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Revision > Telstar 2 and SCA > Flashcards

Telstar 2 and SCA Flashcards

1
Q

What are the ASEPS separation minima?

A

14nm longitudinally for angles of 0 - 44 degrees.
17nm longitudinally for angles of 45 - 89 degrees.
19nm laterally.
5nm opposite direction.

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2
Q

ASEPS can be applied between flights operating at what levels and within what areas?

A

Between eligable flights at and above FL290.

WIthin the following areas:

Within Shanwick including along 45N from PITAX to 45N30W but excluding a defined area within the SE corner.
Within Gander along 45N at and East of 45N35W.
Within parts of Reykjavik airspace within acceptable radar coverage. (Not South of 57N20W 6230N30W 6030N40W).

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3
Q

From which point within the SE corner can we apply ASEPS to Westbound aircraft from, and which points can we not?

A

We can apply ASEPS between Westbound flights out of OMOKO and PITAX but not from TAMEL or BERUX.

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4
Q

What equipment is needed for ASEPS separations between flights?

A 
ADS-B
ADS-C
CPDLC
RNP4
RSP180
RCP240
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5
Q

Can we apply intervals on flights out of Brest or Madrid?

A

No, we can’t.

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6
Q

Will Brest accept Eastbound traffic that is separated by ASEPS?

A

No, they will not ordinarily accept it.

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7
Q

Can we use ASEPS for Eastbound flights into ATSIX?

A

No.

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8
Q

What are the rules regarding ASEPS aircraft entering Scottish Airspace and catch ups?

A

Scottish require ASEPS flights to have a speed catch up of no greater than M.04. If we cannot achieve this, we must coordinate it with them.

Be careful because Gander does not apply this restriction, so we have to catch it.

The minimum distance of 14nm or greater is required at landfall if the catch up is M.04 or less. Best endeavors shall be used to achieve a minimum distance of 45nm or greater.

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9
Q

How could we turn off ASEPS separations within GAATS+ if we needed to?

A

Request from the GS that the NO ASEPS table is loaded into the system.

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10
Q

What is the T9 / T290 frequency and where are the radio sites associated?

A

128.360

Mount Gabriel in Ireland.
As Pontes in Spain.

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11
Q

What do Shanwick Aeradio advise all flights making POS reports on T9 and T290 to do?

A

Monitor 128.360.

When a flight acknowledges this, a preformatted message is sent to us.

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12
Q

Who responds to all non-urgent flight transmissions on 128.360.

A

Shanwick Aeradio will transcribe messages received on VHF and respond to all non-urgent flight transmissions.

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13
Q

In a GAATS+ message from Ballygirreen, how could we determine whether the message has been received from a flight on the VHF frequency?

A

The suffix “ZX” will be included in the message.

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14
Q

What is DCPC?

A

Direct Controller Pilot Communications.

It is 2-way comms between Shanwick and aircraft.

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15
Q

To avoid audio distortion on the pilot’s side, Best Signal Select is in place on the VCCS. When monitoring or transmitting on 128.360, which receiver should be selected?

A

Both receivers shall be selected, regardless of which transmitter the VCCS selects.

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16
Q

If there is no response from a particular transmitter, what should a controller do.

A

Deselect the chosen transmitter before selecting the other transmitter.

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17
Q

If the quality of signal strength falls below a readable standard, what should a controller do?

A

Notify the GS who will act to suspend the VHF service.

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18
Q

When a flight acknowledged the instruction to monitor 128.360, what does the message from Ballygirreen to us say?

A

ADVISED TO MONITOR CHANNEL 128.360MHz

The DCPC status will also be updated on the flight profile.

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19
Q

Shanwick Aeradio are to notify Shanwick if a flight is unable to monitor 128.360. What are the controller actions if this occurs?

A

Apply loss of criteria procedures where GNSS separation is being applied.

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20
Q

What is the current adaptable time after entering the Ocean that GAATS+ checks the flights DCPC status?

A

4 minutes.

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21
Q

If DCPC status shows that Ballygirreen have not sent to preformatted message, what alert message do we receive?

A

NO VHF CONTACT RECEIVED FOR (ACID) IN SOUTHEAST CORNER

The controller should then contact Ballygirreen to establish the reason for this and apply loss of criteria procedures if the flight is unable to monitor 128.360.

