable ATC to provide
meaningful traffic information.
AIP ENR 5.1-5
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
2.3.3_Parachute Operations in the Vicinity of an
Airport Without an Operating Control Tower.
There is no substitute for alertness while in the
vicinity of an airport. It is essential that pilots
conducting parachute operations be alert, look for
other traffic, and exchange traffic information as
recommended in GEN 3.3, paragraph 9.2, Traffic
Advisory Practices at Airports Without Operating
Control Towers. In addition, pilots should avoid
releasing parachutes while in an airport traffic pattern
when there are other aircraft in that pattern. Pilots
should make appropriate broadcasts on the designated Common Traffic Advisory Frequency (CTAF),
and monitor that CTAF until all parachute activity has
terminated or the aircraft has left the area. Prior to
commencing a jump operation, the pilot should
broadcast the aircraft’s altitude and position in
relation to the airport, the approximate relative time
when the jump will commence and terminate, and
listen to the position reports of other aircraft in the
area.
AIP ENR 5.2-1
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
ENR 5.2 Military Exercise
and Training Areas
1. Military Operations Area (MOA)
1.1_MOAs consist of airspace of defined vertical and
lateral limits established for the purpose of separating
certain military training activities from IFR traffic.
Whenever a MOA is being used, nonparticipating
IFR traffic may be cleared through a MOA if IFR
separation can be provided by ATC. Otherwise, ATC
will reroute or restrict nonparticipating IFR traffic.
1.2_Examples of activities conducted in MOAs
include, but are not limited to: air combat tactics, air
intercepts, aerobatics, formation training, and
low-altitude tactics. Military pilots flying in an active
MOA are exempted from the provisions of 14_CFR
Section 91.303(c) and (d) which prohibits aerobatic
flight within Class D and Class E surface areas, and
within Federal airways. Additionally, the Department
of Defense has been issued an authorization to
operate aircraft at indicated airspeeds in excess of
250_knots below 10,000 feet MSL within active
MOAs.
1.3_Pilots operating under VFR should exercise
extreme caution while flying within a MOA when
military activity is being conducted. The activity
status (active/inactive) of MOAs may change
frequently. Therefore, pilots should contact any FSS
within 100 miles of the area to obtain accurate
real-time information concerning the MOA hours of
operation. Prior to entering an active MOA, pilots
should contact the controlling agency for traffic
advisories.
1.4_MOAs are depicted on Sectional, VFR Terminal
Area, and En Route Low Altitude Charts.
2. Alert Areas
2.1_Alert Areas are depicted on aeronautical charts to
inform nonparticipating pilots of areas that may
contain a high volume of pilot training or an unusual
type of aerial activity. Pilots should be particularly
alert when flying in these areas. All activity within an
Alert Area shall be conducted in accordance with
FAA regulations, without waiver, and pilots of
participating aircraft as well as pilots transiting the
area shall be equally responsible for collision
avoidance.
3. Controlled Firing Area (CFA)
3.1_CFAs contain activities which, if not conducted
in a controlled environment, could be hazardous to
nonparticipating aircraft. The distinguishing feature
of the CFA, as compared to other special use airspace,
is that its activities are suspended immediately when
spotter aircraft, radar, or ground lookout positions
indicate an aircraft might be approaching the area.
There is no need to chart CFAs since they do not cause
a nonparticipating aircraft to change its flight path.
4. Military Training Route (MTR)
4.1_National security depends largely on the
deterrent effect of our airborne military forces. To be
proficient, the military services must train in a wide
range of airborne tactics. One phase of this training
involves _low level" combat tactics. The required
maneuvers and high speeds are such that they may
occasionally make the see-and-avoid aspect of VFR
flight more difficult without increased vigilance in
areas containing such operations. In an effort to
ensure the greatest practical level of safety for all
flight operations, the MTR program was conceived.
4.2_The MTR program is a joint venture by the FAA
and the DOD. MTRs are mutually developed for use
by the military for the purpose of conducting
low-altitude, high-speed training. The routes above
1,500 feet above ground level (AGL) are developed
to be flown, to the maximum extent possible, under
IFR. The routes at 1,500 feet AGL and below are
generally developed to be flown under VFR.
