Share 'Describe your departments heavy rescue operations'

How are members picked? Experience or seniority. To what level or how often do they train in the disciplines of high angle, confine space, collapse, trench. Manpower? When staffing falls below minimum (vacation, injured etc) do they hire rescue qualified or fill with any member. Fire ground duties? Divers Y/N. And anything else you want to add pertaining to the world of Heavy Rescue