Disseminate Weather Information Flashcards
(46 cards)
What does HWAS stand for?
Hazardous Inflight Weather Advisory Service
Controllers must advise pilots of hazardous weather that may impact operations within:
150 NM of their sector
Controllers within commissioned HIWAS areas must:
Broadcast a HIWAS alert on all frequencies, except emergency frequency, upon receipt of hazardous weather info
What is the phraseology for broadcasting a HIWAS alert:
ATTENTION ALL AIRCRAFT, HAZARDOUS WEATHER INFORMATION
(SIGMET, Convective SIGMET, AIRMET, Urgent Pilot Weather Report (UUA), or Center Weather Advisory (CWA), Number or Numbers)
FOR (geographical area) AVAILABLE ON HIWAS OR FLIGHT SERVICE FREQUENCIES.
Controllers outside of commissioned HIWAS areas must
- Advise pilots of the availability of hazardous weather advisories
- Apply the same procedure when HIWAS outlets, or outlets with radio coverage extending into your airspace are out of service.
What is the phraseology for HIWAS outside of the airspace?
ATTENTION ALL AIRCRAFT, HAZARDOUS WEATHER INFORMATION FOR (geographical area) AVAILABLE FROM FLIGHT SERVICE
Terminal facilities have the option to limit hazardous weather information broadcasts:
Tower and approach facilities may opt to broadcast haz weather information alerts only when any part of the area described is within 50 NM of the airspace under their jurisdiction.
What are PIREPable conditions?
- Ceilings at or below 5,000’ (must include cloud base/top reports
- Visibility (surface or aloft) at or less than 5 miles
- Thunderstorms and related phenomena
- Turbulence of moderate degree or greater
- Icing of light degree or greater
- Wind shear
- Volcanic ash clouds
- Sulfur gases
- Braking action advisories in effect
What do you record with PIREPs
- Time
- Aircraft position
- Type Aircraft
- Altitude
- When the PIREP involves icing include:
> Icing type and intensity
> Air temperature in which icing is occuring
Who do you obtain PIREPs from
Directly from the pilot, or if the PIREP has been requested by another facility, you may instruct the pilot to deliver it directly to that facility
Issue pertinent information on observed/reported weather and chaff areas by defining the area of coverage in terms of
Azimuth (by referring to the 12-hour clock) and distant from the aircraft or by indicating the general width of the area and the area of coverage in terms of fixes or distance and direction from fixes
WEATHER/CHAFF AREA BETWEEN (#) O’CLOCK AND (#) O’CLOCK (#) MILES
(#) MILE BAND OF WEATHER/CHAFF FROM (fix and # of miles and direction from fix) TO (fix or # of miles and direction from fix).
What term do you use when describing radar-derived weather?
Precipitation
What terms are used to describe precipitation intensity?
- LIGHT
- MODERATE
- HEAVY
- EXTREME
What is the phraseology for precipitation?
AREA OF (intensity) PRECIPITATION BETWEEN (#) O’CLOCK AND (#) O’CLOCK (#) MILES MOVING (direction) AT (#) KNOTS, TOPS (altitude). AREA IS (#) MILES IN DIAMETER.
What is the lowest displayable precipitation intensity described as?
MODERATE
Describe the highest displayable precipitation intensity as:
HEAVY to EXTREME
When operational/equipment limitations exist, controllers must ensure that the:
Highest available level of precipitation intensity within their area of jurisdiction is displayed.
When requested by the pilot, provide what in regards to weather:
Radar navigational guidance and/or approve deviations around weather or chaff areas.
In areas of significant weather, plan ahead and be prepared to suggest, upon pilot request, the use of alternative routes/altitudes.
An approval for lateral deviation authorizes:
The pilot to maneuver left or right within the limits of the lateral deviation area.
When approving a weather deviation for an aircraft that had previously been issued a crossing altitude, including climb via or descend via clearances:
Issue an altitude to maintain along with the clearance to deviate.
If you intend on clearing the aircraft to resume the procedure, advise the pilot
DEVIATION (restrictions if necessary) APPROVED, MAINTAIN (altitude), (if applicable) EXCEPT TO RESUME (SID, STAR, etc.) AT (NAVAID, fix, waypoint)
If a pilot enters your area of jurisdiction already deviating for weather:
Advise the pilot of any additional pertinent weather which may affect his route.
If traffic and airspace permit, combine the approval for:
Weather deviation with a clearance on course
DEVIATION (restriction if necessary) APPROVED, WHEN ABLE, PROCEED DIRECT (degrees), VECTOR TO JOIN (airway) AND ADVISE.
If traffic or airspace prevent you from clearing the aircraft on course at the time of the approval for a weather deviation:
Instruct the pilot to advise when clear of weather
DEVIATION (restrictions if necessary) APPROVED, ADVISE CLEAR OF WEATHER
When a deviation cannot be approved as requested because of traffic:
Take an alternate course of action that provides positive control for traffic resolution and satisfies the pilot’s need to avoid weather.
UNABLE DEVIATION, FLY HEADING (heading), ADVISE CLEAR OF WEATHER
OR
UNABLE DEVIATION, TURN (# of degrees) DEGREES (left or right) FOR TRAFFIC, ADVISE CLEAR OF WEATHER