4.3_Generally, MTRs are established below
10,000_feet MSL for operations at speeds in excess of
250 knots. However, route segments may be defined
at higher altitudes for purposes of route continuity.
For example, route segments may be defined for
descent, climbout, and mountainous terrain. There
are IFR and VFR routes as follows:
4.3.1_IFR Military Training Routes-IR._Operations on these routes are conducted in accordance
with IFR regardless of weather conditions.
AIP ENR 5.2-2
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
4.3.2_VFR Military Training Routes-VR._Operations on these routes are conducted in accordance
with VFR except flight visibility shall be 5 miles or
more; and flights shall not be conducted below a
ceiling of less than 3,000 feet AGL.
4.4_MTRs will be identified and charted as follows:
4.4.1_Route Identification
4.4.1.1_MTRs with no segment above 1,500 feet
AGL shall be identified by four number characters;
e.g., IR1206, VR1207.
4.4.1.2_MTRs that include one or more segments
above 1,500 feet AGL shall be identified by three
number characters; e.g., IR206, VR207.
4.4.1.3_Alternate IR/VR routes or route segments are
identified by using the basic/principal route designation followed by a letter suffix, e.g., IR008A,
VR1007B, etc.
4.4.2_Route Charting
4.4.2.1_IFR Low Altitude En Route Chart._This
chart will depict all IR routes and all VR routes that
accommodate operations above 1,500 feet AGL.
4.4.2.2_VFR Sectional Charts._These charts will
depict military training activities such as IR, VR,
MOA, restricted area, warning area, and alert area
information.
4.4.2.3_Area Planning (AP/1B) Chart (DOD
Flight Information Publication-FLIP)._This chart
is published by the DOD primarily for military users
and contains detailed information on both IR and VR
routes.
4.5_The FLIP contains charts and narrative
descriptions of these routes. This publication is
available to the general public by single copy or
annual subscription from:
National Aeronautical Charting Office (NACO)
Distribution Division
Federal Aviation Administration
6501 Lafayette Avenue
Riverdale, MD 20737-1199
Toll free phone:_1-800-638-8972
Commercial:_301-436-8301
4.5.4_This DOD FLIP is available for pilot briefings
at FSSs and many airports.
4.6_Nonparticipating aircraft are not prohibited from
flying within an MTR; however, extreme vigilance
should be exercised when conducting flight through
or near these routes. Pilots should contact FSSs
within 100 NM of a particular MTR to obtain current
information or route usage in their vicinity.
Information available includes times of scheduled
activity, altitudes in use on each route segment, and
actual route width. Route width varies for each MTR
and can extend several miles on either side of the
charted MTR centerline. Route width information for
IR and VR MTRs is also available in the FLIP AP/1B
along with additional MTR (SR/AR) information.
When requesting MTR information, pilots should
give the FSS their position, route of flight, and
destination in order to reduce frequency congestion
and permit the FSS specialist to identify the MTR
which could be a factor.
AIP ENR 5.3-1
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
ENR 5.3 [RESERVED]
AIP ENR 5.4-1
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
ENR 5.4 [RESERVED]
AIP ENR 5.5-1
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
ENR 5.5 [RESERVED]
AIP ENR 5.6-1
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
ENR 5.6 Bird Migration and Areas
With Sensitive Fauna
1. Migratory Bird Activity
1.1_Bird strike risk increases because of bird
migration during the months of March through April
and August through November.
1.2_The altitudes of migrating birds vary with winds
aloft, weather fronts, terrain elevations, cloud
conditions, and other environmental variables. While
over 90 percent of the reported bird strikes occur at or
below 3,000 feet AGL, strikes at higher altitudes are
common during migration. Ducks and geese are
frequently observed up to 7,000 feet AGL and pilots
are cautioned to minimize en route flying at lower
altitudes during migration.
1.3_Considered the greatest potential hazard to
aircraft because of their size, abundance, or habit of
flying in dense flocks are gulls, waterfowl, vultures,
hawks, owls, egrets, blackbirds, and starlings. Four
major migratory flyways exist in the U.S. The
Atlantic Flyway parallels the Atlantic coast, the
Mississippi Flyway stretches from Canada through
the Great Lakes and follows the Mississippi River.
