Visibility Flashcards
What are the 2 definitions of visibility (not VMC or IMC)
- Flight Visibility
- Meteorological Visibility
Haze is typically associated with what sort of pressure system
HIGH
In haze, the visible horizon is CLOSER or FURTHER than we think
CLOSER
Objects are CLOSER than we think they are
In haze, where can a pilot obtain better distance visibility
Visibility distance is constant
FLYING LOWER
To see further through the haze layer, where should a pilot fly
ABOVE HAZE
How can a pilot obtain clearer identification of an airfield layout when flying in haze
FLY ABOVE HAZE
Vertical visibility above haze layer allows cleared identification of airfield layouts
What is the visibility range definition of mist
BETWEEN 1000m and 5000m
What is the visbiility range definition of fog
LESS THAN 1000m
What type of fog is prevelent in coastal areas
ADVECTION FOG
What causes advection fog
Moist air mass moving over cooler surface
Air mass temperature drops, humidty increases to saturation point (100%)
What type of fog is difficult to forecast
RADIATION FOG
What type of fog only forms over land
RADIATION FOG
What conditions are required for radiation fog
- Clear / cloudless night
- Light wind (2 - 8 kts)
- Typically form after dawn
What season is radiation fog most likely to occur
Why
AUTUMN
Diurnal variation at its greatest
What type of fog is defined below
The distinction between cloud and fog may become blurred, with an indistinct cloud base
FRONTAL FOG
raindrops on the windshield can do what
- Reflect
- Refract
- Make vision difficult
Flight in drizzle usually results in what visibility
3000m or LESS
Flight in what sort of condition can typically result in zero visibility
FLIGHT IN SNOW
What weather condition should a pilot never fly in
HAIL
During the day when the sun is low to the ground, especially in a hazy condition, how can the best visibility be obtained
FLY OUT OF SUN
Fly with sun behind you
When flying at night, how can better visibility be obtained
FLYING INTO MOONLIGHT
Fly with moon ahead of you
What are the following visibility codes and descriptions
HZ
DU
FU
- HZ - Haze
- DU - Dust
- FU - Smoke
REMEMBER: Fuck You (FU) Smoke!
What are the following visibility codes and descriptions
SA
FG
BR
- SA - Sand
- FG - Fog
- BR - Mist
REMEMBER: BRain MIST
What are the following visibility codes and descriptions
FZ
BL
MI
- FZ - Freezing
- BL - Blowing
- MI - Shallow
REMEMBER: MIami SHALLOWS
What are the following visibility codes and descriptions
PR
BC
SS
- PR - Banks
- BC - Patches
- SS - Sandstorm
REMEMBER: PRanks sounds like BANKS
REMEMBER: Broken Cloud PATCHES
What are the following visibility codes and descriptions
DS
PO
UP
- DS - Dust Storm
- PO - Dust Devil
- UP - Undefined Precipitation
REMEMBER: POor Taz = Taz Devil = Dust Devil
What is the visibility in a forecast reported as 9999
GREATER THAN 10km
What does RVR in a report stand for
RUNWAY VISUAL RANGE
When are RVRs included in a report usually
When visibility is LESS than 1500m
In an RVR report, what does the following mean
R06 / 0450
R06 = Runway designation
0450 = Visibility 450 m
Runway 06 has visibility of 450m
In an RVR report, what does the following mean
R32 / P1500
R32 = Runway designation
P1500 = Visibility greater than 1500m
Runway 32 has visibility more than 1500m
What are the 4 key parameters of CAVOK
- No Cloud below 5000ft
- Visibility of 10km or more
- No CB or TCB
- No significant weather affecting aviation