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22
Q

Who is responsible for ensuring that someone is monitoring the frequency 24/7?

A

The GS. The Monitoring Information should be displayed on SIRS and the GS should be informed whenever the Monitoring position is changed.

23
Q

When must headsets be worn to monitor VHF?

A

At all times.

However, the GS may permit us to use loudspeaker during the night when no traffic is planned in on T9 or T290. If these rules are in force and the Planner plans a flight in on T9 / T290, they must advise Enroute and the GS.

24
Q

In response to an urgent or emergency transmission on VHF, what shall the Shanwick controller do?

A

Ascertain which controller has jurisdiction.
Acknowledge the aircraft’s transmission.

The controller with jurisdiction shall then select the TX for the appropriate site and respond with “Shanwick Control”

If there has been no response from the controller with jurisdiction or it is likely that a reasonable time period will pass before the controller is able to deal with the flight, you should respond to the flight by saying “Standby for Shanwick Control”.

25
Q

If 128.360 is in use and urgent communications is required by another controller, what are the actions?

A

Access to 128.360 should be agreed by the controllers involved or an alternate method of communication shall be used for the other flight.

Shanwick Aeradio will monitor and may contact the flight on HF to obtain further information if there is a delay by Shanwick Control.

26
Q

If a clearance is issued to a flight that includes a reroute onto T9 or T290, what does the Planner need to advise Shanwick Aeradio to do?

A

The Planner shall advise Shanwick Aeradio of the need to monitor 128.360.

27
Q

What is Essential Traffic Information and what does it include?

A

Essential Traffic is controlled traffic that is separated from other controlled traffic by less than the standard separation. It is normally passed in situations where ATS surveillance systems are not available.

Essential Traffic Information shall include:

Direction of flight of the subject aircraft concerned.
Type of aircraft.
Cruising level of aircraft and ETA for a reporting point.
Bearing from the aircraft in terms of the 12 hour clock.
Any other useful information.

28
Q

If the VHF frequency has an outage (Either of the TX/RX sites) it is considered unserviceable. How does this effect us?

A

HF and CPDLC become the primary means of communication and GNSS separations shall not be applied.

29
Q

How does a VHF failure effect flights that are already in the Ocean?

A

Flights already in or within 10 minutes of the Ocean shall be permitted to continue as cleared. If neccessary, reclearances with ammended speeds may be sent.

Flights more than 10 minutes from the boundary shall be cleared to operate on T9 / T290 with an alternate separation standard. Planners can continue to clear non-DLM aircraft at DLM levels unless the GS advises otherwise.

If the failure is expected to be long term, a NOTAM will be issued and the CAA informed.

30
Q

What are a controller actions if the VCCS fails?

A

Follow VCCS failure procedures. The GS will advise Ballygirreen who will respond to all transmissions of 128.360.

31
Q

What Airspace is not included in NAT Region DLM Airspace?

A

Airspace North of 80N.
New York Oceanic East FIR.
Airspace where an ATS surveillance service is provided by means of radar or other means. This includes T9 and T290 for approved aircraft equipped with and operating ADS-B and RNP2.

32
Q

For cleared flights, prior to the issuing of FANS connections or ADS-B reports, what does GAATS+ apply the separations based upon?

A

It will apply separations based upon the filed flight plan details.

33
Q

What should be remembered when an aircraft equipage changes and the flight enters another oceanic sector?

A

Update the CNS window to ensure that the CPL contains the correct information.

ADS-B, RSP and RCP and not editable fields.

Equipage status is not included in a CDN so if equipage changes after the CPL has been sent, you must advise the next unit by voice.

34
Q

How are the following displayed in the flight plan?

GNSS
RNP2
VHF

A

GNSS - G
RNP2 - NAV/RNP2
VHF - Y

35
Q

Which items cannot be updated within the CNS window?

A 
ADS-B
VHF
RCP
RSP
RNP2
36
Q

When an aircraft does not have certain equipage, how do you reflect that using the CNS window?

No RCP/RSP
No RNP2
No ADS-B

A

No RCP/RSP - Exclude RNP4 in CNS
No RNP2 - Exclude GNSS in CNS
No ADS-B - Suppress ADS-B in CNS

Remember, when a CPL is received, GAATS+ creates a flight plan according to the equipage in the CPL.

