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 Approaches

Answer 5

50ft RA

Question 6

Minimum RVR for CAT III Approaches

Answer 6

200m

Question 7

What is the Relevant RVR?

Answer 7

RVR for that part of the runway used during high speed phase of the landing down to a speed of 60kts, for take-off all segments are relevant

Question 8

Minimum RVR for Take-off

Answer 8

125m which should be achieved in all the relevant points (TDZ/MID/END)

Question 9

Requirements for LVTO lower than 150m but higher than 125m

Answer 9

•HIRCLs spaced 15m or less and HIELs spaced 60m or less
•90m visual segment available from flight deck at the start of the take-off run (6 center lights) (2 lights are assumed to be below the cockpit 125m)
•Required RVR is achieved for all relevant RVR reporting points

Question 10

Colour of the runway center lights

Answer 10

•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 11

Minimum height to disconnect AP in CAT II Approaches

Answer 11

80ft AGL

Question 12

Minimum Height to disconnect AP in CAT I Approaches

Answer 12

160ft AGL

Question 13

ILS CAT III Alert Height

Answer 13

100ft

Question 14

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

Answer 14

3 or Full depending on MSN

Question 15

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

Answer 15

Between -2.5° and -3.15°

Question 16

Maximum Airport Elevation to perform an autoland

Answer 16

Depends on MSN but normally between 2500ft/9200ft

Question 17

Minimum Aerodrome elevation to perform an Autoland

Answer 17

-1000ft

Question 18

CAT II/CAT III Land light appears at…

Answer 18

350ft AGL

Question 19

Below 200ft Autoland Warning is triggered if…

Answer 19

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

Question 20

Flare appears on FMA at…

Answer 20

40ft AGL

Question 21

THR IDLE appears on FMA at…

Answer 21

30ft AGL

Question 22

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

Answer 22

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

Question 23

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

Answer 23

• No LAND mode
• Incorrect Runway Course

Question 24

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

Answer 24

Red Autoland Light

Question 25

Discontinue a CAT II/III Approach at FLARE height when

Answer 25

No flare + No visual References

Question 26

From which RVR is considered a LVTO

Answer 26

550m, requiring an specific approval below 400m RVR

Question 27

Maximum Taxi Speed for a Low Visibility Take Off

Answer 27

10kts GS

Question 28

Relevant RVR for a Take-Off

Answer 28

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

Question 29

Relevant RVR for a Landing

Answer 29

All the portions until the aircraft reaches a ground speed of 60kts, normally TDZ/MID.

Question 30

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

Answer 30

Yes, in that case MID is the controlling RVR

Question 31

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

Answer 31

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

Question 32

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

Answer 32

In that case, a self assessment of the RVR can be visually made from the cockpit

Question 33

Minimum Visual References to continue a CAT II Approach below DH

Answer 33

3 central approach lights + 1 lateral light

Question 34

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

Answer 34

3 central approach lights

Question 35

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

Answer 35

1 central approach light

Question 36

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

Answer 36

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 37

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

Answer 37

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 38

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

Answer 38

FD Bars will flash

Question 39

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

Answer 39

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