Portable Extinguishers and Personal Protective Equipment

Why Portable Extinguishers and PPE Matter

Fire is the most dangerous hazard aboard any vessel. The confined spaces, limited escape routes, and flammable cargoes of a ship mean a small fire can become catastrophic within minutes. STCW Basic Training requires every seafarer to demonstrate competence in fire prevention, detection, and suppression — including the correct use of portable extinguishers and personal protective equipment (PPE). This lesson builds the hands-on skills you will be assessed on before you ever step aboard a working vessel.

Fire Classes and Extinguisher Selection

Matching the extinguisher to the fire class is not optional — using the wrong agent can spread the fire or create a new hazard.

• Class A — ordinary combustibles: wood, paper, cloth, rope. Use water or dry chemical ABC.
• Class B — flammable liquids and gases: fuel oil, diesel, gasoline, LPG. Use CO₂, dry chemical BC or ABC, or foam (AFFF).
• Class C — energized electrical equipment. Use CO₂ or dry chemical BC/ABC (non-conductive agents only). Never use water or foam.
• Class D — combustible metals (rare aboard most vessels). Requires a specialized dry-powder agent.
• Class K — cooking oils and fats (galley fires). Use wet chemical agent.

Every extinguisher label lists the fire class it is rated for. Always read the label before selecting an agent.

Portable Extinguisher Inspection (NFPA 10)

NFPA 10 is the standard governing portable fire extinguishers. Monthly visual inspections are required. During a proper inspection you verify:

1. Location and accessibility — extinguisher is in its designated bracket, unobstructed.

2. Pressure gauge — needle is in the green (operable) zone.

3. Pin and tamper seal — pull pin is present; the plastic or wire tamper seal is intact and unbroken.

4. Hydrostatic test date — a tag on the cylinder shows when the last hydrostatic pressure test was performed. NFPA 10 specifies test intervals by extinguisher type; if overdue, the unit must be removed from service.

5. Physical condition — no corrosion, dents, or damaged hose.

6. Weight / fullness — for CO₂, heft the cylinder; a noticeably light unit may be discharged.

Record your findings on the maintenance tag immediately. An incomplete or falsified tag is a safety violation.

The P-A-S-S Technique

When a fire is small and you have a clear escape route behind you, use P-A-S-S:

• P — Pull the pin. This breaks the tamper seal and unlocks the handle.
• A — Aim the nozzle or horn at the base of the flames, not the top.
• S — Squeeze the handle firmly and steadily to discharge the agent.
• S — Sweep side to side across the base of the fire until it is out or the extinguisher is empty.

Maintain the manufacturer's recommended standoff distance — typically 6–10 feet for most portable units, though CO₂ horns require you to stay farther back to avoid frostbite and asphyxiation risk. If the fire does not go out quickly or grows, stop, get out, close the door, activate the alarm, and let the fixed system or fire team handle it. Never turn your back on a fire.

SCBA and Structural Firefighting PPE

Self-Contained Breathing Apparatus (SCBA) protects you from smoke, toxic combustion gases, and oxygen-deficient atmospheres. No firefighting operation in a confined or smoke-filled space should begin without it.

A full structural firefighting ensemble for this lab includes:

• Station wear or equivalent protective clothing
• Structural firefighting gloves
• Helmet
• SCBA with face piece and PASS (Personal Alert Safety System) device

Donning sequence (follow the manufacturer's card for your specific unit):

1. Don station wear and gloves.

2. Place the helmet aside temporarily for face piece fit check.

3. Position the SCBA harness on your back, buckle the waist belt, then the shoulder straps — snug but not cutting off circulation.

4. Open the cylinder valve fully, then back a half-turn.

5. Don the face piece — start with the chin, pull the straps rearward and upward, tighten from the bottom straps first.

6. Perform a positive-pressure seal check: cover the exhalation valve briefly; the face piece should slightly pressurize and you should feel no air leaking at the seal.

7. Breathe normally from the unit for two minutes before entering any hazard area.

8. Activate the PASS device.

The STCW competency standard requires you to complete donning and confirm a positive seal in 3 minutes or less. Practice until donning is automatic — in an actual fire you will be stressed, hot, and possibly disoriented.

Key Safety Rules for This Lab

• Never discharge an extinguisher indoors at the inspection stations — this is an inspection-only rotation.
• At the live-fire prop, wear at minimum your PPE gloves and eye protection; follow all range officer commands immediately.
• CO₂ extinguishers produce extreme cold at the horn — never touch the horn during or after discharge.
• Dry chemical leaves residue that can cause respiratory irritation — work upwind and wash hands after handling.
• If your SCBA low-air alarm sounds during the SCBA rotation, notify the instructor immediately and exit per the instructor's direction.