TIBA Procedures (AIP Reference)
Have noticed this is getting common each day in Australia now.
Where are all the Air Traffic Controllers? On holidays or something? (Do nav-charges get refunded?)
Have also noticed that many (like me) are just not familiar with TIBA, so thought I would post the link in the interests of survival.
GEN (25 NOV 04)
5. TRAFFIC INFORMATION BROADCAST BY AIRCRAFT
(TIBA)
5.1 TIBA Procedures
5.1.1 TIBA procedures are intended to permit reports and relevant
supplementary information of an advisory nature to be transmitted
by pilots for the information of pilots of other aircraft in the vicinity.
5.2 Frequency
5.2.1 Aircraft must maintain a listening watch on the appropriate TIBA
frequency (128.95MHZ, at or above FL200; 126.35MHZ below
FL200). Where VHF is used for air-ground communications with
ATS and an aircraft has two serviceable VHF sets, one must be
tuned to the appropriate ATS frequency and the other to the TIBA
frequency.
5.3 Listening Watch
5.3.1 A listening watch must be maintained on the TIBA frequency 10
minutes before entering the designated airspace until leaving this
airspace. For an aircraft taking off from an aerodrome located
within 10 minutes flying time of that airspace, listening watch must
start as soon as practicable after take-off.
5.4 Time of Broadcasts
5.4.1 Broadcasts must be made:
a. 10 minutes before entering the designated airspace or, for an
aircraft taking off from an aerodrome located with 10 minutes
flying time of the airspace, as soon as practicable after take-off;
b. 10 minutes prior to crossing a reporting point;
c. 10 minutes prior to crossing or joining an ATS contingency
route;
d. at 20 minute intervals between distant reporting points;
e. 2 to 5 minutes, where possible, before a change in flight level;
f. at the time of a change in flight level; and
g. at any other time considered necessary by the pilot.
5.5 Acknowledgement of Broadcasts
5.5.1 Broadcasts should not be acknowledged unless a potential
collision risk exists.
Index ENR TOC AD TOC GEN TOC
GEN (25 NOV 04)
5.6 Changes of Cruising Level
5.6.1 Cruising level changes should not be made within the designated
airspace, unless considered necessary by pilots to avoid traffic
conflicts, for weather avoidance or for other valid operational
reasons.
5.6.2 When changes to cruising level are unavoidable, all available
aircraft lighting which would improve the visual detection of the
aircraft must be displayed while changing levels.
5.6.3 When a change of level is anticipated or initiated, a change of level
report must be made. When the new level is reached, a report
advising that the aircraft is maintaining the new level must be
made.
5.7 Collision Avoidance
5.7.1 If, on receipt of a traffic information broadcast from another
aircraft, a pilot decides that immediate action is necessary to avoid
an imminent collision risk to the aircraft, and this cannot be
achieved in accordance with the right of way provisions or TCAS
resolution, the pilot should:
a. unless an alternative manoeuvre appears more appropriate,
immediately descend 1000FT if above FL290, or 500FT if at or
below FL290;
b. display all available aircraft lighting which would improve the
visual detection of the aircraft;
c. as soon as possible, reply to the broadcast advising action
being taken;
d. notify the action taken on the appropriate TIBA frequency; and
e. as soon as practicable, resume normal flight level, notifying the
action on the appropriate TIBA frequency.
5.8 Position Reporting
5.8.1 Normal position reporting procedures should be continued at all
times, regardless of any action taken to initiate or acknowledge a
traffic information broadcast.
5.8.2 A position report must be made on the next CTA/FIA frequency 15
minutes prior to leaving airspace in which TIBA procedures apply
to obtain a clearance or re-establish SARWATCH on the
appropriate ATS frequency.