Which aeronautical chart symbol indicates a Control Zone boundary 2509 ?
Formation > assignment
Which aeronautical chart symbol indicates an uncontrolled route 2509 ?
Which aeronautical chart symbol indicates the boundary of advisory airspace 2509 ?
Which aeronautical chart symbol indicates a non compulsory reporting point 2509 . 
Which aeronautical chart symbol indicates a compulsory reporting point 2509 . 
Which aeronautical chart symbol indicates a waypoint 2509 . 
Which aeronautical chart symbol indicates an unlighted obstacle 2509 . Question 163-8
Which aeronautical chart symbol indicates a lighted obstacle 2509 . Question 163-9
Which aeronautical chart symbol indicates a group of unlighted obstacles 2509 . Question 163-10
Which aeronautical chart symbol indicates a group of lighted obstacles 2509 . Question 163-11
Which aeronautical chart symbol indicates an exceptionally high unlighted obstacle 2509 . Question 163-12
Which aeronautical chart symbol indicates an exceptionally high lighted obstacle 2509 . Question 163-13
What the meaning of aeronautical chart symbol n°15 2509 Aeronautical ground light. . Question 163-14
What the meaning of aeronautical chart symbol no 16 2509 Aeronautical ground light. . Question 163-15
Which aeronautical chart symbol indicates an aeronautical ground light 2509 Aeronautical ground light. . Question 163-16
Which aeronautical chart symbol indicates a lightship 2509 Aeronautical ground light. . Question 163-17
Given a polar stereographic chart of northern hemisphere whose grid aligned with zero meridian grid track 344° longitude 115°00'w calculate true course Aeronautical ground light. let's assume airplane at latitude 70°n true course = 344° 115° = 229° ninorr just remember simple quote grid track = true track + west longitude or east longitude so in this case 344 = x + 115 x = 344 115 x = 229. Question 163-18
A straight line drawn on a lamberts conformal conic chart between two positions of different longitude the angular difference between initial true track and final true track of line equal to Aeronautical ground light. chart convergency means rate at which meridians drawn on a chart are converging if you drawn a line between two positions of different longitude angular difference between initial true track the final true track equal to chart convergency. Question 163-19
If chart scale 1 500 000 what earth distance would be represented 7 cm on chart Aeronautical ground light. 7 cm x 500 000 cm = 3 500 000 cm = 35 000 m (or 35 km). Question 163-20
What the constant of cone a lambert conic projection whose standard parallels are at 50°n and 70°n Aeronautical ground light. Constant of cone (convergency factor) the ratio between top angle of unfolded cone 360° or sine of parallel of origin the parallel of origin about half way between standard parallels midway between 50°n 70°n 60°n sin of 60° = 0 866. Question 163-21
On a direct mercator projection a particular chart length measured at 30°n what earth distance will same chart length be if measured at 60°n Aeronautical ground light. direct mercator chart earth distance along a parallel of latitude known as 'departure' earth distance between two meridians along a parallel of latitude (departure) = difference of longitude x 60 nm x cos latitude cos 30 = 0 866 cos 60 = 0 5 if example length on chart 5° of longitude measures 10 cm long distance on earth at 30°n is distance = 5° x 60 nm x 0 866 = 260 nm at 60°n since the direct mercator chart of rectangular shape 10 cm = 5° of longitude also distance = 5° x 60 nm x 0 5 = 150 nm. Question 163-22
How does scale vary in a direct mercator chart the scale Increases with increasing distance from equator. on earth 1° of longitude = 60 nm at equator at 45°n or s 1° of longitude = 60 nm x cos45° = 42 5 nm if you look at a direct mercator chart scale between each degrees of longitude remains unchanged even if you are at 30°n 45°n or 60°n scale increases with secant of latitude. Question 163-23
How does chart convergency change with latitude in a lambert conformal projection It constant does not change with latitude. meridians are converging at a constant rate regardless of latitude. Question 163-24
How does convergency of any two meridians on earth change with varying latitude It changes as sine of latitude. meridians are converging at a constant rate regardless of latitude. Question 163-25
Grid heading 299° grid convergency 55° west and magnetic variation 90° west what the corresponding magnetic heading It changes as sine of latitude. 'convergence east true track least' or 'convergence west true track best' grid convergency 55° west 299° + 55° = 354° true track 'variation east magnetic least' or 'variation west magnetic best' magnetic variation 90° west 354° + 90° 084° magnetic heading. Question 163-26
Where on a direct mercator projection the chart convergency correct compared to earth convergency It changes as sine of latitude. a cylindrical projection based on equator a direct mercator projection chart convergency = earth convergency at equator convergency the angle of inclination between two selected meridians measured at a given latitude is equal to difference between great circle directions measured at each meridian. Question 163-27
A route a to b drawn on a polar stereographic chart with grid aligned with greenwich meridian the true track of straight line at a 060° when passing meridian 100°e true track 090° the grid track of this route on chart It changes as sine of latitude. the easiest way to solve this exercice to draw situation . Question 163-28
The standard parallels of a lambert chart are 26°n and 48°n and stated scale 1 2 500 000 which statement correct The scale at 28°n smaller than scale at 24°n. at 26°n 48°n stated scale correct (1 cm = 2 500 000 cm) on a lambert chart scale contracts between standard parallels expands outside so scale at 28°n smaller than scale at 24°n. Question 163-29
Which statement correct about scale of a polar stereographic projection of northern polar area The scale reaches its minimum value at north pole. on a polar stereographic chart meridians are straight lines originating from pole parallels of latitude are arcs of circles centred at pole the scale correct at pole elsewhere it expands as sec² (1/2 co latitude) within 1% from latitudes 90° to 78° within 3% from latitudes 78° to 70°. Question 163-30
