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Question 166-1 : Which constant pressure altitude chart is standard for fl50 ? [ Formation assignment ]

850 hpa

Admin .there is a few questions in the exam that take information directly from that table below write these down on a sticky and have them on the wall beside you .1013 hpa = msl.850 hpa = fl50.700 hpa = fl100.500 hpa = fl180.300 hpa = fl300.200 hpa = fl390.any others you can interpolate between these and figure it out .the decrease of 1hpa/27ft is only applicable at the lower levels of the troposphere as you go up and air pressure decreases the change of height per 1 hpa increases at msl 1hpa/27ft at fl180 it's 50ft/hpa and at fl390 it's 105ft/hpa exemple 266 850 hpa.

Question 166-2 : On which of the following aviation weather charts can a pilot most easily find a jetstream ?

Significant weather chart

. 522.the large black lines are jetstreams exemple 270 Significant weather chart.

Question 166-3 : Why are indications about the height of the tropopause not essential for flight documentation in the tropics ?

The tropopause is generally well above the flight level actually flown

exemple 274 The tropopause is generally well above the flight level actually flown.

Question 166-4 : In the taf for delhi during the summer for the time of your landing you note tempo ts .what is the maximum time this deterioration in weather can last in anyone instance ?

60 minutes

Admin .the change indicator 'tempo' and the associated time group should be used to describe expected frequent or infrequent temporary fluctuations in the meteorological conditions which reach or pass specified threshold values and last for a period of less than one hour in each instance and in the aggregate cover less than one half of the forecast period during which the fluctuations are expected to occur exemple 278 60 minutes.

Question 166-5 : How are well separated cb clouds described on the significant weather chart ?

Ocnl cb

Admin .it comes from annex 3 meteorological service for international air navigation appendix 6 . 511 exemple 282 Ocnl cb.

Question 166-6 : The cold front is indicated with a number at position . 254 ?

N°2

exemple 286 N°2.

Question 166-7 : What does the symbol indicate on a significant weather chart . 256 ?

The center of a tropopause 'high' where the tropopause is at fl 400

exemple 290 The center of a tropopause 'high', where the tropopause is at fl 400.

Question 166-8 : Which typical weather situation is shown on the weather chart spacing of the isobars 5 hpa . 257 ?

Flat pressure pattern

Admin .isobars are well spaced we have large pools areas the pressure pattern is very flat exemple 294 Flat pressure pattern.

Question 166-9 : Which of the following weather reports is a warning of conditions that could be potentially hazardous to aircraft in flight ?

Sigmet

Admin .icao annexe 3 met services .sigmet or significant meteorological information is a weather advisory that contains meteorological information concerning the safety of all aircraft .the following are examples of weather phenomena that may be described in a sigmet . thunderstorms. cyclones tropical revolving storms . severe turbulence. severe icing. severe mountain waves. dust or sand storms. volcanic ash exemple 298 Sigmet.

Question 166-10 : In which of the following circumstances is a sigmet issued ?

Severe mountain waves

Admin .icao annexe 3 met services .sigmet or significant meteorological information is a weather advisory that contains meteorological information concerning the safety of all aircraft .the following are examples of weather phenomena that may be described in a sigmet . thunderstorms. cyclones tropical revolving storms . severe turbulence. severe icing. severe mountain waves. dust or sand storms. volcanic ash exemple 302 Severe mountain waves.

Question 166-11 : Does the following report make sense .'metar lszh 182320z vrb02kt 5000 mifg 02/02 q1015 nosig' ?

The report is possible because shallow fog is defined as a thin layer of fog below eye level

Admin .mi shallow fog bc patches of pr partial are only used with fg fog .icao annex 3. 4 4 present weather .mi less than 2 m 6 ft above ground level .the answer the report is possible because shallow fog is defined as a thin layer of fog below eye level is an acceptable definition exemple 306 The report is possible, because shallow fog is defined as a thin layer of fog below eye level.

Question 166-12 : You receive the following metar .'lsgg 120750z 00000kt 0300 r05/0700n fg vv001 m02/m02 q1014 nosig ='.what will be the rvr at 0900 utc ?

The rvr is unknown because the 'nosig' does not refer to rvr

Admin .geneva metar valid on the 12th day of the month at 07h50 utc no wind runway 05 visbility 700m 'no distinct tendency' fog vertical visibility temperature 2°c and dew point 2°c qnh 1014 no change is expected .icao annex 3 .the trend forecast at the end of the metar shall indicate significant changes in respect of one or more of the elements surface wind visibility weather and clouds only those elements shall be included for which a significant change is expected however in the case of significant changes in respect of cloud all cloud groups including layers or masses not expected to change shall be indicated in the case of a significant change in visibility the phenomenon causing the reduction of visibility shall also be indicated when no change is expected to occur this shall be indicated by the term 'nosig' exemple 310 The rvr is unknown, because the 'nosig' does not refer to rvr.

Question 166-13 : What positions are connected by isobars on the surface weather chart ?

Positions with the same air pressure at a given level

exemple 314 Positions with the same air pressure at a given level.