The Central Flyway represents a broad area east of the
Rockies, stretching from Canada through Central
America. The Pacific Flyway follows the west coast
and overflies major parts of Washington, Oregon, and
California. There are also numerous smaller flyways
which cross these major north-south migratory
routes.
2. Reducing Bird Strike Risks
2.1_The most serious strikes are those involving
ingestion into an engine (turboprop and turbine jet
engines) or windshield strikes. These strikes can
result in emergency situations requiring prompt
action by the pilot.
2.2_Engine ingestions may result in sudden loss of
power or engine failure. Review engine out
procedures, especially when operating from airports
with known bird hazards or when operating near high
bird concentrations.
2.3_Windshield strikes have resulted in pilots
experiencing confusion, disorientation, loss of
communications, and aircraft control problems.
Pilots are encouraged to review their emergency
procedures before flying in these areas.
2.4_When encountering birds en route, climb to
avoid collision because birds in flocks generally
distribute themselves downward, with lead birds
being at the highest altitude.
2.5_Avoid overflight of known areas of bird
concentration and flying low altitudes during bird
migration. Charted wildlife refuges and other natural
areas contain unusually high local concentration of
birds which may create a hazard to aircraft.
3. Reporting Bird Strikes
3.1_Pilots are urged to report any bird or other
wildlife strike using FAA Form 5200-7, Bird/Other
Wildlife Strike Report (FIG ENR 5.6-1). Forms are
available at any FSS or any FAA Regional Office.
Wildlife strikes can also be reported electronically at:
http://wildlife-mitigation.tc.faa.gov. The data derived from these reports are used to develop standards
to cope with this potential hazard to aircraft and for
documentation of necessary habitat control on
airports.
4. Reporting Bird and Other Wildlife
Activities
4.1_If you observe birds or other animals on or near
the runway, request airport management to disperse
the wildlife before taking off. Also contact the nearest
FAA ARTCC, FSS, or tower (including non-Federal
towers) regarding large flocks of birds and report the:
4.1.1_Geographic location.
4.1.2_Bird type (geese, ducks, gulls, etc.).
4.1.3_Approximate numbers.
4.1.4_Altitude.
4.1.5_Direction of bird flight path.
AIP ENR 5.6-2
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
5. Pilot Advisories on Bird and Other Wildlife
Hazards
5.1_Many airports advise pilots of other wildlife
hazards caused by large animals on the runway
through the Airport/Facility Directory and the
NOTAM system. Collisions between landing and
departing aircraft with animals on the runway are
increasing and are not limited to rural airports. These
accidents have also occurred at several major
airports. Pilots should exercise extreme caution when
warned of the presence of wildlife on and in the
vicinity of airports. If in close proximity to movement
areas you observe deer or other large animals, advise
the FSS, tower, or airport management.
6. Flights Over Charted U.S. Wildlife
Refuges, Parks, and Forest Service Areas
6.1_The landing of aircraft is prohibited on lands or
waters administered by the National Park Service,
U.S. Fish and Wildlife Service, or U.S. Forest Service
without authorization from the respective agency.
Exceptions include (1) when forced to land due to an
emergency beyond the control of the operator, (2) at
officially designated landing sites, or (3) an approved
official business of the Federal Government.
6.2_All pilots are requested to maintain a minimum
altitude of 2,000 feet above the terrain of the
following: National Parks, Monuments, Seashores,
Lakeshores, Recreation Areas and Scenic Riverways
administered by the National Park Service, National
Wildlife Refuges, Big Game Refuges, Game Ranges,
and Wildlife Ranges administered by the U.S. Fish
and Wildlife Service, and Wilderness and Primitive
Areas administered by the U.S. Forest Service.
NOTE-
FAA Advisory Circular 91-36, Visual Flight Rules (VFR)
Flight Near Noise-sensitive Areas, defines the surface of a
national park area (including parks, forests, primitive
areas, wilderness areas, recreational areas, national
seashores, national monuments, national lakeshores, and
national wildlife refuge and range areas) as: _The highest
terrain within 2,000 feet laterally of the route of flight, or
the upper-most rim of a canyon or valley."
