There are a number of lessons to be learned.
The simple algorithm:
1) Members never get ahead of the Leader, or behind the designated Sweep.
2) Leader knows the terrain and is willing to backtrack in case of uncertainty. Short-range radio between leader & sweep is massively helpful.
3) Stop & get group together at all trail junctions.
Adherence to this simple set of rules will result in the entire group arriving successfully at the planned exit - or at least S&R finding all members in the same place.
There is an exception: If a member is broken, then the leader is responsible for sending the best choice on the chopper-run.
That is all.
