8/15/19 12/31/20  Pilot/Controller Glossary Pilot/Controller Glossary  nonthreatening/nonhostile; TOI was identified based  on specific and credible intelligence that was later  determined to be invalid or unreliable; or displayed  data is identified and characterized as invalid .  avoidance system based on radar beacon signals  which operates independent of ground-based equip- ment. TCAS-I generates traffic advisories only.  TCAS-II generates traffic advisories, and resolution  (collision avoidance) advisories in the vertical plane.  TRAFFIC- TRAFFIC INFORMATION - (See TRAFFIC ADVISORIES.)  a.  A term used by a controller to transfer radar  identification of an aircraft to another controller for  the purpose of coordinating separation action. Traffic  is normally issued:  TRAFFIC INFORMATION SERVICE-BROAD- CAST (TIS-B)- The broadcast of ATC derived  traffic information to ADS-B equipped (1090ES or  UAT) aircraft. The source of this traffic information  is derived from ground-based air traffic surveillance  sensors, typically from radar targets. TIS-B service  will be available throughout the NAS where there are  both adequate surveillance coverage (radar) and  adequate broadcast coverage from ADS-B ground  stations. Loss of TIS-B will occur when an aircraft  enters an area not covered by the GBT network. If this  occurs in an area with adequate surveillance coverage  (radar), nearby aircraft that remain within the  adequate broadcast coverage (ADS-B) area will view  the first aircraft. TIS-B may continue when an  aircraft enters an area with inadequate surveillance  coverage (radar); nearby aircraft that remain within  the adequate broadcast coverage (ADS-B) area will  not view the first aircraft.  1.  In response to a handoff or point out,  2.  In anticipation of a handoff or point out, or  3.  In conjunction with a request for control of an  aircraft.  b.  A term used by ATC to refer to one or more  aircraft.  TRAFFIC ADVISORIES- Advisories issued to alert  pilots to other known or observed air traffic which  may be in such proximity to the position or intended  route of flight of their aircraft to warrant their  attention. Such advisories may be based on:  a.  Visual observation.  c.  Verbal reports from pilots or other facilities.  b.  Observation of radar identified and nonidenti- fied aircraft targets on an ATC radar display, or  Note 1: The word “traffic” followed by additional  information, if known, is used to provide such  advisories; e.g., “Traffic, 2 o'clock, one zero miles,  southbound, eight thousand.”  Note 2: Traffic advisory service will be provided to  the extent possible depending on higher priority  duties of the controller or other limitations; e.g.,  radar limitations, volume of traffic, frequency  congestion, or controller workload. Radar/ nonradar traffic advisories do not relieve the pilot  of his/her responsibility to see and avoid other  aircraft. Pilots are cautioned that there are many  times when the controller is not able to give traffic  advisories concerning all traffic in the aircraft's  proximity; in other words, when a pilot requests or  is receiving traffic advisories, he/she should not  assume that all traffic will be issued.  TRAFFIC ALERT (aircraft call sign), TURN  (left/right) IMMEDIATELY, (climb/descend) AND  MAINTAIN (altitude).  (Refer to AIM.)  (See SAFETY ALERT.)  TRAFFIC ALERT AND COLLISION AVOID- ANCE SYSTEM (TCAS)- An airborne collision  PCG T-6  TRAFFIC NO LONGER OBSERVED- Indicates  that the traffic described in a previously issued traffic  advisory is no longer depicted on radar, but may still  be a factor.  TRAFFIC NO FACTOR- Indicates that the traffic  described in a previously issued traffic advisory is no  factor.  TRAFFIC MANAGEMENT UNIT- The entity in  ARTCCs and designated terminals directly involved  in the active management of facility traffic. Usually  under the direct supervision of an assistant manager  for traffic management.  TRAFFIC MANAGEMENT PROGRAM ALERT- A term used in a Notice to Airmen (NOTAM) issued  in conjunction with a special traffic management  program to alert pilots to the existence of the program  and to refer them to a special traffic management  program advisory message for program details. The  contraction TMPA is used in NOTAM text.  TRAFFIC IN SIGHT- Used by pilots to inform a  controller that previously issued traffic is in sight.  (See NEGATIVE CONTACT.)  (See TRAFFIC ADVISORIES.) 