IC MET SERVICES - Dgca question bank for pilots

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#1. For non-scheduled National Flights an advance notice (before ETD) is required to be given to AMOs

3 hr

18-24 hr

6 hr

#2. For non-schedules National Flights an advance notice (before ETD) is required to be given to AMSs

3 hr

18-24 hr

6 hr

#3. WAFS provides high quality en-route forecasts of _____ to Met Offices.

high quality en-route forecasts of winds and temperature

SIGMET

TREND

To meet pilots’ needs for meteorological information, in the early 1980s the International Civil Aviation Organization (ICAO) developed the requirements for the World Area Forecast System (WAFS) to include the seamless forecasting of upper air winds, temperatures and significant weather hazards to enhance safety

#4. IMD has ______ Regional Met offices

Chennai Mumbai Kolkata Nagpur Guwahati New Delhi

#5. There are ______ Aerodrome Met Offices

aerodrome met dep

Aerodrome Met Offices (AMO) (Total 18, including 4 MWOs). These are located at major National and International airports They maintain 24 h current weather watch, issue METAR/SPECI, RVR, weather forecasts, TAF, Landing Forecast, Aerodrome Warning, Briefing, VOLMET, ATIS, Radar and Satellite Pictures. They also provide forecasting cover to the associated Aeronautical Met Stations (AMS).

#6. There are ______ Aeronautical Met Stations

Aeronautical Met Stations (AMS) (Total 54). These take Current Weather observations and provide aeronautical forecast after obtaining from AMOs, during their watch hours.

#7. In AIREP the Met Information is contained in Section

Contents of Air Reports
Section 1 – Information on Identification, Position (Lat/Long), Time, FL or Altitude
Section 2 – Operational Information – ETA and Endurance.
Section 3 – Met Information – Air Temp ., Wind, TS, Turbulence, Icing and Humidity (if available)
Example : AIREP IA120 BHP 1200 UTC FL350 MS54 270/40KT TS SCT CB TOP FL 400=

#8. TAF are generally valid for

18 hr

12 hr

9 hr

Terminal Aerodrome Forecasts (TAFs) are forecasts of meteorological conditions at an aerodrome, as opposed to the report of actual, present conditions as given in a METAR.

TAFs usually cover a period of between 9 and 24 hours.

9-hour TAFs are issued every 3 hours, and 12 to 24-hour TAFS every 6 hours.

#9. The validity of Landing Forecast (TREND) is

1 hr

2 hr

3 hr

TREND forecast is valid for 2 hours after the time of the observation of the METAR, and constitutes the final section of the METAR. The change in weather conditions indicated by the code, TREND, can be further qualified by the codes, BECMG, meaning becoming, or TEMPO meaning temporarily.

#10. Landing Forecast is append to

METAR AND SPECI

TAF

AIREP

A variation on the METAR is the Special Report. A Special Report, which is denoted by the abbreviation, SPECI, has the same format as a METAR except that the code SPECI will replace METAR at the beginning of the report. A SPECI will be issued when the weather conditions significantly change in the period between routine observations. A SPECI can be issued to indicate either an improvement or a deterioration in the weather.

#11. Local/Area Forecast is issued three times a day valid for next

18 hr

12 hr

9 hr

Local/AreaForecast. Theseareissuedthree times a day, valid for 12 hr. They are issued at 0700 (valid 0730- 1930), 1300 (valid 1330- 0130), 1800 (valid 1830-0930) IST. Area forecast covers 100 NM or more and Local Forecast 50 NM around. These contain forecast of surface wind, visibility, weather, clouds, upper winds and temperature, and information on sun rise, sunset, warning, etc.

#12. Area Forecast covers an area

100 NM

100 km

50 NM

Local/AreaForecast. Theseareissuedthree times a day, valid for 12 hr. They are issued at 0700 (valid 0730- 1930), 1300 (valid 1330- 0130), 1800 (valid 1830-0930) IST. Area forecast covers 100 NM or more and Local Forecast 50 NM around. These contain forecast of surface wind, visibility, weather, clouds, upper winds and temperature, and information on sun rise, sunset, warning, etc.

#13. Global SIGWX Charts are issued by

WMO

AMO

WAFC

Global SIGWX Charts.
WAFC prepares four SIGWX forecasts of 24 hr validity based on 00, 06, 12 and18 UTC data. These are issued as :
High-level forecasts for levels between FL250 and FL630
Medium-level forecasts for levels between FL100 and FL250

#14. Global SIGWX Charts are valid for

18 hr

24 hr

9 hr

Global SIGWX Charts.
WAFC prepares four SIGWX forecasts of 24 hr validity based on 00, 06, 12 and18 UTC data. These are issued as :
High-level forecasts for levels between FL250 and FL630
Medium-level forecasts for levels between FL100 and FL250

#15. Global SIGWX Charts for high-level are issued for Flight Levels

250 & 630

460 & 100

460 & 260

Global SIGWX Charts.
WAFC prepares four SIGWX forecasts of 24 hr validity based on 00, 06, 12 and18 UTC data. These are issued as :
High-level forecasts for levels between FL250 and FL630
Medium-level forecasts for levels between FL100 and FL250

