longitude
- Prime Meridian is 0 deg and through Greenwich England
latitude
true north
Where longitudinal meridians converge
magnetic north
attracts needle of compass
magnetic variation
angular difference between true and magnetic north
Isogonic lines
Define the magnetic variation for aviation purposes
agonic lines
Where mag and true north are same
true course
Course measured with respect to true north
mag course
time
Coordinated Universal Time (UTC) - based in Greenwich England, 180 longitude is the international date line
Compass Deviation
VFR Cruising altitudes
Define dead reckoning
Computations of direction and distance from a known position (think google maps)
Pilotage
**The GPS consists of three segments
Space segments, user segment, control segment