There had been at least eight rescues over the past four weeks, including two rescues from Mount Aspiring, one from the Cascade Saddle and one at Timaru Creek about three weeks ago.
Det Lee said the national Rescue Co-ordination Centre had also resolved several beacon-activated events without involving police.
In previous years, search and rescue teams could spend several days looking for people, but now with personal locator beacons they could resolve reports within a few hours, he said.