Good morning group,

There have been several fatal accidents attributed to polarized lenses in
sunglasses.  Since there is normally little depth perception when flying
above the surface of a body of water, any amount of reflective glare is
helpful to determine the height above the surface.  Polarized lenses cut
glare, diminish or remove that very important visual clue.  Though I haven't
seen any amphibious Lancairs (anyone want to compete for the Schneider
Trophy?), there have been accidents where the craft was maneuvering to land
at strips near water and lack of depth perception was the main contributing
factor.  The solution to this, of course, is to be aware of this limitation
and remove them when near water or opt for non-polarized lenses.

Richard Freilich
(now planeless)