CAT I/II/III Minimas and Low Visibility

Question 1

Minimum DH for CAT I Approaches

Answer 1

200ft Baro

Question 2

Minimum RVR/Visibility for CAT I Approaches

Answer 2

550m RVR/800m Visibility

Question 3

Minimum DH for CAT II Approaches

Answer 3

Lower than 200ft RA but higher than 100ft RA

Question 4

Minimum RVR for CAT II Approaches

Answer 4

300m

Question 5

Minimum DH for CAT III Single (Fail Passive) Approaches

Answer 5

50ft RA

Question 6

Minimum RVR for CAT III Single (Fail Passive) Approaches

Answer 6

200m

Question 7

Minimum DH for CAT III Dual (Fail Operational) Approaches

Answer 7

25ft RA

Question 8

Minimum RVR for CAT III Dual (Fail Operational) Approaches

Answer 8

100m

Question 9

What is the Controlling RVR?

Answer 9

For landing, the controlling RVR is the TDZ, however if this value is not reported, the MID point value is considered the controlling RVR

Question 10

Minimum RVR for Take-off

Answer 10

150m which should be achieved in all the relevant points (TDZ/MID/END)

Question 11

Recommended power and flaps settings for an LVTO

Answer 11

FLEX and Flaps 2 are recommended for T/O

Question 12

Colour of the runway center lights

Answer 12

•White center lights from threshold to 900m to the end of the runway
•Alternating red/white center lights from 900m to 300m to the end of the runway
•Red center lights for the last 300m

Question 13

Minimum height to disconnect AP in CAT II Approaches (No Autoland)

Answer 13

80ft AGL

Question 14

Minimum Height to disconnect AP in CAT I Approaches

Answer 14

160ft AGL

Question 15

The alert height is…

Answer 15

Height above the runway above which a CAT III approach is discontinued, and a missed approach initiated if a failure occurs in one of the redundant parts of the autoland system or in the relevant ground equipment, if a failure occurs below, FMGC freezes the landing capability

Question 16

ILS CAT III Alert Height

Answer 16

100ft AGL

Question 17

CAT II and CAT III fail passive autoland should be performed with flaps…

Answer 17

3 or Full depending on MSN

Question 18

Maximum Glide Slope Angle to perform CAT II and CAT III autoland

Answer 18

Between -2.5° and -3.25°

Question 19

Maximum Airport Elevation to perform an autoland

Answer 19

Depends on MSN but normally between 2500ft/9200ft

Question 20

Minimum Aerodrome elevation to perform an Autoland

Answer 20

From -2000ft to -1000ft depending on MSN

Question 21

CAT II/CAT III Land light appears at…

Answer 21

350ft AGL

Question 22

Below 200ft Autoland Warning is triggered if…

Answer 22

• Both AP’s trip off
• Excessive Beam deviation
• LOC/GS transmitter or receiver fail
• RA discrepancy of at least 15ft

Question 23

Flare appears on FMA at…

Answer 23

40ft AGL

Question 24

THR IDLE appears on FMA at…

Answer 24

30ft AGL

Question 25

Discontinue a CAT II/III Approach below 1000ft AGL when

Answer 25

• Alpha Floor • AP OFF • Amber Caution • Loss of CAT II/III • Engine Fail

Question 26

Discontinue a CAT II/III Approach below 350ft AGL when

Answer 26

• No LAND mode • Incorrect Runway Course

Question 27

Discontinue a CAT II/III Approach below 200ft AGL when

Answer 27

Red Autoland Light

Question 28

Discontinue a CAT II/III Approach at FLARE height (40ft) when

Answer 28

No flare + No visual References

Question 29

From which RVR is considered a LVTO

Answer 29

550m, requiring an specific approval below 400m RVR

Question 30

Maximum Taxi Speed for a Low Visibility Take Off

Answer 30

10kts GS

Question 31

Controlling RVR for a Take-Off

Answer 31

All Runway portions are considered controlling (TDZ/MID/END)

Question 32

If the TDZ RVR is not reported, which is the controlling RVR? Can we land?

Answer 32

Yes, in that case MID is the controlling RVR

Question 33

If the END RVR is not reported, can we take off?

Answer 33

No, all runway segments are controlling due to a possible rejected take-off

Question 34

If the TDZ RVR is not reported, can we take-off?

Answer 34

In that case, a self assessment of the RVR can be visually made from the cockpit (10 lights if spaced 15m each or depending on aerodrome lights)

Question 35

Minimum Visual References to continue a CAT II Approach below DH

Answer 35

3 consecutive lights (centerline, approach, tdz or edge) + 1 lateral light

Question 36

Minimum Visual References to continue a CAT III Single (Fail Passive) Approach below DH

Answer 36

3 consecutive lights (centerline, approach, tdz or edge)

Question 37

Minimum Visual Equipment to continue a CAT III Dual (Fail Operational) Approach below DH

Answer 37

1 center line light

Question 38

If the reported RVR is below the minimum acceptable for an approach, can we start the approach? Until where?

Answer 38

Yes, until 1000ft, if the RVR is still below minimums, a go around must be performed, if the RVR is above minimums, we can continue until DH

Question 39

If we are below the Approach Ban (1000ft), and the RVR conditions are below minima, can we continue the approach?

Answer 39

Yes, in this case we can continue until minimums because we have passed the 1000ft approach ban, if at minimums we don't have visual reference, we go-around

Question 40

What is the first signal that ground equipment has failed during a low visibility approach?

Answer 40

FD Bars will flash

Question 41

What is the first signal that the Aircraft equipment has failed during a low visibility approach?

Answer 41

If the aircraft detects more than 1/4 dot LOC deviation or 1 dot G/S deviation, the LS scale will flash down to 100ft