This is a topic I'd expect Doug Ritter to know a lot about.

I don't have any special personal knowledge other than buying
signal mirrors surplused from airline refurbishment of life raft
kits, but Googling a bit:

Here's a photo of Lufthansa crew practicing with signal mirrors:
( you knew I was going to get that in ... )
http://rides.webshots.com/photo/1097254627028551299bautqq

Wikipedia says (though I don't see a targeted citation) of flight
attendant training:
" Safety training includes, but is not limited to: ...
survival in the jungle, sea, desert, ice, ..."
http://en.wikipedia.org/wiki/Flight_attendant#Training

There should be a fair amount of survival equipment on board,
including 2 days of food per passenger.
http://www.flightsimaviation.com/data/FARS/part_125-209.html

and it seems the crew should know how to use it, per
FARS 121-417(b)(2)(1) and FARS 135-331(b)(2)(1)
http://www.flightsimaviation.com/data/FARS/part_121-417.html
http://www.flightsimaviation.com/data/FARS/part_135-331.html

Here's one school with safety classes:
http://www.flightsafety.com/fs_service_aviation_training_role.php?div=30&code=R
http://www.flightsimaviation.com/data/FARS/part_135-331.html

That web site you found: http://www.etisurvival.com/pil.htm ,
is an excellent find, btw.