I don't know if that's true Lloyd.
The actions that define severe turbulence are the same for any aircraft (see below.)
Private pilots, student pilots, and other low-time pilots who fly only on sunny days may not know how turbulence is defined. It doesn't matter if they are in a C-172 or not, I just used that as an indicator for the
possible low experience level of the pilot.
If I recall (and my recollection powers are fading!) there is a specific definition for severe turbulence: (edit: in fact I didn't even recall that Doug had already posted this. Senility! I'm heading for the Home!)
[ QUOTE ]
Airplane behavior:
Turbulence that causes large, abrupt changes in altitude and/or attitude. It usually causes large variations in indicated airspeed. Aircraft may be
momentarily out of control. Report as Severe Turbulence.
Inside the airplane: Occupants are forced violently against seat belts or shoulder straps.
Unsecured objects are tossed about. Food Service and walking are impossible.
[/ QUOTE ]
I've been in C-172s with students and they start calling some moderate chop severe turbulence. Or more often, they'll report moderate turbulence.
Moderate turbulence is BAD folks:
[ QUOTE ]
Turbulence that is similar to Light Turbulence but of greater intensity.
Changes in altitude and/or attitude occur but the aircraft remains in positive control at all times. It usually causes variations in indicated airspeed.
[/ QUOTE ]
All definitions from:
http://www.faa.gov/atpubs/AIM/Chap7/aim0701.html#7-1-23