Gen 172 Jbacc

Front 1

Class A Airspace has:

Back 1

Within Radar coverage -

• lower limit above FL180 and upper limit FL600

Outside Radar coverage -

• lower limit FL245 and upper limit FL600

Front 2

Class C Airspace has:

Back 2

• Lower limit FL125 and upper limit FL180 under class A airspace.
• In Control Zones (CTR) of defined dimensions

Front 3

Class D Airspace has:

Back 3

• Control zones of defined dimensions and associated control area steps, upper limit 4,500FT

Front 4

Control Zone

Back 4

A controlled airspace extending upwards from the surface of the earth to a specified upper limit.

Civil CTR: Class C and D

Military CTR: Class C

Front 5

Control Area

Back 5

A controlled airspace extending upwards from a specified limit above the earth.