Which statement correct about scale of a lambert projection The scale reaches its minimum value at parallel of origin. the lambert conformal projection what most of today's aeronautical charts are based on on a lamberts chart scale correct at standard parallels (as this where paper touches reduced earth) since surface of reduced earth bulging out from paper between standard parallels it will have to be squashed in order to fit onto paper this will then lead to a smaller scale the area between standard parallels. Question 163-31
A route flown from 80°s 100°w to 80°s 140°e at 180°e/w grid track gt and true track tt on a polar stereographic chart whose grid aligned with greenwich meridian are respectively The scale reaches its minimum value at parallel of origin. draw situation img /com_en/com061 598 jpg those questions are not looking your calculation skill but your facility to visualize a situation. Question 163-32
A route flown from 85°s 100°e to 85°s 140°w at 180°e/w grid track gt and true track tt on a polar stereographic chart whose grid aligned with greenwich meridian are respectively The scale reaches its minimum value at parallel of origin. draw situation img /com_en/com061 599 jpg those questions are not looking your calculation skill but your facility to visualize a situation. Question 163-33
The positions a 30°00'n 017°30'e and b at longitude 30°00'n 023°30'e are plotted on a lambert chart with a constant of cone of 0 5 a and b are connected a straight line the true track measured at a 088 5° what the true track measured at b The scale reaches its minimum value at parallel of origin. draw situtation img /com_en/com061 601 jpg if we were on a mercator chart we would have a curve blue line the great circle track a straight line the rhumb line in northern hemisphere our arrival track at b will be more than our departure track at a simply calculate convergency = 6° x 0 5 = 3° true track at b = 88 5° + 3° = 91 5°. Question 163-34
A route flown from 85°s 100°e to 85°s 140°w at 160°e grid track gt and true track tt on a polar stereographic chart with a grid orientated on 180° meridian are respectively The scale reaches its minimum value at parallel of origin. img /com_en/com061 604 jpg . Question 163-35
A straight line from a 75°s 120°e to b 75°s 160°e drawn on a polar stereographic chart when passing meridian 155°e true track The scale reaches its minimum value at parallel of origin. img /com_en/com061 607a jpg img /com_en/com061 607b jpg drawn situation answer becomes simple clear. Question 163-36
On a mercator's projection distance between 17°n 035°e and 17°n 040°e 5 cm the scale at 57°n approximately The scale reaches its minimum value at parallel of origin. on a mercator chart meridians of longitude are parallel lines 5 cm distance at 17°n = 5 cm at 57°n distance on earth between two points distance on earth = change of longitude x cos latitude distance on earth = (5°x 60') x cos57° distance on earth = 164 nm so we can say that 5 cm on chart = 164 nm on earth 164 nm x 1 852 = 303 728 km 303 728 km x 1000 = 303 728 m 303 728 m x 100 = 30 72 800 cm 30 72 800 cm / 5 cm = 6 074 560 the scale at 57°n approximately 1 6 074 560. Question 163-37
A straight line from a 53°s 155°e to b 53°s 170°w drawn on a lambert conformal conical chart with standard parallels at 50°s and 56°s when passing 175°w true track The scale reaches its minimum value at parallel of origin. draw situtation img /com_en/com061 616a jpg img /com_en/com061 616b jpg we can go calculation change of longitude = 35° convergency = change longitude x sin latitude convergency = 35° x sin 53° = 28° departure track at a 090° + 28° = 118° track on arrival at b = 090° 28° = 062° at half way between a b track 090° 175°w on last part of flight so our true track will be less than 090° more than 062° special thanks to aluque the correction. Question 163-38
Route a b drawn on a polar stereographic chart with grid aligned with greenwich meridian the true track of straight line at a 75°s 010°w 080° what the grid track when passing meridian of 050°e The scale reaches its minimum value at parallel of origin. at 'a' true track 080° convergency = change of longitude datum 'a' meridian convergency = 000° 010°w = 10° convergency direction from grid north to true north at 'a' meridian convergency direction 10°west convergency west = true track best grid track = true track convergency = 080° 10°w = 070° when passing meridian of 050°e since grid track constant along whole track grid track remains 070°. Question 163-39
Route a b drawn on a polar stereographic chart with grid aligned with greenwich meridian the true track of straight line at a 75°n 010°w 080° what the grid track when passing meridian 050°e The scale reaches its minimum value at parallel of origin. img /com_en/com061 621 jpg at 'a' true track 080° convergency = change of longitude datum 'a' meridian convergency = 000° 010°w = 10° convergency direction from grid north to true north at 'a' meridian convergency direction 10°east convergency east = true track least grid track = true track + convergency = 080° + 10°e = 090° when passing meridian of 050°e since grid track constant along whole track grid track remains 090°. Question 163-40
A straight line from a 53°n 155°w to b 53°n 170°e drawn on a lambert conformal conical chart with standard parallels at 50°n and 56°n when passing meridian 175°e true track The scale reaches its minimum value at parallel of origin. change of longitude between a b 155°w to 170°e (by oppposite greenwich meridian) = 35° rhumb line track from a to b 270°true difference between great circle track rhumb line track at a specified position called conversion angle the value of conversion angle can be calculated as half value of convergency convergency = difference of longitude x sin(mean latitude) the great circle track at a is 270° + conversion angle conversion angle = 0 5 x 35° x sin 53° = 14° departure track (great circle) is 270° + 14 ° = 284° from a to meridian 175°e great circle track decreases convergency 284° (difference of longitude x sin(mean latitude)) difference of longitude = 155°w to 175°e = 30° 284° (30° x sin53°) = 284° 24° = 260°.
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