"Robert M. Gary" wrote in message
om...
"Mike Rapoport" wrote in message
link.net...
"David Megginson" wrote in message
. cable.rogers.com...
Mike Rapoport wrote:

There is no doubt that forecast icing is known icing to the FAA and
the
NTSB. This has been beat to death many times here and in every
aviation
publication.

The problem is (as always) the edge cases:

1. If icing is forecast at 15,000 ft, is flight at 3,000 ft considered
a
flight into known icing? What about a flight at 14,000 ft?


Ice is forecast in clouds and precipitation from the freezing level to
some
altitude. If you are below the freezing level then you are not in the
area
forecast for iciing. This is not an "edge case", the icing is forecast
only
at certain altitudes, the area outside of those altitudes has no
forecast
for icing.

But often you can fly at that altitude in the clouds and get nothing.
The research contiues....

True. I was merely defining the area (horizontal and vertical) which was
considered to be known icing.

Mike
MU-2