4.4 Firefighting Team Tactics, Hose Handling & Search Operations

Firefighting Team Tactics, Hose Handling & Search Operations

Quick Answer: Successful shipboard firefighting relies on disciplined team dynamics, controlled hose handling, and rapid, structured search and rescue. Interior accommodation fires are fought using 38 mm (1.5-inch) hoses for maneuverability, while machinery spaces and open decks require high-volume 65 mm (2.5-inch) hoses. Attack teams utilize variable dual-purpose nozzles (jet for reach/penetration; wide fog for thermal shielding and steam gas cooling). Crucially, entering a burning compartment requires checking door heat with the back of a gloved hand, remaining low on the hinge side, and applying short fog pulses (penciling) into the overhead smoke layer to cool pyrolysis gases and prevent catastrophic flashover. All operations must balance boundary cooling with bilge pumping to eliminate Free Surface Effect (FSE) stability hazards.

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1. Fire Main System, Hydrants & Marine Hoses

+-----------------------------------------------------------------------------------------+
|                           FIRE MAIN ARCHITECTURE & HOSE SIZES                           |
+---------------------+---------------------+---------------------+-----------------------+
|  EMERGENCY PUMP     |  ISOLATION VALVES   |  38 MM (1.5") HOSE  |  65 MM (2.5") HOSE    |
+---------------------+---------------------+---------------------+-----------------------+
| • Outside engine rm | • Sectional valves  | • Accommodation     | • Machinery spaces    |
| • Independent power | • Isolate damaged   | • Corridors/Cabins  | • Weather decks       |
| • Min 2 jets at req |   ruptured piping   | • High flexibility  | • High volume cooling |
|   working pressure  | • Ring main loop    | • Low weight        | • Heavy back-reaction |
+---------------------+---------------------+---------------------+-----------------------+

Fire Main Infrastructure & Isolation Valves

• Main Fire Pumps: Centrifugal pumps located in the engine room delivering seawater to the fire main distribution system.
• Emergency Fire Pump: Mandated by SOLAS Chapter II-2; located in a separate space outside Category A machinery spaces (e.g., steering gear flat or bow thruster room), powered by an independent diesel engine or emergency switchboard generator. It must supply at least two simultaneous jets of water through hydrants at minimum required pressure (typically 2.5 to 3.2 bar depending on vessel tonnage).
• Sectional Isolation Valves: Located along the fire main ring loop to isolate damaged or ruptured sections while maintaining continuous water pressure to the rest of the ship.

Marine Fire Hose Construction & Diameters

Shipboard hoses consist of an internal seamless synthetic rubber or EPDM lining bonded to an external high-tenacity woven polyester or aramid jacket that resists rot, mildew, marine ozone, and mechanical abrasion.

• 38 mm (1.5-inch) Hoses: Standard length 15 to 20 meters. Deployed inside accommodation quarters, hospital spaces, radio rooms, and mess rooms. Lightweight, easily maneuvered through narrow 90-degree corridor bends and tight watertight door coamings.
• 65 mm (2.5-inch) Hoses: Standard length 15 to 20 meters. Deployed across open weather decks, container bays, ro-ro decks, and main engine rooms. Delivers massive water volume (up to 500–700 L/min) for heavy boundary cooling and deep penetration, generating significant nozzle reaction force.

Dual-Purpose Variable Marine Nozzles

Marine hydrants are equipped with type-approved dual-purpose (jet/spray) variable pattern nozzles with a shutoff bale handle.

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2. Hose Team Organization & Mechanical Dynamics

A standard shipboard attack hose team consists of at least two firefighters on the nozzle line supported by an exterior door/hose tender.

                      [ HOSE TEAM DYNAMICS & ROLES ]

        [ NOZZLEMAN ]                     [ BACKUP MAN ]              [ HOSE TENDER ]
       (Team Leader)                    (Reaction Absorber)           (Friction Reducer)
           ______                             ______                       ______
          / o  o \                           / o  o \                     / o  o \
          \__--__/                           \__--__/                     \__--__/
         /|  ||  |\                         /|  ||  |\                   /|  ||  |\ 
        / | [NOZ]| \                       / | [HOS]| \                 / | [BGT]| \
          |  ||  |                           |  ||  |                     |  ||  |
          |  ||  |=== HOSE LINE =============|  ||  |=== HOSE LINE =======|  ||  |==>
         /        \                         /        \                   /        \
      [Directs Stream]                   [Braces Stance]               [Flakes Bights]
      [Scans Overhead]                   [Relieves Fatigue]            [Prevents Snags]

Crew Member Roles & Responsibilities:

