(Rich Kiray) wrote in message . com...
From a visibility standpoint, I recommend the use of the older iPAQs
for use in the cockpit - strictly from a visibility standpoint. I'm
using an iPAQ3835 with a simple screen protector and no back lighting.
The display is quite easy to read, even with polarized sun glasses.

The 3800 series has a reflective display, so is visble in full
sunlight even without backlighting. The 36/3700 have a transmissive
display which requires a backlight. The 3900 and later have a
transflective display which combines the best features of both. I have
found that the 3800 and 3900 displays are equally visible in direct
sunlight, but the 3900 is better in dim lighting with the backlight
on.