Airspace

[InsyleM]

Can some one please explane the diffrent letter classes of airspace in layman's terms.
Thanks,
-Jonathan

[lnuss]

In general terms, Class A is the most restrictive and Class G is the least restrictive. Other than that, the exact rules/meaning for the various classes vary to some degree from country to country. For example, in the U.S. Class A is all airspace from 18,000 feet up to 60,000 feet, while Great Britain, I'm told, has some Class A down to or near sea level, yet the jet altitudes are (I'm told) Class C. You might read this main article on Airspace at Wikipedia.

If you're specifically interested in the airspace as used in the U.S. you might also want to read this Wikipedia article. This latter article also discusses things such as Restricted airspace, Military Operation Areas (MOA), etc.

I'm not sure I can put it in "layman's terms," other than as I stated in my first sentence above, but the restrictions on the various classes have to do with whether you must use Visual or Instrument Flight Rules, whether you need radio contact and/or transponders, specific permission to enter, and other such things.

[InsyleM]

Thanks,
It was in simple enough terms to understand. I'm glad I only fly a sim, I bust airspace rules all the time in FS.

[mgh]

From the 15 March 2007 in the UK, Class C Airspace replaced any existing Class A,
D, F and G Airspace above FL 195 in the London and Scottish FIRs/UIRs.

[Tim_A]

Classes A - E are "controlled airspace"; classes F and G are "uncontrolled airspace". A is the most restrictive, and G is the least.

This chart shows how airspace classifications are applied in the UK: http://www.caa.co.uk/docs/64/2009010...VFRPilotA5.pdf