1. Nozzleman (Attack Leader): Operates the nozzle bale and pattern ring; directs the stream onto the fire seat; monitors the overhead smoke layer and thermal neutral plane; controls the team's advance rate; communicates tactical conditions back to the bridge/on-scene commander.
2. Backup Man (Reaction Absorber): Positioned directly behind the nozzleman on the same side of the hose; places one arm securely around the nozzleman's waist or harness to maintain physical unity; braces legs in a low, wide athletic stance to absorb the strong backward hydraulic thrust (nozzle reaction force); feeds hose forward to prevent the nozzleman from fighting line tension.
3. Hose Tender / Feeder (Door Control): Stationed at door sills, companionway landings, and 90-degree corridor corners; flakes out excess hose in wide S-bights or loops; prevents the hose line from kinking, wedging beneath watertight coamings, or being pinched by closing fire doors.

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3. Tactical Entry & Compartment Firefighting

Opening a door to a fire compartment without tactical discipline can cause immediate flashover or backdraft.

[ STEP 1: FEEL DOOR FOR HEAT ] ---> Back of gloved hand; check top, middle, knob
               |
               v
[ STEP 2: POSITION ON HINGE SIDE ] -> Stay low; use steel bulkhead & door leaf as shield
               |
               v
[ STEP 3: CHARGE & BLEED HOSE ] ---> Flush air; test nozzle pattern to narrow fog
               |
               v
[ STEP 4: CRACK DOOR & PENCIL OVERHEAD ] -> Short 1-2s fog pulses into upper smoke layer
               |
               v
[ STEP 5: ADVANCE BENEATH NEUTRAL PLANE ] -> Single-knee shuffle; sweep floor ahead

The 5-Phase Tactical Entry Procedure:

1. Thermal Assessment: Feel the door, dogging handles, and bulkhead using the back of a gloved hand (the back of the hand is more sensitive to radiant heat, and reflex muscle contraction pulls the hand away from a hot surface rather than gripping it). Check from bottom to top; blistering paint or smoking seals indicate extreme internal heat.
2. Charge and Bleed Line: Charge the hose line with water before approaching the entrance. Open the nozzle in fog mode for 2 seconds to purge trapped air from the line and verify water pressure.
3. Hinge-Side Positioning: The attack team crouches low and to the hinge side of the door. This positions the heavy steel door leaf and structural bulkhead between the firefighters and any explosive fireball, backdraft blast, or thermal wave when the door is cracked.
4. Controlled Crack & Gas Cooling ("Penciling"): Open the door 5 to 10 cm. Direct short, 1- to 2-second pulsed bursts of high-pressure narrow-angle fog into the superheated overhead smoke layer. The fog droplets flash to steam, absorbing immense thermal energy and lowering the gas temperature below the autoignition point (~600°C), successfully preventing flashover.
5. Evaluate Thermal Response: If hot water droplets rain down without converting to steam, the upper layer has cooled. If steam hisses and no water falls, repeat gas cooling pulses before opening the door fully.

Advancing in the Compartment

• Stay Below the Thermal Neutral Plane: The thermal neutral plane is the sharp boundary layer dividing hot, buoyant toxic smoke overhead from cooler, breathable air along the deck. Firefighters must remain crouched below this layer.
• The Single-Knee Shuffle: Advance on one knee with the forward foot sliding along the deck, sweeping left and right to detect missing deckplates, burning debris, open hatches, or fallen casualties before committing body weight forward.

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4. Boundary Cooling & Free Surface Stability Management

+-----------------------------------------------------------------------------------------+
|                        BOUNDARY COOLING & FREE SURFACE HAZARDS                          |
+---------------------------------------------+-------------------------------------------+
|         BOUNDARY COOLING MECHANICS          |         FREE SURFACE STABILITY RISK       |
+---------------------------------------------+-------------------------------------------+
| • Cool all 6 surrounding boundaries         | • Water applied adds high top weight (KG) |
|   (Port, Starboard, Fore, Aft, Deck, Top)   | • Free water sloshes across deck beams    |
| • Use wide-angle fog spray (not solid jet)  | • Metacentric height (GM) drops rapidly   |
| • Strip combustible materials / insulation  | • Vessel develops severe list / capsize   |
| • Continuous boundary temperature checks    | • Mandatory: Run bilge/scupper pumps      |
+---------------------------------------------+-------------------------------------------+

Boundary Cooling Technique

• The Six Boundaries: Fire conducts heat rapidly through steel bulkheads. Teams must establish boundary cooling across all six enclosing surfaces: forward bulkhead, aft bulkhead, port bulkhead, starboard bulkhead, overhead deckhead, and deck below.
• Spray Application: Apply water in a wide-angle fog spray to moisten and cool bulkheads evenly. Never use solid straight jets on hot bulkheads; high-velocity jets strip structural thermal insulation and create excessive runoff without efficient heat absorption.
• Boundary Starvation: Remove all movable combustible materials (mattresses, wooden pallets, chemical drums, clothing) located in adjoining spaces away from hot bulkheads.

