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MATS Part 2 EGKK > Low Visibility Operations - Section 1 Chapter 9 > Flashcards

Low Visibility Operations - Section 1 Chapter 9 Flashcards

1
Q

What is the criteria for requesting Low Visibility Safeguarding?

A
  • Any IRVR is 1000m and is expected to fall below 550m, or
  • The cloud ceiling is 300ft and is expected to fall below 200ft
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2
Q

Describe Low Visibility Safeguarding and what happens?

A
  • Safeguarding is the preparatory step for commencing LVPs
  • ILS Sensitive and Critical Areas are protected
  • Vehicles on the manoeuvring area must obtain an ATC clearance or adhere to airside roads
  • Yankee between W1 and the east of Hangar 6 will be barriered by Airfield Operations to protect the Glide Path Sensitive Area (GPSA).
  • AIR will coordinate the use of CAT III holds
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3
Q

When are LVPs required?

A

Low Visibility Procedures are required when:

  • The touchdown IRVR is less than 550m
  • The cloud ceiling is less than 200ft
  • The sky is obscured

Irrespective of the state of the ILS, lighting, standby power etc

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4
Q

If the touchdown point IRVR is unserviceable, which other visibility values may be used?

A

Midpoint

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5
Q

If the IRVR system is wholly unserviceable, which visibility values may be used instead to determine if LVPs are required?

A

Met visibility

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6
Q

Describe the setup of the AGL power

A
  • There are two independent HV supplies plus a standby generator.
  • If a HV supply fails, the generators will start and be used as the primary supply.
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7
Q

If the secondary power supply to the AGL fails, what should happen?

A
  • ATIS Message
  • Pilots informed by AIR over the RTF for an appropriate period.
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8
Q

What should ATCOs broadcast during the time between the Supervisor calling for safeguarding and the safeguarding being in place?

A

“All vehicles are advised that Low Visibility Safeguarding is now in force. Vehicles on the manoeuvring area must obtain an ATC clearance or adhere to airside roads”

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9
Q

Once safeguarding has been requested where should ATCOs avoid and when should maps be put on?

A
  • Yankee between W1 and the east of Hangar 6, which will be barriered by Ops.
  • W1-H6 map on when Airfield Operations notify via R/T that the barriers are in place
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10
Q

Once safeguarding is in place what should the AIR ATCO test and why?

A

The ‘Low’ RIMCAS Setting

To test and discover any false alerts triggered by safeguarding barriers or other movable obstacles

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11
Q

What setting must RIMCAS be put into once LVPs commence?

A

‘Low’

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12
Q

Can LVPs commence whilst there are infringements of the LSA?

A

No. Timely use of CAT III holds is important.

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13
Q

Is Alpha-Sierra inside or outside of the LSA?

A

Inside

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14
Q

What are the AIR ATCO actions upon the implementation of LVPs?

A
  • If not already, select CAT III stop bars
  • Display an ‘LVP’ strip in the runway bay
  • Inform KK INT/FIN and agree spacing
  • Select RIMCAS visibility to ‘Low’
  • Display ILS Critical Area and ILS LSA maps on ASMGCS
  • Broadcast: “Low Visibility Procedures in operation”
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15
Q

What are the GMC ATCO actions upon commencement of LVPs?

A
  • Select RIMCAS visibility to ‘Low’
  • Display ILS Critical Area and ILS LSA maps on ASMGCS
  • Broadcast: “Low Visibility Procedures in operation”
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16
Q

What is the procedure for LVPs being enforced before safeguarding has been completed?

A
  • Inbound aircraft are passed the IRVR and it must be made clear that LVPs are not in operation
  • Pilots shall decide whether to continue
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17
Q

What are the AIR ATCO actions upon the cancellation of LVPs?

A
  • Remove ‘LVP’ check strip from runway bay
  • Inform KK INT/FIN and agree spacing
  • Select CAT I stop bars using the RGB and coordinate with GMC
  • Select RIMCAS visibility to ‘Normal’
  • Deselect ILS Critical Area and ILS LSA maps on ASMGCS
  • Broadcast: “Low Visibility Procedures are cancelled. Low Visibility Safeguarding remains in place”
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18
Q

What are the GMC ATCO actions upon the cancellation of LVPs?

A
  • Select RIMCAS visibility to ‘Normal’
  • Deselect ILS Critical Area and ILS LSA maps on ASMGCS
  • Broadcast: “Low Visibility Procedures are cancelled. Low Visibility Safeguarding remains in place”
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19
Q

What are the ATCO actions upon the cancellation of Safeguarding?

A
  • Broadcast: “Low Visibility Safeguarding is cancelled”
  • Once opened by Airfield Operations, deselect W1-H6 closure map on ASMGCS
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20
Q

What is the localiser sensitive area (LSA)?

A

A rectangular area 137m either side of the runway centreline between the localizer aerial and the beginning of the runway in use

21
Q

How far back from the Runway Centreline are the CAT III holds?

A

137m

22
Q

When must an arriving aircraft be given a landing clearance or go-around instructions in LVPs?

A

Before they reach 1nm from touchdown.

