Weather Reporting

Question 1

Define: special air-report.

Answer 1

Routine air-report containing significant weather information.

Question 2

What weather conditions must be present in order to be classified as CAVOK?

Answer 2

❅ visibility ≥ 10 km

❅ no clouds below 5,000 ft AGL

❅ no CB or TCU

❅ no SIGMET

Question 3

Give the form of a routine air-report.

Answer 3

❅ usual position report

❅ wind

❅ temperature

❅ any significant weather observations

Question 4

In what units is RVR measured?

Answer 4

In metres.

Question 5

When should routine air-reports be made?

Answer 5

After passing compulsory reporting points, or every one hour.

Question 6

When would a runway be considered contaminated?

Answer 6

When more than 25 % of the runway is covered in standing water, snow, slush, frost, or ice.

Question 7

Where is RVR usually measured on the runway?

Answer 7

❅ TDZ

❅ mid-point

❅ stop-end

Question 8

What’s the difference between RVR and IRVR?

Answer 8

RVR: obtained by visual observation.

IRVR: obtainted by using instruments.

Question 9

In which cases will runway conditions be reported?

Answer 9

When the runway is wet or contaminated.

Question 10

How is cloud cover reported?

Answer 10

In oktas.

FEW (few): 1-2/8.

SCT (scattered): 3-4/8.

BKN (broken): 5-7/8.

OVC (overcast): 8/8.

Question 11

Define: standing water.

Answer 11

Water on the runway that is deeper than 3 mm.

Question 12

When are routine air-reports not necessary?

Answer 12

❅ when flying in a radar-covered area

❅ when the flight duration is two hours or less

❅ when the aircraft is within an hour of landing

Question 13

What is the unit used when reporting visibility?

Answer 13

Visibility less than 5 km: in m.

Visibility more than 5 km: in km.

Question 14

Why is VOLMET particularly useful?

Answer 14

It can provide arrival data before the destination ATIS is in range.

Question 15

In which cases will braking action be reported?

Answer 15

When the runway is covered with snow or ice.

Question 16

What does it mean if a runway is described as:

(a) dry

(b) damp

(c) wet

(d) containing water patches

(e) flooded

Answer 16

(a) the runway is not affected by meteorological phenomena
(b) the runway is showing a change of colour due to moisture
(c) up to 25 % of the runway is covered in standing water
(d) more than 25 % of the runway is covered in standing water
(e) more than 50 % of the runway is covered in standing water

Question 17

List the braking action parameters, particularly:

❅ code

❅ estimated braking action

❅ related friction coefficient

Answer 17

1 ❅ poor ❅ 0.25 and below

2 ❅ poor to medium ❅ 0.26 to 0.29

3 ❅ medium ❅ 0.30 to 0.35

4 ❅ medium to good ❅ 0.36 to 0.39

5 ❅ good ❅ 0.40 and above

Question 18

When will the braking action be reported as unreliable?

Answer 18

When more than 10 % of the runway is covered by wet ice/snow and/or slush.

Question 19

What does report flight conditions from a controller mean?

Answer 19

Indicate whether you’re flying in IMC or VMC.