Unit 9 Flashcards
Latitude
parallel to the equator (0º - 90ª)
Longitude
connect north pole → south pole
(mark direction of true north & south) (0º - 180º)
What is another name for longitude lines?
meridians
Day
time required for Earth to make 1 revolution of 360º
(Earth revolved at 15º/hour)
What are meridians used for?
Used to measure direction from one point to another in degrees from true north
Draw a line from departure point to destination & measure angle that line forms with meridian (at midpoint of course)
True course
course measure on sectional chart
Variation
angle between true north and magnetic north
Other than hard surface runway
Hard surface runway 1500’ to 8069’
Hard-surfaced runways greater than 8096’ or multiple runways
Seaplane bases
MIlitary airports
Other than hard surface runway
Dual-lame divided highway
Primary road
Railroads: single track & double track
Power transmission lines
VFR checkpoints
Underground pipeline
Maximum elevation figure (MEF)
12,500