3.5 Co-ordination between ATS units
Circumstances Phraseologies
3.5.1 Estimates and revisions a) ESTIMATE [direction of flight] (aircraft call sign) [SQUAWKING (SSR Code)] (type) ESTIMATING (significant point) (time) (level) (or DESCENDING FROM (level) TO (level)) [SPEED (filed TAS)] (route) [REMARKS];
... transmitting station b) ESTIMATE (significant point) ON (aircraft call sign);
... receiving station reply (if flight plan details are available) (aircraft type) (destination);
... transmitting station reply [SQUAWKING (SSR Code)] [ESTIMATING] (significant point) (time) AT (level);
Note.— In the event that flight plan details are not available the receiving station shall reply to b) NO DETAILS and transmitting station shall pass full estimate as in a).
c) ESTIMATE UNMANNED FREE BALLOON(S) (identification and classification) ESTIMATED OVER (place) AT (time) REPORTED FLIGHT LEVEL(S) (figure or figures) [or FLIGHT LEVEL UNKNOWN] MOVING (direction) ESTIMATED GROUND SPEED (figure) (other pertinent information, if any);
d) REVISION (aircraft call sign) (details as necessary).
Circumstances Phraseologies
3.5.2 Transfer of control
3.5.3 Change of clearance
3.5.4 Approval request
3.5.5 Inbound release
3.5.6 Radar handover
3.5.7 Expedition of clearance
a) REQUEST RELEASE OF (aircraft call sign); b) (aircraft call sign) RELEASED [AT (time)] [conditions/restrictions]; c) IS (aircraft call sign) RELEASED [FOR CLIMB (or DESCENT)]—; d) (aircraft call sign) NOT RELEASED [UNTIL (time or significant point)]; e) UNABLE RELEASE (aircraft call sign) [TRAFFIC IS (details)].
a) MAY WE CHANGE CLEARANCE OF (aircraft call sign) TO (details of alteration proposed)—; b) AGREED TO (alteration of clearance) OF (aircraft call sign); c) UNABLE TO APPROVE CHANGE TO CLEARANCE OF (aircraft call sign); d) UNABLE TO APPROVE (desired route, level, etc.) [OF (aircraft call sign)] [DUE (reason)] (alternative clearance proposed).
a) APPROVAL REQUEST (aircraft call sign) ESTIMATED DEPARTURE FROM (significant point) AT (time); b) (aircraft call sign) REQUEST APPROVED [(restriction if any)]; c) (aircraft call sign) UNABLE APPROVE (alternative instructions).
a) INBOUND RELEASE (aircraft call sign) [SQUAWKING (SSR Code)] (type) FROM (departure point) RELEASED AT (significant point, or time, or level) CLEARED TO AND ESTIMATING (clearance limit) (time) AT (level) [EXPECTED APPROACH TIME or NO DELAY EXPECTED] CONTACT AT (time).
a) RADAR HANDOVER (aircraft call sign) [SQUAWKING (SSR Code)] POSITION (aircraft position or significant point) (level).
a) EXPEDITE CLEARANCE (aircraft call sign) EXPECTED DEPARTURE FROM (place) AT (time); b) EXPEDITE CLEARANCE (aircraft call sign) [ESTIMATED] OVER (place) AT (time) REQUESTS (level or route, etc.).
X. Phraseologies 10-23
4. Radar phraseologies
Note.— The following comprise phraseologies specifically applicable when radar is used in the provision of air traffic services. The phraseologies detailed in the sections above for use in the provision of air traffic services are also applicable, as appropriate, when radar is used.
4.1 General radar phraseologies
Circumstances Phraseologies
4.1.1 Identification of aircraft
4.1.2 Position information
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