The freeing of persons from threatening or dangerous situations by prompt and vigorous action. There are three general classes: (a) heavy, activity that involves the use of complicated tools, equipment, and procedures; (b) light, a activity by simple means and with minimum equipment; and (c) medium, a activity using more specialized tools and equipment than are standard in an ambulance.
To free a person from a hazardous situation such as entrapment in an automobile, trench, cave, or burning building, or from the site of a hazardous material spill.