1
Q
Convective sigmet
A
Severe convective (thunderstorm) weather Valid for 2 hours
2
Q
Sigmet
A
Advises for weather hazardous to all weather
lasts 4 hours
ex. Tropical storm
3
Q
Airmet
A
Advises weather less severe than a SIGMET
Text or graphical version (G-airmet)
issues every 6 hours
4
Q
Types of airmets
A
Sierra - IFR or mountain obscurations
Tango - light to moderate turbulence, high wind & wind shear
Zulu - moderate icing and freezing level height
5
Q
Mode C requirements
A
A, B, C airspaces
under the shelf and over B and C airspaces
above 10,000MSL
6
Q
Holding speeds
A
0-6000 200kts
6000-14,000 230kts
14,000+ 265kts IAS
Leg lengths
Below 14,000 1 minute
Above 14,000 1 1/2 minutes
