PPC Potential Qs Flashcards
What is civil twilight defined as?
In the morning when the center of the suns disc is 6 degrees below the horizon and ascending, and in the evening when the center of the suns disc is 6 degrees below the horizon and descending
Roughly 25 minutes before/after sunrise/sunset
What is VY?
Best rate of climb
What is the minimum for flying near a forest fire?
5 nautical miles around, 3000’ AGL over the top
What is a UACN01?
Urgent PIREP
What is a UACN10?
A regular PIREP
What is rime ice?
Rough, milky, opaque ice formed by the instantaneous freezing of small supercooled waterdroplets
What is clear ice?
Glossy, clear, or translucent ice formed by the relatively slow freezing of large supercooled water droplets
What is mixed ice?
Both rime and clear icing occurring at the same time
When are GFA’s issued and what are their validity periods?
Issued approximately 30 minutes before the beginning of the forecast period
Validity: 0000Z, 0600Z, 1200Z, 1800Z
Each new set of GFA charts replaces the preceding one
What height are GFAs applicable up to?
24,000’
When are TAFs issued and what are their validity periods?
Issued: approximately 30 minutes before the beginning of the validity period
Valid: forecasts are generally issued every 6 hours with validity periods up to a maximum of 3 hours. Issue and update periods may vary/ Next issue time is stated at the end of each TAF
On a GFA, what units are the horizontal visibility measured in?
statute miles
On a GFA, what are the heights measured in?
ASL
Weather minima in controlled airspace
When in controlled airspace you must maintain:
3 SM visibility
Horizontal distance of 1 SM from cloud
Vertical distance of 500’ from cloud
*Except when taking off or landing, you must maintain 500’ above ground in a control zone
*315
Weather minima in uncontrolled airspace above 1000’ AGL
When in uncontrolled airspace above 1000’ AGL you must maintain:
1 SM visibility
2000’ horizontally from cloud
500’ vertically from cloud
*125
