References: -FTGU pages 184-190 -Transport Canada Study and Reference Guide Glider Pilot -Canada Flight Training Manual- Pilot Navigation : Instructor 40 Minutes 3.02 Measuring the Earth References: -FTGU pages 184-190 -Transport Canada Study and Reference Guide Glider Pilot -Canada Flight Training Manual- Pilot Navigation
Slide 2 : MTPs:
Scale and Units of Measurement
Determining Latitude and Longitude of Positions
Locating Positions Using Latitude and Longitude Co-ordinates
Slide 3 : Scale of a chart
Measurement
Kilometers (1000 meters)
Statute Mile (5280 feet)
Nautical Mile (6080 feet) BC Online Ground School Scale
Slide 4 : BC Online Ground School Scale Scales are shown as a ratio
1:250 000 covers a small area in detail
1:500 000 covers a larger area in less detail
1:1 000 000 covers a very big area in little detail
1:250 000 means that 1 inch on the map = 250 000 inches on the ground (or meters or any other unit)
Slide 5 : Parallels of Latitude:
Run east and west
Circles on earth’s surface parallel to equator
Latitude measured 0 to 90 degrees north or south of equator BC Online Ground School Parallels of Latitude
Slide 6 : Meridians of Longitude:
Run North and South
Are semi-great circles
Longitude measured east and west of Prime Meridian (0 degrees)
International Date Line is meridian 180 degrees BC Online Ground School Longitude and Latitude
Slide 7 : Meridians of Longitude:
Run North and South
Are semi-great circles
Longitude measured east and west of Prime Meridian (0 degrees)
International Date Line is meridian 180 degrees BC Online Ground School Longitude and Latitude
Slide 8 : What is the approximate latitude and longitude of each letter?
______________________ B._______________________
C. ______________________ D. _______________________ A B C D
Slide 9 : Using the internet, try to figure out what is located at each of the following coordinates:
Latitude: 48° 51’ 32” N – Longitude: 002° 17’ 45” E
68°N 70°W
29° 59' N 31° 09' E
45°27'N 75°42'W
Slide 10 : A great circle is an important navigation term.
It refers to an imaginary line on the surface of the earth.
It represents a path that an airplane could fly.
Important characteristics of a Great Circle:
-shortest distance from A to B
-requires a constant change of heading
(compass direction)
-if you flew a great circle all the way around the world, the imaginary line would separate the Earth into two equal halves
The equator is a great circle, but meridians of longitude are only semi-great circles (they only go half way around the world)
Slide 11 : Great circle route from China to Canada – a straight line over the earth that looks curved on a map. The shortest distance from A to B.
Slide 12 : A rhumb line is another imaginary line.
It is a straight line on a map – you hold a constant compass heading.
It is not the shortest distance between two points, but over short distances this hardly matters.
On a globe, it looks like a curved line because the meridians of longitude meet at the poles.
Slide 13 : Azimuth=heading
Slide 14 : Rhumb line or Great Circle?
Slide 15 : Draw a great circle route!
Draw a rhumb line!
Slide 16 : BC Online Ground School 3.02 Confirmation Questions?