Rescue work Boating accidents 2 Boats and boating 2 Distress signals 2 Emergency medical services 2 Handbooks, manuals, etc 2 Safety measures 2 Search and rescue operations 2 Civil defense 1 Cross-country skiing 1 Emergency management 1 Emergency medical technicians 1 Equipment and supplies 1 Fire extinction 1 Knots and splices 1 Mountaineering 1 Rappelling 1 Study and teaching 1