Question 166-14 : What is a trend forecast ?

A landing forecast appended to metar/speci valid for 2 hours

exemple 318 A landing forecast appended to metar/speci, valid for 2 hours

Question 166-15 : What does the expression 'broken bkn ' mean ?

5 7 eights of the sky is cloud covered

exemple 322 5-7 eights of the sky is cloud covered.

Question 166-16 : What does the abbreviation 'nosig' mean ?

No significant changes

exemple 326 No significant changes.

Question 166-17 : In which weather report would you expect to find information about icing conditions on the runway ?

Metar

exemple 330 Metar

Question 166-18 : In which of the following 1850 utc metar reports is the probability of fog formation in the coming night the highest ?

Vrb01kt 8000 sct250 11/10 q1028 becmg 3000 br =

Admin .light wind below 5 kt little or no cloud clear night only one degree between temperature and dew point .visibilty will fall from 8000 m to 3000 m and br mist indicates moist air .this conditions will lead to the formation of radiation fog moist air over land with heat loss from the ground on clear nights exemple 334 Vrb01kt 8000 sct250 11/10 q1028 becmg 3000 br =

Question 166-19 : Which of the following extracts of weather reports could be in accordance with the regulations abbreviated to 'cavok' . msa minus airport elevation equals lszb 10000 ft lszh 8000 ft lsgg 12000 ft lfsb 6000 ft ?

Lsgg 22003kt 9999 sct120 bkn280 09/08 q1026 becmg 5000 br =

Admin .icao annex 3 amendment 74 .1 no cloud below 5000 ft above airfield level or minimum sector altitude whichever is higher .2 no cb or tcu at any height.3 visibility 10 km or more.4 no significant weather.lszb and lszh have cloud below minimum sector altitude msa furthermore lszh has cumulonimbus aroud ts .lfsb has visibility less than 10 km .lsgg meets all the conditions of cavok .note highest minimum sector altitude is defined in icao pans ops part 1 definitions as the lowest altitude which may be used under emergency conditions which will provide a minimum clearance of 300 metres 1000 ft above all objects located in an area contained within a sector of a circle of 46 km 25 nautical miles radius centred on a radio aid to navigation exemple 338 Lsgg 22003kt 9999 sct120 bkn280 09/08 q1026 becmg 5000 br =

Question 166-20 : Within a short interval several flight crews report that they have experienced strong clear air turbulence in a certain airspace what is the consequence of these reports ?

The competent aviation weather office will issue a sigmet

exemple 342 The competent aviation weather office will issue a sigmet

Question 166-21 : At which airport is the following weather development taking place .'taf 060600z 060716 25006kt 8000 bkn240 becmg 0710 ovc200 becmg 1013 23010kt 8000 ovc100 becmg 1316 23014kt 6000 ra sct030 ovc050 = '. 265 ?

Eddl

Admin .assuming the map has been issued at the same time of the taf 06h00 utc this taf covers a period from 07h utc to 16 utc .the warm front might reach loww in the late afternoon or during the night so loww is excluded .lemd is in a pool area no significant change is expected .lfpo will be reached by the warm front in the next hour so between 07h to 13h the weather expected is rain and no rain is expected before 13h . 505.the steadily decreasing cloud base indicates that eddl is corresponding to the taf exemple 346 Eddl

Question 166-22 : What weather conditions are expected at paris airport lfpo around 0550 utc . 266 ?

23014kt 3000 +ra sct008 ovc025 15/13 q1004 nosig =

Admin .a warm front is approaching lfpo . 505.you can expect a low cloud base poor visibility and rain after you will get the warm sector weather warmer air stratus exemple 350 23014kt 3000 +ra sct008 ovc025 15/13 q1004 nosig =

Question 166-23 : What is the optimum flight level between rome and paris according to the significant weather chart . 270 ?

Fl 220

.at fl 220 we are above the the moderate icing and moderate turbulence layer which goes up to fl180 and we are below the jet at fl340 and the clear air turbulence aera cat square n°3 located between fl280 and fl380 exemple 354 Fl 220.

Question 166-24 : Flight shannon to london what amount and type of cloud is forecast for the eastern sector of the route between shannon and london at fl 220 . 286 ?

Individual cumulonimbus

Admin .from the ground to fl270 on the eastern sector of the route the type of cloud forecast are individual cbs .'isol cb' meaning 'isolated cumulonimbus' exemple 358 Individual cumulonimbus.

Question 166-25 : Over amsterdam what amount and general type of cloud would you expect at fl 160 . 287 ?

Mainly 5 to 8 oktas of stratiform cloud in layers

Admin .broken bkn = 5 to 7 oktas .overcast ovc = 8 oktas .lyr = layer = stratiform cloud .the cloud base is from below fl 100 up to fl180 there is moderate icing up to fl130 and moderate turbulence up to fl180 exemple 362 Mainly 5 to 8 oktas of stratiform cloud in layers.

Question 166-26 : To what extent is munich covered by clouds . 288 ?

