Sunglasses for soaring

Brent Mayes wrote:
I guess this is a stupid question, but why are non
polarized lenses better for soaring?


Getting involved in this fight on this news group is about as productive
as debating the merits of a 2-33 but, for the record, many organizations
actively discourage the use of polarized sunglasses for flight operations.

From the FAA:

"The use of polarized sunglasses should be discouraged, since they can
reduce or effectively eliminate the visibility of instruments that
incorporate anti-glare filters or can interfere with visibility through
an aircraft windscreen due to striations in some laminated materials."

From: Flight Safety Foundation

www.flightsafety.org/hf/hf_jul-aug90.pdf

From NASA

http://asrs.arc.nasa.gov/callback_issues/cb_205.htm

In the old days (at least decade ago) I know that U.S. Navy issue
sunglasses specs specified non-polarized lenses. I have no idea if that
has been updated or if the USAF had different ideas.


--

Peter D. Brown
http://home.gci.net/~pdb/
http://groups.yahoo.com/group/akmtnsoaring/