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ADS-B systems will not provide ATC with the appropriate
aircraft identification information. This function should
first be disabled before contacting ATC.
46.4.3 Aircraft with an Inoperative/Malfunctioning
ADS-B Transmitter or in the Event of an Inoperative
Ground Broadcast Transceiver (GBT).
46.4.3.1 ATC will inform the flight crew when the
aircraft's ADS-B transmitter appears to be inoperative
or malfunctioning:
PHRASEOLOGYYOUR
ADS-B TRANSMITTER APPEARS TO BE
INOPERATIVE/MALFUNCTIONING. STOP ADS-B
TRANSMISSIONS.
46.4.3.2 ATC will inform the flight crew when the
GBT transceiver becomes inoperative or malfunctioning,
as follows:
PHRASEOLOGY-
(Name of facility) GROUND BASED TRANSCEIVER
INOPERATIVE/MALFUNCTIONING.
(And if appropriate) RADAR CONTACT LOST.
NOTEAn
inoperative or malfunctioning GBT may also cause a
loss of ATC surveillance services.
46.4.3.3 ATC will inform the flight crew if it
becomes necessary to turn off the aircraft's ADS-B
transmitter.
PHRASEOLOGYSTOP
ADS-B TRANSMISSIONS.
46.4.3.4 Other malfunctions and considerations:
Loss of automatic altitude reporting capabilities
(encoder failure) will result in loss of ATC altitude
advisory services.
46.5 ADS-B Limitations
46.5.1 The ADS-B cockpit display of traffic is NOT
intended to be used as a collision avoidance system
and does not relieve the pilot's responsibility to “see
and avoid” other aircraft. (See paragraph 42.10, See
and Avoid). ADS-B provides proximity warning
only to assist the pilot in the visual acquisition of
other aircraft. ADS-B shall not be used for avoidance
maneuvers during IMC or other times when there is
no visual contact with the intruder aircraft. ADS-B is
intended only to assist in visual acquisition of other
aircraft. No avoidance maneuvers are provided nor
authorized, as a direct result of an ADS-B display or
an ADS-B alert.
46.5.2 ADS-B does not alter or diminish the pilot's
basic authority and responsibility to ensure safe
flight. ADS-B only displays aircraft that are ADS-B
equipped; therefore, aircraft that are not ADS-B
equipped or aircraft that are experiencing an ADS-B
failure will not be displayed. ADS-B alone does not
ensure safe separation.
46.5.3 Presently, no air traffic services or handling is
predicated on the availability of an ADS-B cockpit
display. A “traffic-in-sight” reply to ATC must be
based on seeing an aircraft out-the-window, NOT on
the cockpit display.
46.5.4 Use of ADS-B radar services is limited to the
service volume of the GBT.
NOTEThe
coverage volume of GBTs are limited to line-of-sight.
30 AUG 07
AIP ENR 1.1-75
United States of America 15 MAR 07
Federal Aviation Administration Nineteenth Edition
46.6 Reports of ADS-B Malfunctions
Users of ADS-B can provide valuable assistance in
the correction of malfunctions by reporting instances
of undesirable system performance. Reporters should
identify the time of observation, location, type and
identity of aircraft, and describe the condition
observed; the type of avionics system and its software
version in use should also be included. Since ADS-B
performance is monitored by maintenance personnel
rather than ATC, it is suggested that malfunctions be
reported in any one of the following ways:
46.6.1 By radio or telephone to the nearest Flight
Service Station (FSS) facility.
46.6.2 By FAA Form 8000-7, Safety Improvement
Report, a postage-paid card is designed for this
purpose. These cards may be obtained from FAA
FSSs, Flight Standards District Offices, and general
aviation fixed-based operators.
46.6.3 By reporting the failure directly to the FAA
Safe Flight 21 program at 1-877-FLYADSB or
http://www.adsb.gov.
47. Traffic Information Service-Broadcast
(TIS-B)
47.1 Introduction
Traffic Information Service-Broadcast (TIS-B) is
the broadcast of traffic information to ADS-B
equipped aircraft from ADS-B ground stations. The
source of this traffic information is derived from
ground-based air traffic surveillance sensors,
typically radar. TIS-B service is becoming available
in selected locations where there are both adequate
surveillance coverage from ground sensors and
adequate broadcast coverage from Ground Based
Transceivers (GBTs). The quality level of traffic
information provided by TIS-B is dependent upon
the number and type of ground sensors available as
TIS-B sources and the timeliness of the reported data.
47.2 TIS-B Requirements
In order to receive TIS-B service, the following
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