5 to 8 oktas

Admin . 530.the cloud cover classification is .few 1/8 to 2/8 cloud coverage .sct scattered 3/8 to 4/8 cloud coverage .bkn broken 5/8 to 7/8 cloud coverage .ovc overcast 8/8 .for munich we have bkn and ovc so 5 to 8 oktas exemple 366 5 to 8 oktas.

Question 166-27 : The following weather message eddm 241200z 2413/2422 vrb03kt 1500 br ovc004 becmg 2415/2417 00000kt 0500 fg vv002 tempo 2022 0400 fg vv001 is a ?

9 hour taf

Admin .this is a forecast message valid on the 24th day of the month published at 12h00 utc .the validity of a taf is stated in the taf .eddm 241200z 241322 .13h00 utc to 22h00 utc = 9 hours exemple 370 9 hour taf.

Question 166-28 : In metar messages the pressure group represents the ?

Qnh rounded down to the nearest hpa

Admin .qnh rounded down due to safety reasons exemple 374 Qnh rounded down to the nearest hpa.

Question 166-29 : While approaching your destination aerodrome you receive the following message rvr runway 23 400m.this information indicates the ?

Length of runway which a pilot in an aircraft on the ground would see on the threshold of runway 23

exemple 378 Length of runway which a pilot in an aircraft on the ground would see, on the threshold of runway 23.

Question 166-30 : What is the meaning of the abbreviation sct ?

3 4 oktas

exemple 382 3 - 4 oktas

Question 166-31 : Marseille information gives you the following meteorological information for ajaccio and calvi for 1600 utc .ajaccio wind 360°/2 kt visibility 2000 m rain bkn stratocumulus at 1000 ft ovc altostratus at 8000 ft qnh 1023 hpa .calvi wind 040°/2 kt visibility 3000 m mist few stratus at 500 ft sct ?

1000 ft at ajaccio and 9000 ft at calvi

Admin .the requirements for cloud to be considered a ceiling is more than 4 oktas .ajaccio .the bkn cloud at 1000 ft is at a lower level than the ovc cloud at 8000 ft .therefore the bkn 5 to 7 oktas cloud at 1000 ft is the start of the ceiling .at calvi .the few and sct layers are lower than 4 oktas therefore the ovc 7 to 8 oktas cloud at 9000 ft is the start of the ceiling exemple 386 1000 ft at ajaccio and 9000 ft at calvi.

Question 166-32 : To which aerodrome is the following taf most applicable .taf 231019 24014kt 6000 sct030 bkn100 tempo 1113 25020g38kt 2500 +tsra sct008 bkn025cb becmg 1315 28012kt 9999 sct025 tempo 5000 shra bkn020 becmg 1719 27008kt 9999 sct030 . 291 ?

Loww

Admin .we have a tempo between 11h and 13h showing the passage of a front thus lemd and ekch can be eliminated the cold front east of ekch is passed at least 5h ago .now behind a cold front the visibility outside precipitation is good and the precipitation is showers and it's what the taf indicates between 13h to 19h this situation concerns loww and the forecast wind also indicates loww lfpg will have strong wind during this period exemple 390 Loww.

Question 166-33 : Refer to the following taf extract .becmg 1218/1221 2000 br bkn004 becmg 1221/1224 0500 fg vv001.what visibility is forecast for 2400 utc ?

500 m

exemple 394 500 m.

Question 166-34 : Refer to the following taf extract .becmg 1218/1221 2000 br bkn004 becmg 1221/1224 0500 fg vv001.what does the abbreviation 'vv001' mean ?

Vertical visibility 100 ft

exemple 398 Vertical visibility 100 ft.

Question 166-35 : What does the term metar signify ?

A metar signifies the actual weather report at an aerodrome and is generally issued in half ho y intervals

exemple 402 A metar signifies the actual weather report at an aerodrome and is generally issued in half-hourly intervals.

Question 166-36 : How long from the time of observation is a trend in a metar valid ?

2 hours

exemple 406 2 hours.

Question 166-37 : What is a speci ?

A special aerodrome weather report issued when a significant change of the weather conditions have been observed

exemple 410 A special aerodrome weather report, issued when a significant change of the weather conditions have been observed.

Question 166-38 : Refer to the following taf extract .becmg 1218/1221 2000 bkn004 becmg 1221/1224 0500 vv001.what does the 'becmg' data indicate for the 18 to 21 hour time frame ?

The new conditions are achieved between 1800 and 2100 utc

exemple 414 The new conditions are achieved between 1800 and 2100 utc

Question 166-39 : Refer to the following taf extract .becmg 1218/1221 2000 br bkn004 becmg 1221/1224 0500 fg vv001.what does the abbreviation bkn004 mean ?

5 7 oktas ceiling 400 ft

exemple 418 5 - 7 oktas, ceiling 400 ft.

Question 166-40 : Refer to the following taf extract .becmg 1218/1221 2000 br bkn004 becmg 1221/1224 0500 fg vv001.what does the abbreviation 'prob30' mean ?

Probability of 30%

exemple 422 Probability of 30%.


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