23
Q

Arrival following a departure in LVPs, where must the departure be in order to issue a landing clearance?

A

The departure must have passed the localiser aerial by the time the arrival reaches 2nm from touchdown, otherwise Go-Around.

24
Q

Arrival following an arrival in LVPs, when must landing clearance be given and can it be reduced?

A
  • 2nm
  • May be reduced to 1nm provided the second arrival is told to “expect a late clearance”
25
Q

In LVPs, ahead of an arriving aircraft, when can nothing be cleared to enter the LSA or GPSA?

A

From 1nm until the arrival has turned away from the runway centreline and is established on a runway exit

26
Q

If the LSA or GPSA are known to be infringed can an aircraft still land?

A

No

27
Q

Which lights indicate the boundaries of the LSA?

A

On runway exits, there are alternating yellow and green lead-off lights and the last yellow light indicates the LSA boundary

28
Q

Can an arriving aircraft be instructed to hold anywhere inside the LSA?

A

No

29
Q

What extra rule is associated with Code E/F aircraft that have vacated 26L at Hotel or Juliet and routed onto 08L in LVPs?

A

Once on 08L they must not be instructed to turn left at Golf onto Juliet as the tail may infringe the LSA

30
Q

When can takeoff clearance be given to aircraft in LVPs?

A

When the LSA ahead of the departing aircraft is NOT infringed.

31
Q

Can an aircraft or vehicle infringe the LSA while an aircraft is rolling for takeoff?

A

No

32
Q

Define the LSA in the case of a departing aircraft

A

Between the departing aircraft and the localiser aerial.

33
Q

What happens to free-ranging during Safeguarding/LVPs?

A

Free-ranging is not permitted once Safeguarding has been requested. However, some authorised vehicles can use a restricted-free ranging procedure.

34
Q

Which vehicles can use the restricted free-ranging procedure during LVOs?

A
  • Airfield Operations
  • Airfield Engineering
  • AFS
    if fitted with a functioning transponder
35
Q

When can restricted free-ranging be allowed?

A

When
* Authorised by the Supervisor
* Safeguarded
* In LVPs due to low cloud

36
Q

Describe the area of restricted free-ranging during LVOs and what a vehicle must do if they wish to proceed beyond this area

A

Juliet/Zulu and everywhere north

Any vehicle wishing to proceed south of Juliet/Zulu is required to be under positive control

37
Q

Can vehicles access the southern perimeter track during safeguarding/LVPs?

A

No

38
Q

Are vehicles allowed enter/exit the runway via Bravo during LVPs and why?

A

No. Because B1 infringes the LSA and there is no B3.

39
Q

When vacating the runway during LVPs, are vehicles allowed to free-range wherever they like?

A

No, vehicles vacating the runway at any point must be issued with a positive clearance.

40
Q

Is Restricted Free-Ranging allowed when LVPs are in force due to low cloud?

A

Yes, with the permission of the Tower Supervisor.

41
Q

Is Restricted Free-Ranging allowed when LVPs are in force due to touchdown IRVR being less than 550m?

A

No.

42
Q

Where are barriers placed on Yankee at the implementation of safeguarding?

A
  • Between W1 and Y3 (to protect the LSA)
  • Border of Block 15/16 up to H6 eastern entrance (to protect the GPSA).
43
Q

What are AFS procedures in Reduced Visibility?

A
  • During safeguarding, AFS may request a positive route
  • During LVPs, AFS shall request a positive route which should be treated as a priority
44
Q

What actions should occur if an ASMGCS screen or individual CWP fails during any Low Visibility Operations?

A

Screen : Staff are to share screens and a new screen should be sourced immediately.

CWP : The screen will be switched to display another CWP

45
Q

If the SMR fails, what will be visible on ASMGCS?

A

Only transponder equipped aircraft/vehicles.

46
Q

What actions should occur if the SMR fails during LVOs?

A
  • All vehicles/aircraft must report when entering and vacating the restricted area
  • Non-transponding aircraft/vehicles are not allowed within the restricted area once an arrival is 4nm from touchdown or a departing aircraft is cleared for take-off
47
Q

What actions should occur if the MDS fails during LVOs?

A

Normal operations may continue using SMR information.

48
Q

What are the possible ways that we could operate during total failure of the ASMGCS in LVOs?

A

*Only operationally essential vehicles will operate within the restricted area
*No aircraft or vehicles shall be cleared to manoeuvre within the restricted area once
- An arrival within 4nm
- A departure has been cleared for takeoff
- Unless the aircraft/vehicle is stationary and its position can be verified
* Aircraft not visible will make position reports and progressive taxi can be given and assured using the AGL
* Arriving aircraft must report when they have vacated and are no longer in the restricted area. For example “report when eastbound on taxiway Juliet”.
* Departing aircraft must report airborne
* In the event of a Go-Around, nothing shall be cleared onto the runway until the GA is identified on the ATM.

49
Q

Can AFS vehicles without a transponder that are responding to an incident enter the restricted area during LVPs?

A

Yes

MATS Part 2 EGKK (13 decks)

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