#16. CODAR is

Radar Report

Coded ARFOR

Upper report from an aircraft, other than weather reconnaissance aircraft

#17. WINTEM is

Actual upper winds

Forecast upper wind and temperature

Actual temperature and upper winds

#18. SIGMET is notice of severe weather for

actual

expected

both

SIGMET. It is the information issued for aircraft in flight by MWOs at Mumbai, Kolkata, New Delhi and Chennai, for their FIRs, for occurrence or expected occurrence of the following en-route weather which may affect safety of aircraft operations.It is issued every 3 hr, commencing 010 UTC. The validity of SIGMET is not more than 4 hr. For Volcanic Ash and Tropical Cyclones it is issued up to 12 hr before the period of validity and is updated every 6 hr. SIGMET are passed to FIC/ACC for further communication to aircraft in flight.

#19. SIGMET is issued for aircraft

in flight

on ground

both

(j) SIGMET. It is the information issued for aircraft in flight by MWOs at Mumbai, Kolkata, New Delhi and Chennai, for their FIRs, for occurrence or expected occurrence of the following en-route weather which may affect safety of aircraft operations.It is issued every 3 hr, commencing 010 UTC. The validity of SIGMET is not more than 4 hr. For Volcanic Ash and Tropical Cyclones it is issued up to 12 hr before the period of validity and is updated every 6 hr. SIGMET are passed to FIC/ACC for further communication to aircraft in flight.

#20. SIGMET is issued by

WAFC

AMO

MWO

(j) SIGMET. It is the information issued for aircraft in flight by MWOs at Mumbai, Kolkata, New Delhi and Chennai, for their FIRs, for occurrence or expected occurrence of the following en-route weather which may affect safety of aircraft operations.It is issued every 3 hr, commencing 010 UTC. The validity of SIGMET is not more than 4 hr. For Volcanic Ash and Tropical Cyclones it is issued up to 12 hr before the period of validity and is updated every 6 hr. SIGMET are passed to FIC/ACC for further communication to aircraft in flight.

#21. SIGMET is valid for

4 hr

8 hr

9 hr

(j) SIGMET. It is the information issued for aircraft in flight by MWOs at Mumbai, Kolkata, New Delhi and Chennai, for their FIRs, for occurrence or expected occurrence of the following en-route weather which may affect safety of aircraft operations.It is issued every 3 hr, commencing 010 UTC. The validity of SIGMET is not more than 4 hr. For Volcanic Ash and Tropical Cyclones it is issued up to 12 hr before the period of validity and is updated every 6 hr. SIGMET are passed to FIC/ACC for further communication to aircraft in flight.

#22. SIGMET is not issued for

Rain

Volcanic Ash

SEV Icing

#23. AIRMET is SIGMET issued by a MWO for the safety of

low-level aircraft

high-level aircraft

both

#24. GAMET is an area forecast in abbreviated plain language for

low level flights

high level flights

all level flights

#25. The validity of Airfield warnings is not exceeding

3 hr

4 hr

6 hr

Weather: Squall (also expected direction), TC, DS, SS, TS, GR, Frost, SN, Hoar Frost or Rime, FZ Precipitation, and Raising Sand or Dust, VA, Tsunami.
Warnings for gliders and light aircraft and helicopters are issued by AMOs, for own and AMSs, and appended to local forecast when wind speed is expected to reach 17 kt or more and are issued with the prefix Warnings for Light Aircraft.

#26. Airfield warning is issued for expected wind speed

30 kt

24 kt

15 kt

Warnings
. Aerodrome Warning.
These are issued by AMOs for expected weather which could adversely affect aircraft on ground and aerodrome facilities and services to ensure safety, proper picketing and mooring of aircraft :
The validity of these warnings is not exceeding 4hr.
Wind: Speed 30kt or more, or
Direction of 20 kt wind changes by 45 degrees.
Weather: Squall (also expected direction), TC, DS, SS, TS, GR, Frost, SN, Hoar Frost or Rime, FZ Precipitation, and Raising Sand or Dust, VA, Tsunami.
Warnings for gliders and light aircraft and helicopters are issued by AMOs, for own and AMSs, and appended to local forecast when wind speed is expected to reach 17 kt or more and are issued with the prefix Warnings for Light Aircraft.
The warnings are passed on to local ATS units for further dissemination over the aerodrome to the operators and others. These are not disseminated beyond the aerodrome of origin. Amendments and cancellations are done as applicable.

#27. Airfield warning is issued for wind direction of 20 kt changes by

45°

30°

60°

#28. Airfield Warning for gliders, light aircraft and helicopters is issued for expected wind speed

15 kt

17 kt

30 kt

#29. Wind Shear Warning is issued for the observed or expected wind shear above runway

up to 500 m

above 500 m

300 m

The warnings are passed on to local ATS units for further dissemination over the aerodrome to the operators and others. These are not disseminated beyond the aerodrome of origin. Amendments and cancellations are done as applicable.
Wind Shear Warning (up to 500 m (1600 ft) above runway).
It is issued by AMOs for the observed or expected occurrence of wind shear which could adversely affect aircraft on approach path, take off path, during circling approach or on the RW during landing and take off. WS above 500m due to topography is also included.

