E/w compass acceleration error
ANDS (accelerate north, decelerate south)
N/s compass error
From north = lag/opp, from south = lead
Compass variation
East is least (subtract), west is best (add)
Cruising 0-179 course
odd + 500
VFR altitude for 180-359 course
even + 500
Airport beacons (green and white)
lighted land
Airport beacons (yellow and white)
lighted sea
Airport beacons (green and yellow)
heliport
Airport beacons (green and two white)
military