PHRASEOLOGY.
(Name of facility) GROUND BASED TRANSCEIVER
INOPERATIVE/MALFUNCTIONING.
(And if appropriate) RADAR CONTACT LOST.
NOTE.
An 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.
PHRASEOLOGY.
STOP 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.
NOTE.
The coverage volume of GBTs are limited to line.of.sight.
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. Reports 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:
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