In a word, don't. If a member of your party gets lost it reflects on the preparations and skill level of the group as a whole. This isn't a personal attack, just reality. The dynamics that got one lost can get would be rescuers lost too. The best bet is to stay together and get help. Of course, we have our whistle, PSK and know enough to stay put until found, don't we <img src="/images/graemlins/wink.gif" alt="" />