Stephen James wrote:

There is also a Head Office NOTAM which says pretty much the same as AIP:
C133/08 REVIEW C126/08
CONTINGENCY PROCEDURES WHEN AIR TRAFFIC SERVICES ARE TEMPORARILY NOT
AVAILABLE
INTRODUCTION: WHEN AIR TRAFFIC SERVICES ARE TEMPORARILY NOT AVAILABLE
IN A GIVEN AIRSPACE, THE PROCEDURES CONTAINED IN THE FOLLOWING
PARAGRAPHS MAY BE AUTHORISED. OPERATORS/PILOTS ARE RESPONSIBLE FOR
OBTAINING ANY REQUIRED CHANGES TO THEIR AIR OPERATORS CERTIFICATE
(AOC) FOR OPERATIONS IN THE CLASSES AND TYPES OF AIRSPACE ADDRESSED
IN THE FOLLOWING PARAGRAPHS. DETAILS OF SPECIFIC PROCEDURES WILL BE
PROMULGATED BY NOTAM. NOTHING IN THESE PROCEDURES PRECLUDES THE PILOT
FROM EXERCISING RESPONSIBILITY FOR SAFE OPERATIONS, INCLUDING
SEPARATION AND COLLISION AVOIDANCE WITH OTHER AIRCRAFT IN THE AIR AND
ON THE GROUND.

ENROUTE SERVICE NOT AVAILABLE: TIBA PROCEDURES WILL APPLY ON
PUBLISHED TIBA HIGH AND LOW FREQUENCIES, EXCEPT THAT IN PUBLISHED
CLASS G AIRSPACE OTHER THAN OVER THE HIGH SEAS, PUBLISHED AREA VHF
FREQUENCIES SHALL BE USED. FIS AND SAR ALERTING WILL BE PROVIDED AS
REMAINING CAPABILITY PERMITS.

APPROACH CONTROL SERVICE NOT AVAILABLE: IN PUBLISHED CLASS C TERMINAL
AIRSPACE AND CONTROL ZONES, TIBA PROCEDURES WILL APPLY UTILISING A
NOMINATED BROADCAST FREQUENCY. ADDITIONALLY, MANDATORY BROADCAST
PROCEDURES SHALL BE ADOPTED.
TEMPORARY RESTRICTED AIRSPACE MAY BE DECLARED ENCOMPASSING HIGH
DENSITY TERMINAL AIRSPACE.
APPROVALS FOR OPERATING WITHIN THE TEMPORARY RESTRICTED AIRSPACE WILL
BE MANAGED TO PREVENT OVERLOAD OF THE CONTINGENCY SYSTEM.
IN TERMINAL AIRSPACE AND THE CONTROL ZONE ASSOCIATED WITH A CLASS
D TOWER, ATS WILL BE IN ACCORDANCE WITH PROCEDURES IN FORCE WHEN
THE TOWER IS CLOSED UNDER NORMAL CIRCUMSTANCE.
FIS AND SAR ALERTING WILL BE PROVIDED AS REMAINING CAPABILITY
PERMITS.

AERODROME CONTROL SERVICE NOT AVAILABLE: AT CONTINUOUS AERODROMES,
TIBA PROCEDURES WILL APPLY UTILISING A NOMINATED BROADCAST FREQUENCY.
ADDITIONALLY, MANDATORY BROADCAST PROCEDURES SHALL BE ADOPTED.
AT NON CONTINUOUS AERODROMES, ATS WILL BE IN ACCORDANCE WITH
PROCEDURES IN FORCE WHEN THE TOWER IS CLOSED UNDER NORMAL
CIRCUMSTANCES.
FIS AND SAR ALERTING WILL BE PROVIDED AS REMAINING CAPABILITY
PERMITS.

AIRSPACE MANAGEMENT: PROCEDURES CONSISTENT WITH ATTACHMENT D TO ICAO
ANNEX 11 MAY BE PROMULGATED BY NOTAM TO ASSIST WITH MANAGEMENT OF
OPERATIONS IN CONTINGENCY AIRSPACE. PROCEDURES MAY INCLUDE ONE
OR MORE OF, BUT NOT BE LIMITED TO:
A. PROGRAMMED TAKE--OFF AND ARRIVAL TIMES AT LOCATIONS WHERE
THERE IS A LIKELIHOOD OF HIGH TRAFFIC DENSITIES OCCURRING;
B. ADDITIONAL MANDATORY BROADCAST REQUIREMENTS IN TERMINAL
AIRSPACE;
C. NOMINATION OF PREFERRED RUNWAYS;
D. A REQUIREMENT FOR ALL OPERATIONS IN CLASS C TERMINAL AREAS TO BE
UNDER THE IFR;
E. A REQUIREMENT TO OPERATE TCAS AND TRANSPONDER WHERE FITTED;
AND
F. A REQUIREMENT TO DISPLAY NAVIGATION LIGHTS.