6.3_Federal statutes prohibit certain types of flight
activity and/or provide altitude restrictions over
designated U.S. Wildlife Refuges, Parks, and Forest
Service Areas. These designated areas are charted on
Sectional Charts, for example: Boundary Waters
Canoe Wilderness Areas, Minnesota; Haleakala
National Park, Hawaii; Yosemite National Park,
California; and Grand Canyon National Park,
Arizona,
6.4_Federal regulations also prohibit airdrops by
parachute or other means of persons, cargo, or objects
from aircraft on lands administered by the three
agencies without authorization from the respective
agency. Exceptions include: (1) emergencies involving the safety of human life or (2) threat of serious
property loss.
AIP ENR 5.6-3
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
FIG ENR 5.6-1
Bird/Other Wildlife Strike Report
AIP ENR 5.7-1
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
ENR 5.7 Potential Flight Hazards
1. Accident Causal Factors
1.1 The ten most frequent cause factors for General
Aviation Accidents in 1992 that involve the pilot in
command are:
1.1.1 Inadequate preflight preparation and/or
planning.
1.1.2 Failure to obtain/maintain flying speed.
1.1.3 Failure to obtain/maintain flying speed.
1.1.4 Failure to maintain direction control.
1.1.5 Improper level off.
1.1.6 Failure to see and avoid objects or obstructions.
1.1.7 Mismanagement of fuel.
1.1.8 Improper in-flight decisions or planning.
1.1.9 Misjudgment of distance and speed.
1.1.10 Selection of unsuitable terrain.
1.1.11 Improper operation of flight controls.
1.2 The above factors have continued to plague
General Aviation pilots over the years. This list
remains relatively stable and points out the need for
continued refresher training to establish a higher level
of flight proficiency for all pilots. A part of the FAA’s
continuing effort to promote increased aviation safety
is the Aviation Safety Program. For information on
the FAA’s Aviation Safety Program, readers can
contact their nearest Flight Standards District
Office’s Safety Program Manager.
1.3 Be alert at all times, especially when the weather
is good. Most pilots pay attention to business when
they are operating in full IFR weather conditions, but
strangely, air collisions almost invariably have
occurred under ideal weather conditions. Unlimited
visibility appears to encourage a sense of security
which is not at all justified. Considerable information
of value may be obtained by listening to advisories
being issued in the terminal area, even though
controller workload may prevent a pilot from
obtaining individual service.
1.4 If you think another aircraft is too close to you,
give way instead of waiting for the other pilot to
respect the right-of-way to which you may be
entitled. It is a lot safer to pursue the right-of-way
angle after you have completed your flight.
2. VFR In Congested Area
2.1 A high percentage of near midair collisions occur
below 8,000 feet AGL and within 30 miles of an
airport. When operating VFR in highly congested
areas, whether you intend to land at an airport within
the area or are just flying through, it is recommended
that extra vigilance be maintained and that you
monitor an appropriate control frequency. Normally
the appropriate frequency is an approach control
frequency. By such monitoring action you can “get
the picture” of the traffic in your area. When the
approach controller has radar, traffic advisories may
be given to VFR pilots who request them, subject to
the provisions included in ENR 1.1, paragraph 37.10.4, Radar Traffic Information Service
(RTIS).
3. Obstructions to Flight
3.1 General
3.1.1 Many structures exist that could significantly
affect the safety of your flight when operating below
500 feet above ground level (AGL), and particularly
below 200 feet AGL. While 14 CFR Section 91.119
allows flight below 500 AGL when over sparsely
populated areas or open water, such operations are
very dangerous. At and below 200 feet AGL there are
numerous power lines, antenna towers, etc., that are
not marked and lighted as obstructions and therefore
may not be seen in time to avoid a collision. Notices
to Airmen (NOTAMs) are issued on those lighted
structures experiencing temporary light outages.
However, some time may pass before the FAA is
notified of these outages, and the NOTAM issued,
thus pilot vigilance is imperative.
3.2 Antenna Towers
3.2.1 Extreme caution should be exercised when
flying less that 2,000 feet above ground level (AGL)
because of numerous skeletal structures, such as
radio and television antenna towers, that exceed
1,000 feet AGL with some extending higher than
2,000 feet AGL. Most skeletal structures are
supported by guy wires which are very difficult to see
in good weather and can be invisible at dusk or during
periods of reduced visibility. These wires can extend
AIP ENR 5.7-2
United States of America 15 MAR 07
Federal Aviation Administration
Nineteenth Edition
about 1,500 feet horizontally from a structure;
therefore, all skeletal structures should be avoided
horizontally by at least 2,000 feet. Additionally, new
towers may not be on your current chart because the
information was not received prior to the printing of
the chart.
