Low Visibility Operations

Question 1

Minimum RVR for T/O? (and for FO?)

Answer 1

125m (550m)

Question 2

How many lights can you see at line up to replace initial RVR?

Answer 2

6 centreline lights (15m spacing)

Question 3

CAT I DH and RVR?

Answer 3

200ft

550/125/75 (only TDZ required)

Question 4

CAT I visual references required?

Answer 4

Elements of approach lighting system or touchdown zone markings

Question 5

CAT I LTS DH and RVR?

Answer 5

200ft (same as CAT I)
450/125/75 (only TDZ required)
(400/125/75 for ILS II/III) (only TDZ required)

Question 6

CAT I LTS visual references required?

Answer 6

3 consecutive lights and lateral element

Question 7

CAT II DH and RVR?

Answer 7

100ft

300/125/75

Question 8

CAT II required visual references?

Answer 8

3 consecutive lights and lateral element

Question 9

CAT III A DH and RVR?

Answer 9

<100ft (not below 50ft)

200/125/75

Question 10

CAT III A required visual references?

Answer 10

3 consecutive lights

Question 11

CAT III B fail operational DH and RVR?

Answer 11

<50ft (or NO DH)

75/75/75

Question 12

What can the minimum RVR required in the midpoint be reduced from and to if using a Rollout Guidance or Control System?

Answer 12

From 125m to 75m

Question 13

What defines a “relevant” RVR?

Answer 13

The section of the runway required for the aircraft to slow to approximately 60 knots

Question 14

What are the reasons to go-around below 1000ft on an autoland?

Answer 14

Loss of AP
Engine failure
Autoland light
Single chime (amber caution)
Triple click (downgrade)

Question 15

What are the reasons to go-around below 100ft on an autoland?

Answer 15

Red autoland light (active below 200ft)

Question 16

What are the 7 causes of the red autoland light illuminating? (When does this light become active?)

Answer 16

Both APs lost
LOC 1/4 dot deviation, above 15ft RA
Loss of LOC above 15ft RA
GLIDE 1 dot deviation, above 100ft RA
Loss of GLIDE above 100ft RA
Difference between both RAs of over 15ft
Long flare
Early/untimely flare

(Active below 200ft)

Question 17

How many approaches can be attempted?

Answer 17

2 consecutively subject to significant weather improvement

Question 18

When do the centreline lights go red and white alternating?

Answer 18

900m from end

Question 19

When do centreline lights go red?

Answer 19

300m from end

Question 20

What is the difference between fail operational and fail passive?

Answer 20

Fail operational means the approach, flare and landing can still be completed automatically in the event of a failure below alert height.

Fail passive is when, with a failure, there is no significant out of trim condition or deviation to flight path, but the landing cannot be completed automatically.

Question 21

When is the latest ATC will initiate LVPs by?

Answer 21

Ceiling <200ft or RVR <600m

Question 22

What distance must a take off alternate be within?

Answer 22

320nm

Question 23

What distance must an adequate aerodrome along the route be within?

Answer 23

380nm (A319)

400nm (A320)

Question 24

What is the approach ban?

Answer 24

1000ft

RVR must be above minimum required for approach to continue past 1000ft, if it reduces below 1000ft you may continue

Question 25

Is ATHR required to be used on an auto land?

Answer 25

Yes, but for Cat 3A and Cat 3B auto lands only

ATHR inop in MEL puts the aircraft into Cat 2 only