ATSC 231 Block 2 Exam Questions and Correct Answers (Verified Answers)
What are sigmet used to alert? - Answer- CONUS for- severe or greater turbulence, severe icing, widespread dust/sand storms, volcanic ash, tropical cyclones
What is the purpose of sigmets? - Answer- Provides aircraft ope...
ATSC 231 Block 2 Exam Questions
and Correct Answers (Verified
Answers)
What are sigmet used to alert? - Answer- CONUS for- severe or greater turbulence,
severe icing, widespread dust/sand storms, volcanic ash, tropical cyclones
What is the purpose of sigmets? - Answer- Provides aircraft operators and aircrews
notice of potentially hazardous en route phenomena
Convective-TS
CONUS- everything else
What are convective sigments used to alert? - Answer- obscured, embedded,
widespread, squall lines, isolated severe.
Are sigmets scheduled? - Answer- They are nonscheduled and may be reported as
urgent USW. n-y (no s t z) and numerical
a renumbered at 0000Z
How long are sigmets are valid? - Answer- Volcanic ash-6 hrs, outlook 12, and reissued
every 6
all other sigmets are 4hrs
Who is responsible for issuing airmets and gmets? - Answer- The Meteorological Watch
Office
What are the purpose of Airmets and Gmet? - Answer- gmet-Graphical representation
of the Airmet and Better quality and more precise that the text Airmet
airmet- en route wx, lower risk than sigmet but still cause problems to a/c ops
When are airmets scheduled? - Answer- They are 4 times daily and valid for 6 hrs.
What about Sierra airmet? - Answer- ifr conditions
ceiling <1000' and visi <3sm
more than 3.000 sq mi
mountain obstructions also
What about Tango airmet? - Answer- moderate turbulence
sustained surface winds equal or > 30kts
, non convective LLWS
What about Zulu airmet? - Answer- moderate icing
shows freezing levels ( may have multiple)
How long is gmet valid? - Answer- 3hr time step
What gov agency is responsible for issuing CWA? - Answer- The center weather
advisory unit located at ARTCC
What are the purpose of CWAs? - Answer- They are aviation warnings for conditions
meeting or approaching national in flight advisory crit (airmet, sigmet, conv sigment)
What is the purpose of Meteorological Impact Statements MIS? - Answer- They are non
technical plain language product primarily for FAA traffic managers and those involved
with planning A/c routing.
CWA issue and crit - Answer- issue: 2 hours
crit: AWC has not issued a wx advisory, refine or update advosry
MIS issue and crit - Answer- issue: not exceed 48h and as long as CWSU says
crit: cause of disruption, area, alt, movement
What gov agency is responsible for AC and SAW? - Answer- Storm Prediction Center
What is purpose of AC (convective outlook)? - Answer- aviation watch notif messages,
public severe TS watch, public tornado watch
provides cons us w potential for severe and mod severe convc
What is purpose of SAW (aviation watch notification messages)? - Answer- alert
aviation community, media, and emergency managers forecast of organized TS
potential to produce tornadic and for sever wx
What is crit for AC severe TS? - Answer- >50kts, >1" hail, tornados
What are three types of SAW? - Answer- aviation watch notif messages AWW
public severe TS watch notif message
Public tornado watch notif message
What about aviation watch notif messages? - Answer- alerts avit community, non
scheduled, event driven, parallelogram
-hail size, surface conv wind gusts, max tops, mean storm motion vector
What about tornado and severe TS public notif messages? - Answer- >50kt, >1"hail,
tornado
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