37
Q

What visual indications on sector do you have that two flights are separated by GNSS separations?

A

The antenna symbol in the WAC window.

38
Q

As an Enroute controller, if the Planner clears an Eastbound flight from Madrid, do you receive an inbound flight notification?

A

No, however, the flight strip will appear in your strips 20 minutes prior to the boundary.

39
Q

Explain the latency message.

A

GAATS+ formulates a “welcome message” to confirm that 2 way communication is in place on CPDLC.

This message is reformatted by the NCGW to “SET MAX UPLINK DELAY VALUE TO 300 SEC” which is sent to the flight. This instructs the pilot to set a latency timer, to prevent out of date messages being actioned by the crew.

If the flight receives a CPDLC message and the latency timer is exceeded then the controller may see the following message: ERROR INVALID DATE UPLINK DELAYED IN NETWORK AND REJECTED RESEND OR CONTACT BY VOICE. Controllers shall consider the message content, its validity and may re-issue or amend the message as appropriate.

40
Q

If a flight stops sending ADS-B reports, what will happen and what are the controller actions?

A

A coasting target will be displayed. The data tag will not contain ADS-B level information. “No ADS-B reports” will display in the equipage triangle.

If ADS-B is required for separation the controller will receive an alert for any conflicts. If ADS-C is available, the controller should issue regular DEMAND contracts to verify the aircraft position.

41
Q

What is the ADS-B Timeout SECA?

A

In the SEC, for GNNS separations, GAATS+ will treat a flight as though ADS-B reports are being received until the Timeout state ends. The timeout state ends no later than 3 minutes after the last ADS-B report was received.

Any HF or ADS-C POS reports received during the 3 minutes will be conformance checked as normal. As long as it is correct a conflict check is carried out as it would be if ADS-B was being received.

42
Q

When will the Timeout state end for a flight?

A

No later than 3 minutes after the last ADS-B report was received, or:

When an ADS-B report is received.
When CNS data is modified by the controller.
When GNSS criteria is no longer met.
When the timer expires.

When the Timeout state ends a conflict probe will take place and any conflict alerts highlighted to the controller.

43
Q

Is a loss of criteria (e.g. ADS-B) sufficient grounds for an adjacent centre to refuse to accept an aircraft?

A

No.

44
Q

TIme revisions of how many minutes, or more, shall be passed?

A

Time revisions of 3 minutes or more shall be passed. Additionally, any time revision which results in less than minimum separation shall be passed.

45
Q

According to the TANGO FLAS, which levels are associated with each route?

A

T9 - LASNO to BEGAS - Even Levels.

T290 - ADVAT - GELPO - Odd Levels.

46
Q

From which points on the TANGO routes can you NOT enter the Ocean?

A

BEGAS and GELPO.

47
Q

From which points on the TANGO routes shall flights NOT exit via? (Except in emergency)

A

ADVAT and LASNO.

48
Q

What is the GNSS lateral separation and what equipment do aircraft require in order to be eligible?

A

GNSS lateral separation is 15nm.

Aircraft require:

RNP2
VHF
ADS-B
GNSS

49
Q

Can you fly SLOP on T9 or T290?

A

No.

50
Q

What is GNSS longitudinal separation and what equipment do aircraft require in order to be eligible?

A

GNSS longitudinal separation is 20nm.

Aircraft require:

RNP2
VHF
ADS-B
GNSS

51
Q

Can you apply GNSS separations during climbs or descents?

A

No. Thay can only be applied in level flight.

Controllers shall not issue climbs or descents on T9 or T290 unless the aircraft is in an emergency or to resolve a conflict.

52
Q

If a controller has to issue a climb or descent to resolve an emergency, what should the controller remember to do regarding the CNS window?

A

Deselect GNSS in the CNS window to ensure that the separations shown are accurate. GNSS can be added to the CNS window again once the aircraft has completed the climb / descent.

53
Q

If VHF is not available or there are ADS-B coverage issues and GNSS separations are not available, what would happen?

A

The GS can request that we load the no GNSS table. We should then apply loss of criteria procedures noting that GAATS+ will continue to allow GNSS to be applied until the table is loaded.

Revision (15 decks)

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