Section 7 Flashcards

1
Q

What is the surface wind measured in?

A

Direction in degrees True

Speed in knots

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2
Q

When would you report a variation, regarding wind direction?

A

60 degrees of more but less than 180 degrees

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3
Q

When would you pass a Gust ?

A

If the max wind speed in 10 or more knots faster than the mean (in a 10 minute average)

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4
Q

If the visibility is less than 800metres how is it measured?

A

Increments of 50 metres

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5
Q

If the visibility is 800metres or more but less than 5km, how is it measured?

A

Increments of 100 metres

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6
Q

When the visibility is 5km or more, how is it measured?

A

In 1km steps

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7
Q

How should you report cloud on a METAR?

A

1- the lowest individual layer

2- the next highest of at least 3 oktas ( SCT, BKN or OVC)

3- the next highest of at least 5 oktas (BKN, OVC)

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8
Q

What does the term CAVOK mean?

A

1- visibility is 10km or more

2- No significant weather at or in the vicinity of the aerodrome

3- no cloud below a level 5000ft above aerodrome elevation or minimum sector altitude

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9
Q

Is the QFE/QNH rounded up or down?

A

Down

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10
Q

When would a SIGMET be issued?

A

If the weather phenomena is reported below-

Thunderstorm 
Heavy hail
Freezing rain
Severe icing 
Severe turbulence
Tropical cyclone
Severe mountain waves 
Heavy dust or sand storm
Volcanic ash cloud
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11
Q

How long is a SIGMET valid for?

A

No usually valid for more than 4 hours

Expect volcanic ash cloud where the period can be up to 12 hours

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12
Q

What weather phenomena would be on an Aerodrome Weather Warning ?

A
Gales
Squalls
Snow
Frost
Thunderstorm
Freezing precipitation
Fog
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