ICAO Airspaces
Controlled: A,B, C, D, E
Uncontrolled: F, G
Switzerland: C, D, E,
Nav Light
VFR Minimum Alt
Sparsely Populated areas, open water: 500ft/150m
Congested areas, open air assembly of people, boats: 1000ft/300
VFR/IFR Cruising levels
Depending on magnetic heading
East (0°-179°): uneven thousand, VFR + 500ft, e.g. VFR 9500 ft, IFR 9000ft
West (180°-360°): even thousand, VFR+ 500ft, e.g. VFR 6500ft, IFR 6000ft
21 Rul