OCS Flashcards
Define and explain what is meant by the term ADS-C
Automatic dependent surveillance – contract (ADS-C): A means by which the terms of an ADS-C agreement will be exchanged between the ground system and the aircraft, via a data link, specifying under what conditions ADS-C reports would be initiated, and what data would be contained in the reports.
Define and explain what is meant by the term CPDLC
A means of communication between controller
and pilot, using data link for ATC communications
Explain what is meant by the term Area of Conlict
For lateral separation purposes, an area within which horizontal separation between particular flights does not exist
Provided safety is not jeopardised, how shall traffic priorities be applied?
• an aircraft known or believed to be in a state of emergency or impaired operation has priority over
all other aircraft; and
• an aircraft landing, or in the final stages of an approach to land, has priority over a departing
aircraft; and
• an aircraft landing or taking off has priority over taxiing aircraft
Where practical and following a request from the pilot, aircraft involved in, or positioning for, what form of activities shall be granted priority?
- ambulance or mercy missions; and
- search and rescue; and
- civil defence or police emergencies; and
- carriage of heads-of-state, heads-of-government, or equivalent dignitaries.
Define coordination
Coordination is the process of negotiation between two or more parties that results in an agreed course of action. To ensure a common understanding and continuity in the provision of an air traffic service to aircraft concerned, coordination shall be carried out between affected sectors/units for all IFR and controlled VFR flights, with agreement being reached on:
- clearances/instructions, as appropriate;
- estimate messages;
- information estimate messages;
- transfers of control;
- revisions to the significant point or level contained in an estimate message;
- approval requests;
- advice or information to be issued to aircraft.
A verbal revision shall be passed to a radar sector when the transfer of control point ETO changes by how many minutes?
3 minutes
What phraseology is used by the TRANSFERRING CONTROLLER for an approval request?
“APPROVAL REQUEST (aircraft callsign, level) VIA (significant point) (any other relevant details)”
Following an approval request, what phraseology is used by the ACCEPTING controller?
“(aircraft callsign) (level) APPROVED [conditions/restrictions]”,
or
“(aircraft callsign) UNABLE TO APPROVE (alternative instructions/reasons)”
Where should the RTF contact point be?
The RTF contact point should be a time but may be a position or level if these can be related to a time by the accepting controller
When would consider effecting a transfer of radio guard prior to an aircraft reaching the transfer of control point?
to enable the accepting controller to issue instructions which would become effective at the transfer of control point
What phraseology is used to effect a transfer of radio guard?
“AT [or PASSING] (time/position/level) CONTACT (unit or operating position) (frequency)”
What is the proviso when issuing an aircraft a clearance to operate within a block of levels?
provided that other aircraft are not denied use of a level within the block
When an aircraft is required to hold, name the elements that make up the clearance for the aircraft to hold
- instructions to join the holding pattern;
- identification of the holding pattern;
- level instructions (at or above the minimum holding level);
- maximum holding speed if required (e.g. for lateral separation or terrain)
In the case where a flight deviated from an ATC clearance due to a TAWS or GPWS alert, weather or other emergency, what procedures apply?
- No control instructions shall be issued to the aircraft making the deviation, and
- Where separation is lost or likely to be lost, instructions shall be issued to other aircraft involved
which will re-establish separation with a minimum of delay, and - Traffic or essential traffic information shall be issued if appropriate.
Is the Auckland Oceanic FIR designated as RVSM airspace? If so between what flight levels?
Yes between F290 and F410 inclusive
When may an RVSM level be used outside the RVSM stratum?
RVSM levels shall not be used outside RVSM airspace when aircraft are in the cruise unless as part of a block clearance.
When are aircraft that are entering airspace within which a larger lateral separation minimum applies rather than that being exited considered to be separated? State the navigation systems requirement to be met when applying this separation
provided that aircraft are flying on tracks that:
- are separated by the appropriate (lateral or radar) minimum for the airspace being exited, and then
- diverge by 15 degrees or more until the applicable larger separation minimum is established, and
- the aircraft have the navigation capability necessary to ensure accurate track guidance.
- Inertial Navigation Systems (INS); or
- Inertial Reference Systems in conjunction with a Flight Management System (IRS/FMS); or
- Global Navigation Satellite System (GNSS) approved aircraft; or
- Required Navigation Performance 10 (RNP 10) or less approved aircraft.
What longitudinal separation standards may be used in the oceanic environment between aircraft climbing, descending or maintaining the same level on the same track?
- T15, or
- T10RNP, or
- D50, or
- D30, or
- MNT Time Separation
State the longitudinal separation minima applied in the oceanic environment between aircraft flying on crossing tracks
T15
State the separation minima applied in the oceanic environment between aircraft flying on reciprocal tracks
- For T10 prior to and after the estimated time of passing (ETP), where the estimated time of passing is determined to be the time at which the aircraft are the closest to each other, or
- Until the aircraft have passed each other by at least D50 or D30 as appropriate.
These standards need not apply when it is confirmed that the aircraft have passed each other by:
- Both aircraft having reported crossing a common exact reporting point, or
- Mutual sighting, provided that there is no possibility of incorrect identification, or
- Another separation standard.
With respect to the oceanic environment, state the occasions where reciprocal track separation minima standards need not apply
- Both aircraft having reported crossing a common exact reporting point, or
- Mutual sighting, provided that there is no possibility of incorrect identification, or
- Another separation standard.
True or false: the VOR/DME lateral separation table published in MATS RAV 5 is approved for us on tracks based on the YSNF and NCRG VOR/DME
True
With respect to an active SUA, within what distance of that SUA will OCS indicate a conflict?
50NM, or profiled to enter a SPACE DEBRIS area
