Perf 2 Flashcards
What is the Cost Index range?
0 to 999
How does wind change a CP?
A CP moves into the wind
When are you likely to need a PNR?
Areas like the pacific with limited div airfields
What dist down the runway is the touchdown aiming point?
1000ft
What does high humidity do to landing dist?
decreases air density so increases landing dist
Why is it hotter in the tropics?
The sun is directly overhead
What happens in a temperature inversion
Temp increases with height
What is the environmentlal lapse rate?
2º per 1000ft
What are the dry and saturated adiabatic lapse rates?
Dry = 3º per 1000ft Sat = 1.5º per 1000ft
What is dew point?
The temp at which a parcel of air becomes saturated.
What are the 3 actions to create cloud?
- Moisture
- A lifting action
- Adiabatic cooling of the rising air.
What are the different types of fog?
Radiation
Advection
Frontal
What weather is associated with high pressure systems?
- Clear upper skies
- Light winds
- Poor vis at low levels.
What is experivenced approaching a warm front?
- Lowering of cloud
- Poor Vis
- Pressure falls.
What do lenticular clouds indictate?
Standing mountain wave CAT
When is a SPECI issued?
When a critical met condition exists - ie windshear
What does a TEMPO related to?
temp variation in forecasted weather lasting not less than 1 hour or if recuriing less than half the trend or taf period.
What does CAVOK indicate?
- vis greater or equal to 10km
- No cloud below 5000ft or highests MSA
- No precipitation.