#30. VOLMET is a MET information for aircraft

on ground

in flight

both

(VOLMET. It is a MET information for aircraft in flight. It is of two types:

Data Link VOLMET (D-VOLMET). It provides current METAR, SPECI, 9 hr TAF, SIGMET, Special AIREPS not covered by SIGMET, and where available AIRMET.

. VOLMET Broadcast. It provides METAR, SPECI, TAF, SIGMET by means of continuous and repetitive voice broadcasts. VOLMET Radio Telephony Broadcasts in India are made on HF Channel from Mumbai and Kolkata in turn every half an hour.

#31. VOLMET consists of

SIGMET

TAF only

TAF AND METAR

VOLMET. It is a MET information for aircraft in flight. It is of two types:

Data Link VOLMET (D-VOLMET). It provides current METAR, SPECI, 9 hr TAF, SIGMET, Special AIREPS not covered by SIGMET, and where available AIRMET.

. VOLMET Broadcast. It provides METAR, SPECI, TAF, SIGMET by means of continuous and repetitive voice broadcasts. VOLMET Radio Telephony Broadcasts in India are made on HF Channel from Mumbai and Kolkata in turn every half an hour.

#32. In ROBEX the METAR/SPECI of international aerodromes and their alternates is exchanged

within India

outside India

ROBEX (Routine OPMET Bulletin Exchange). Routine METAR / SPECI of international aerodromes and their alternates are exchanged outside India under ROBEX scheme. Air Reports are also exchanged under ROBEX.

#33. Global SIGWX Charts are issued ______ times a day

Two

Three

Four

#34. Global SIGWX Charts for Medium-level are issued for Flight Levels

150 & 200

100 & 250

100 & 150

#35. In India who compiles a single National SIGWX chart:

New Delhi

Mumbai

Kolkata

Chennai

Chennai for higher and medium level

#36. The Indian National SIGWX chart is made for Medium Levels between Flight Levels

150 & 200

100 & 250

100 &150

four SIGWX forecasts of 24 hr validity based on 00, 06, 12 and18 UTC data. These are issued as :
High-level forecasts for levels between FL250 and FL630
Medium-level forecasts for levels between FL100 and FL250

#37. VOLMET Radio Telephony Broadcast made on HF Channel from

Mumbai only

Kolkata only

both Kolkata and Mumbai

VOLMET Broadcast. It provides METAR, SPECI, TAF, SIGMET by means of continuous and repetitive voice broadcasts. VOLMET Radio Telephony Broadcasts in India are made on HF Channel from Mumbai and Kolkata in turn every half an hour.

~ Mumbai Broadcasts include METARs of Mumbai, Ahmadabad, Chennai, Colombo, Karachi and Male and TAFs of Mumbai, Male and Colombo.

Kolkata Broadcasts include METAR s of Kolkata, Delhi, Dhaka, Yangon and Katmanduand TAFs of Kolkata, Delhi and Ho-Chi-Minh.

#38. The Indian National SIGWX chart is valid for

24 hr

18 hr

12 hr

#39. In India the National SIGWX chart is issued

2 times a day

4 times a day

6 times a day

#40. Individual TS which cover less than 50% area, is termed as

FRQ

ISOL

OCNL

ISOL TS : individual TS, less than 50% area covered;
OCNL TS- well separated TS, 50-75% area covered;
FRQ TS little or no separation between adjacent TS, > 75% area covered

#41. If TS cells have no separation between adjacent TS and cover an area more than 75%, it is termed as

FRQ

ISOL

OCNL

ISOL TS : individual TS, less than 50% area covered;
OCNL TS- well separated TS, 50-75% area covered;
FRQ TS little or no separation between adjacent TS, > 75% area covered

#42. If TS cells are well separated and cover an area 50-75%, it is termed as

FRQ

ISOL

OCNL

ISOL TS : individual TS, less than 50% area covered;
OCNL TS- well separated TS, 50-75% area covered;
FRQ TS little or no separation between adjacent TS, > 75% area covered

#43. The Indian National SIGWX chart is made for High Levels between Flight Levels

150&200

100&250

100&150

FL250 and FL630

#44. Local Forecast covers an area

100 NM

100 km

50 NM

Local/AreaForecast. Theseareissuedthree times a day, valid for 12 hr. They are issued at 0700 (valid 0730- 1930), 1300 (valid 1330- 0130), 1800 (valid 1830-0930) IST.

Area forecast covers 100 NM or more and

Local Forecast 50 NM around.

These contain forecast of surface wind, visibility, weather, clouds, upper winds and temperature, and information on sun rise, sunset, warning, etc.

#45. Nowcasting forecast is valid for:

30 hr

48 hr

less than 24 hr

Finish