To be deliberately contrary for a change....
They called for a rescue with the only kit they had, a SAR mission was diverted to them quickly and easily (because of the PLB) who contacted them and arranged for their air taxi to get them.

Yes not exactly an appropriate use of a PLB but would it have been better for them to wait until they were in real trouble (heat stroke, frostbite or whatever) and then had a more major rescue mission?