Search & Rescue Operations, PPE & SCBA Safety

Search & Rescue Operations, PPE & SCBA Safety

Protecting human life is the primary mission of the fire service. Fire officers must ensure search and rescue operations are conducted rapidly and systematically while maintaining strict responder safety through complete Personal Protective Equipment (PPE) ensembles, Self-Contained Breathing Apparatus (SCBA) air management, and Rapid Intervention Team (RIT) readiness.

---

Search & Rescue Operations

Search and rescue operations are divided into two distinct, sequential phases:

+-------------------------------------------------------------------------+
|                    SEARCH & RESCUE DUAL-PHASE PROTOCOL                  |
|                                                                         |
|  [PRIMARY SEARCH]   --> Rapid, systematic search during active fire     |
|                          (Focus: High-risk areas & live victims)        |
|                                     |                                   |
|                                     v                                   |
|  [SECONDARY SEARCH] --> Meticulous, post-fire-control search            |
|                          (Executed by a DIFFERENT fresh crew)           |
+-------------------------------------------------------------------------+

Primary Search vs. Secondary Search

• Primary Search: A rapid, systematic, and thorough search conducted before or during fire suppression operations to locate and rescue live victims. Search teams follow systematic wall-search patterns (right-hand or left-hand search), moving quickly through high-risk areas near bedrooms, exit hallways, and behind entry doors.
• Secondary Search: A meticulous, exhaustive search conducted after the fire has been completely controlled and smoke has cleared. The secondary search must be performed by a different crew than the primary search team to ensure fresh eyes and an unbiased re-evaluation of every room and void space.

Victim Carry & Emergency Drag Techniques

When a victim is located in a hazardous atmosphere, firefighters must choose an appropriate rescue removal technique based on victim mobility, weight, smoke density, and available personnel:

• Blanket Drag: Rolling an unconscious victim onto a blanket or coat and pulling the fabric along the floor. Excellent for single-firefighter rescue over smooth floors.
• Firefighter Drag: Binding the victim's wrists together, placing their arms around the firefighter's neck, and crawling on hands and knees while dragging the victim beneath the firefighter's body in heavy smoke.
• Webbing Strap Drag: Wrapping a commercial synthetic web strap around the victim's upper chest and shoulders to provide ergonomic leverage for rapid pulling.
• Cradle-in-Arms Carry: Lifting children or lightweight adults by placing one arm under their knees and the other around their back.

Personal Protective Equipment (PPE) Turnout Ensemble

Structural firefighting turnout gear is engineered to protect personnel from radiant heat, direct flame contact, steam, water, liquid chemicals, and mechanical injuries.

+-------------------------------------------------------------------------+
|                 TURNOUT COAT & TROUSERS THREE-LAYER SYSTEM              |
|                                                                         |
|  1. Outer Shell     --> Flame resistance & abrasion protection (Nomex)  |
|  2. Moisture Barrier--> Liquid, steam & chemical protection (Gore-Tex)  |
|  3. Thermal Liner   --> Insulates body against conductive heat transfer |
+-------------------------------------------------------------------------+

Turnout Gear Layers & Components

1. Outer Shell: Woven flame-resistant synthetic fibers (e.g., Nomex, Kevlar, PBI). Provides physical resistance against direct flame, tearing, and abrasion.
2. Moisture Barrier: Middle breathable membrane (e.g., Gore-Tex). Prevents liquid water, hot steam, bloodborne pathogens, and hazardous chemicals from penetrating inward to skin.
3. Thermal Liner: Inner quilted fabric layer. Traps insulating dead air space to protect firefighters against severe conductive and convective heat transfer.
4. Head & Foot Protection: Helmet with face shield/goggles, Nomex protective hood (shielding neck and ears), firefighting gloves, and steel-toe/steel-shank protective boots.

Safety Alert: Soot accumulation on turnout gear carries toxic carcinogens (e.g., polycyclic aromatic hydrocarbons). Gross decontamination at scene and regular gear washing are mandatory to reduce cancer risks.

---

Self-Contained Breathing Apparatus (SCBA) & Air Management

Structural fires produce toxic combustion gases—including Carbon Monoxide (CO), Hydrogen Cyanide (HCN), and phosgene. Modern firefighters rely on Open-Circuit Positive Pressure SCBA to breathe.

SCBA Operational Mechanics

• Open-Circuit Positive Pressure System: Compressed breathing air is delivered from an air cylinder through a two-stage regulator into the facepiece. The regulator maintains positive pressure inside the mask facepiece relative to the exterior atmosphere at all times. If the facepiece seal is slightly compromised, air leaks outward, preventing toxic external gases from entering.
• Core Components: High-pressure air cylinder (2,216 psi to 4,500 psi rating), harness and backpack assembly, first-stage pressure reducer, second-stage mask-mounted regulator, and full facepiece with speaking diaphragm.

Air Management & The Rule of Thirds

Although air cylinders carry NFPA duration ratings (e.g., 30-minute or 45-minute cylinders), actual air consumption depends on firefighter physical exertion and stress. Heavy work typically exhausts a "30-minute" cylinder in 15 to 20 minutes.

Firefighters must manage air consumption using the Rule of Thirds:

• First $1/3$ of Air: Allocated for entering the structure and advancing to the work area.
• Second $1/3$ of Air: Allocated for conducting search, rescue, and suppression operations.
• Final $1/3$ of Air: Reserved strictly as an emergency reserve for exiting the building before low-air alarms sound.

$\text{Total Air Volume} = \underbrace{\frac{1}{3} \text{ Entry flow}}_{\text{Advance}} + \underbrace{\frac{1}{3} \text{ Tactical work}}_{\text{Suppression}} + \underbrace{\frac{1}{3} \text{ Emergency reserve}}_{\text{Egress}}$

---

PASS Device, MAYDAY Protocols & Rapid Intervention Teams (RIT)

Personal Alert Safety System (PASS)

A PASS Device is an electronic safety monitor integrated into the SCBA. If a firefighter remains motionless for 18 to 20 seconds, the device sounds a low-volume pre-alarm. If immobility continues for 30 seconds, the PASS emits a continuous, high-decibel (95+ dB) audible distress alarm accompanied by flashing LED lights. PASS devices can also be manually activated.

MAYDAY Protocols & LUNAR Reports

When a firefighter becomes trapped, lost, disoriented, low on air, or injured, they immediately declare a radio MAYDAY. Command clears all radio traffic to receive the distress report using the LUNAR mnemonic:

• L - Location: Last known position inside the structure (e.g., second floor, division 2 east wall).
• U - Unit: Engine or ladder company designation (e.g., Engine 5).
• N - Name: Firefighter's name.
• A - Assignment / Air: Operational task being performed and remaining SCBA air pressure.
• R - Resources Needed: Specific equipment or assistance required (e.g., hose line, RIT bag, air cylinder, heavy extraction).

Rapid Intervention Team (RIT / RIC)

A Rapid Intervention Team (RIT) or Rapid Intervention Crew (RIC) is a dedicated, fully equipped crew positioned outside the hazard zone standing by exclusively to rescue lost or trapped firefighters. The RIT maintains specialized rescue gear—including a specialized RIT air bag (spare SCBA cylinder and universal air connection hose), search ropes, thermal imaging cameras, forcing tools, and wire cutters.