MANDATORY BROADCAST PROCEDURES (ATC TEMPORARILY NOT
AVAILABLE): WHEN ATC IS TEMPORARILY NOT AVAILABLE, MANDATORY
BROADCAST PROCEDURES MAY BE SPECIFIED IN ADDITION TO TIBA BROADCASTS
AND WILL BE USED BY PILOTS TO PROVIDE ADVISORY TRAFFIC INFORMATION TO
OTHER AIRCRAFT AND TO ARRANGE MUTUAL SEGREGATION. MANDATORY BROADCAST
FREQUENCIES WILL BE NOTIFIED BY NOTAM.
WHEN ARRIVING OR DEPARTING FROM AN AERODROME WHERE MANDATORY
BROADCAST PROCEDURES APPLY, PILOTS MUST MONITOR THE APPROPRIATE
MANDATORY BROADCAST FREQUENCY. BROADCASTS MUST BE MADE AS
FOLLOWS:
SITUATION PHRASE
1. WHEN A PILOT BROADCASTS INTENTIONS: ALL STATIONS (LOCATION)
(APPROPRIATE INFORMATION)
2. TAXIING AT AN AERODROME:(AIRCRAFT TYPE) TAXIING (LOCATION) RUNWAY
(NUMBER) FOR (DESTINATION, OR DEPARTURE QUADRANT OR INTENTION)
3. ABOUT TO COMMENCE TAKE-OFF: LINING UP/ROLLING (RUNWAY
NUMBER) TURNING (LEFT/RIGHT) TRACKING (QUADRANT) CLIMBING
TO (LEVEL)
4. DEPARTING: DEPARTED (LOCATION) TRACKING (DEGREES MAGNETIC)
CLIMBING TO (LEVEL) FOR (DESTINATION)
5. WHEN INBOUND -- BEFORE CROSSING THE BOUNDARY OF THE AREA IN WHICH
MANDATORY BROADCASTS APPLY (AIRCRAFT TYPE) (POSITION REPORTED AS
EITHER THE RADIAL, BEARING OR QUADRANT FROM THE AERODROME) (LEVEL)
(INTENTIONS)
6. JOINING THE CIRCUIT (AIRCRAFT TYPE) JOINING (POSITION IN CIRCUIT)
RUNWAY (NUMBER)PILOT DISCRETION SHOULD BE USED IN MAKING OTHER THAN
THE PRESCRIBED CALLS TO ASSIST OTHER TRAFFIC; EG, EXECUTING A MISSED
APPROACH, OR POSITION IN THE CIRCUIT AREA, OR LEAVING LEVELS
DESIGNATED ON TMA ROUTES.

TRAFFIC INFORMATION BROADCAST BY AIRCRAFT
(TIBA)
TIBA PROCEDURES: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.
FREQUENCY: AIRCRAFT MUST MAINTAIN A LISTENING WATCH ON THE
APPROPRIATE TIBA FREQUENCY. 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.
THE APPROPRIATE TIBA FREQUENCIES ARE:
A. AT OR ABOVE FL200, 128.95MHZ;
B. BELOW FL200:
(1) IN CLASS G AIRSPACE OTHER THAN IN OCEANIC AREAS, THE FIA
FREQUENCY;
(2) OTHERWISE 126.35MHZ.

LISTENING WATCH: 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.

TIME OF BROADCASTS: 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.

ACKNOWLEDGEMENT OF BROADCASTS: BROADCASTS SHOULD NOT BE ACKNOWLEDGED
UNLESS A POTENTIAL COLLISION RISK EXISTS.

CHANGES OF CRUISING LEVEL: 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.
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.
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.

COLLISION AVOIDANCE: 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 FL410, OR 500FT IF AT OR
BELOW FL410;
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.
POSITION REPORTING: NORMAL POSITION REPORTING PROCEDURES SHOULD BE
CONTINUED AT ALL TIMES, REGARDLESS OF ANY ACTION TAKEN TO INITIATE OR
ACKNOWLEDGE A TRAFFIC INFORMATION BROADCAST.
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.
FROM 07 170224 TO 09 250100 EST