bilko said:Have to confess that i have no idea so i t's about time i found out. Where better to ask?
Blasts on the whistle, markers and internationaly known distress signs etc. Whether made from fire , piles of clothing or whatever i think it would be good to know them all or at least the common ones to use and their meanings.
Over to you
Thanks for posting the question Bilko and all those who replied.
I knew I was a bit out of date ; it was something on my list to find out about before any serious trekking.
Just as a matter of interest anyone know how to find out when these things change - is there a recognised international body that sets standards? (I had a quick look at the United Nations web site but couldn't find anything)