The Free Surface Effect (FSE) Stability Threat

• Every metric ton of water delivered into upper accommodation decks or cargo spaces represents 1,000 kg of high top-weight, elevating the ship's center of gravity ($KG$) and reducing metacentric height ($GM$).
• As water accumulates on wide deck surfaces, it sloshes toward the low side during vessel rolling. This dynamic liquid shift creates a powerful upsetting moment known as the Free Surface Effect (FSE), which can induce permanent list and catastrophic capsize.
• Tactical Countermeasure: Apply only the minimum volume of water necessary for cooling. The On-Scene Commander must ensure that deck scuppers are cleared of debris and that bilge/salvage pumps are actively pumping accumulated firefighting water overboard.

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5. Zero-Visibility Search and Rescue (SAR) & Overhaul

+-----------------------------------------------------------------------------------------+
|                       ZERO-VISIBILITY SYSTEMATIC SEARCH PATTERN                         |
+---------------------+---------------------+---------------------+-----------------------+
|  WALL REFERENCE     |  SWEEPING EXTENSION |  HIGH-RISK ZONES    |  CASUALTY DRAGS       |
+---------------------+---------------------+---------------------+-----------------------+
| • Left-Hand Search  | • Sweep arm/leg in  | • Under bunks/beds  | • Firefighter drag    |
|   or Right-Hand     |   wide arc on deck  | • Behind bathroom   | • 2-person extremity  |
| • Continuous touch  | • Second firefighter|   doors/closets     | • Webbing loop drag   |
| • Never switch walls|   sweeps room center| • Near exit sills   | • Keep low in smoke   |
+---------------------+---------------------+---------------------+-----------------------+

Systematic Wall Search Techniques

In dense, black smoke with zero visibility, search teams must adhere strictly to a systematic perimeter orientation:

1. Select Wall Reference: The team chooses either a Left-Hand Search (keeping the left gloved hand/tool continuously touching the perimeter wall) or a Right-Hand Search upon entering the space.
2. Perimeter Discipline: The lead firefighter follows the wall continuously, turning into every doorway, alcove, and corner along that perimeter.
3. Sweeping Pattern: The lead firefighter extends their outer foot and gloved arm in a wide 90-degree arc across the deck to locate obstacles, stairs, or casualties.
4. Team Connection: The second firefighter maintains physical contact with the lead firefighter's ankle, harness, or linking strap while sweeping the interior room space.
5. Exiting the Space: To exit, the team continues along the same wall until reaching the entry door, or turns 180 degrees and follows the opposite hand reference out. Never switch wall reference hands midway through a search.

High-Probability Casualty Locations

Panicked or incapacitated crew members rarely collapse in open hallways. Searchers must thoroughly check:

• Behind Doors: Casualties often collapse while trying to turn door handles.
• Under Bunks & Desks: Trapped individuals instinctively crawl beneath furniture to seek shelter from radiant heat.
• Inside Bathrooms & Shower Stalls: Crew members often seek water sources or become trapped in windowless modular heads.

Casualty Rescue Drags

• Firefighter Webbing Drag: Wrap a 2-meter webbing loop around the casualty's upper chest under the armpits; crawl on all fours while pulling the casualty along the deck beneath the hot smoke layer.
• Two-Person Extremity Carry: Rescuer 1 stands behind casualty, reaching under armpits to grasp wrists; Rescuer 2 grasps legs beneath knees; both lift and carry simultaneously.

Overhaul & Post-Fire Watch

• Overhaul Goal: Ensuring that every hidden pocket of fire, smoldering insulation, and ember is completely extinguished.
• Technique: Use a fire axe and pike pole to open ceiling panels, pull down pipe lagging, and inspect electrical cable trays.
• Thermal Imaging Camera (TIC): Scan all bulkheads, overheads, and corners to identify hidden thermal hotspots.
• Dedicated Fire Watch: A dedicated watchstander equipped with a charged fire hose and portable extinguisher must maintain continuous physical monitoring of the fire compartment for at least 1 to 2 hours (or as mandated by the Master) after extinguishment to eliminate any risk of re-ignition.