Things may be different in Canadian parks, but in most parks, calling the rangers is the same as calling SAR. The kind of information provided in this example is truly superb, and a huge factor in a successful operation. Probably the first thing to do would be to send a team out along the route on what is termed a "hasty search."

While that is going on, someone is preparing for the next operations. It is like playing chess, only in the wilderness.

Of course, people who are this careful in their preparations are rarely the ones who get into trouble...