3.3 Overhead Wires
3.3.1 Overhead transmission and utility lines often
span approaches to runways, natural flyways such as
lakes, rivers, gorges, and canyons, and cross other
landmarks pilots frequently follow such as highways,
railroad tracks, etc. As with antenna towers, these
high voltage/power lines or the supporting structures
of these lines may not always be readily visible and
the wires may be virtually impossible to see under
certain conditions. In some locations, the supporting
structures of overhead transmission lines are
equipped with unique sequence flashing white strobe
light systems to indicate that there are wires between
the structures. However, many power lines do not
require notice to the FAA and, therefore, are not
marked and/or lighted. Many of those that do require
notice do not exceed 200 feet AGL or meet the
Obstruction Standard of 14 CFR Part 77 and,
therefore, are not marked and/or lighted. All pilots are
cautioned to remain extremely vigilant for these
power lines or their supporting structures when
following natural flyways or during the approach and
landing phase. This is particularly important for
seaplane and/or float equipped aircraft when landing
on, or departing from, unfamiliar lakes or rivers.
3.4 Other Objects/Structures
3.4.1 There are other objects or structures that could
adversely affect your flight such as construction
cranes near an airport, newly constructed buildings,
new towers, etc. Many of these structures do not meet
charting requirements or may not yet be charted
because of the charting cycle. Some structures do not
require obstruction marking and/or lighting and some
may not be marked and lighted even though the FAA
recommended it.
4. Avoid Flight Beneath Unmanned
Balloons
4.1 The majority of unmanned free balloons
currently being operated have, extended below them,
either a suspension device to which the payload or
instrument package is attached, or a trailing wire
antenna, or both. In many instances these balloon
subsystems may be invisible to the pilot until his/her
aircraft is close to the balloon, thereby creating a
potentially dangerous situation. Therefore, good
judgment on the part of the pilot dictates that aircraft
should remain well clear of all unmanned free
balloons and flight below then should be avoided at
all times.
4.2 Pilots are urged to report any unmanned free
balloons sighted to the nearest FAA ground facility
with which communication is established. Such
information will assist FAA ATC facilities to identify
and flight follow unmanned free balloons operating
in the airspace.
5. Unmanned Aircraft
5.1 Unmanned Aircraft Systems (UAS), formerly
referred to as “Unmanned Aerial Vehicles” (UAVs)
or “drones,” are having an increasing operational
presence in the NAS. Once the exclusive domain of
the military, UAS are now being operated by various
entities. Although these aircraft are “unmanned,”
UAS are flown by a remotely located pilot and crew.
Physical and performance characteristics of unmanned aircraft (UA) vary greatly and unlike model
aircraft that typically operate lower than 400 feet
AGL, UA may be found operating at virtually any
altitude and any speed. Sizes of UA can be as small
as several pounds to as large as a commercial
transport aircraft. UAS come in various categories
including airplane, rotorcraft, powered-lift (tilt-
rotor), and lighter-than-air. Propulsion systems of
UAS include a broad range of alternatives from
piston powered and turbojet engines to battery and
solar-powered electric motors.
5.2 To ensure segregation of UAS operations from
other aircraft, the military typically conducts UAS
operations within restricted or other special use
airspace. However, UAS operations are now being
approved in the NAS outside of special use airspace
through the use of FAA-issued Certificates of Waiver
or Authorization (COA) or through the issuance of a
special airworthiness certificate. COA and special
airworthiness approvals authorize UAS flight
operations to be contained within specific geographic
boundaries and altitudes, usually require coordination with an ATC facility, and typically require the
issuance of a NOTAM describing the operation to be
conducted. UAS approvals also require observers to
provide “see-and-avoid” capability to the UAS crew
and to provide the necessary compliance with 14 CFR
Section 91.113. For UAS operations approved at or
31 JULY 08
AIP ENR 5.7-3
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
above FL180, UAS operate under the same
requirements as that of manned aircraft (i.e., flights
are operated under instrument flight rules, are in
communication with ATC, and are appropriately
equipped). |
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