what is a requirement for fire extinguishers on a boat？-A comprehensive guide to ship fire protection.

In maritime environments, most captains focus primarily on hydrometeorology and navigation safety, often underestimating the risk of fire. In reality, fire is one of the most deadly threats a vessel can face.

1. Characteristics and Challenges of Shipboard Fires

Unlike fires on land, shipboard environments are enclosed and cramped, carrying large amounts of fuel, electrical equipment, and other combustibles. Once a fire breaks out, flames can spread quickly along pipelines and bulkheads. The accumulation of toxic smoke, limited escape routes, and restricted evacuation options make shipboard fires far more dangerous than those on land.

According to the International Maritime Organization (IMO), Class B (flammable liquid) and Class E (electrical) fires—often caused by electrical short circuits and fuel leaks—account for over 60% of shipboard fires.

Additionally, ships are prone to mixed fire scenarios: electrical fires from onboard equipment combined with traditional combustible materials such as fuel, textiles, and plastics. The situation becomes more severe when hydrological and meteorological conditions cause the vessel to pitch and roll, further complicating firefighting operations. Compounding the problem, ships are often far from professional rescue forces. Statistics show that in open sea conditions, it takes an average of over six hours for professional firefighting teams to arrive—challenges rarely encountered on land.

2. Fire Extinguisher Requirements on Ships

Due to the unique risks of shipboard fires, the IMO and various national classification societies enforce fire safety regulations far stricter than land-based standards. For example, Chapter II-2 of the IMO SOLAS Convention for merchant ships requires:

Accommodation, service areas, and engine rooms must be equipped with portable fire extinguishers.

At least one extinguisher must be placed near the steering gear control station.

Engine rooms above a certain size must have CO₂ or clean agent fire suppression systems installed.

United States (USCG standards)

According to 33 CFR Part 175 (2022 revision):

Vessels under 26 feet (about 7.9 m) with enclosed fuel systems, engine compartments, or living spaces must carry at least one B-I type extinguisher.

Vessels 26 to<40 feet:="" at="" least="" two="" b-i="" or="" one="" b-ii="" type="" extinguishers.="">

Vessels 40 to<65 feet:="" at="" least="" three="" b-i="" or="" one="" b-ii="" plus="" type="" extinguisher.="">

China

The Technical Rules for Statutory Inspection of Inland Waterway Vessels (2019) stipulate that push/tow boats with a main engine power exceeding 370 kW must carry an additional four portable foam extinguishers beyond the basic configuration. Kitchens with LPG stoves must have at least two portable extinguishers, including at least one dry powder unit.

3. Layout and Compliance of Fire Extinguisher Placement

Proper extinguisher placement on ships is a systematic process involving type selection, quantity, spatial arrangement, and maintenance. In short: “Right type, enough quantity, easy access.”

3.1 Type selection and suitable areas

4–12 kg ABC dry powder extinguishers: accommodation areas, kitchens, decks.

5–9 kg CO₂ or clean agent extinguishers: wheelhouse, electrical rooms, distribution panels—high-risk electrical zones.

9–20 L foam extinguishers: engine rooms, fuel handling areas.

3.2 Spatial layout and quantity

The “10-meter coverage rule” applies—no location on the vessel should be more than a 10-meter walk from an extinguisher. Each station should have at least two extinguishers, preferably located at entrances or just outside them. High-risk areas should have additional extinguishers with larger capacities.

3.3 Maintenance

Extinguishers should be inspected regularly to ensure readiness. Check monthly for pressure status, appearance (especially for corrosion in hot, salty marine climates), and replace as needed.

4. How to Respond to a Fire Onboard

As noted earlier, external firefighting assistance at sea can take hours to arrive, meaning the crew must rely entirely on themselves and onboard equipment. Steps to take during a shipboard fire:

Raise the alarm and notify all crew: Use the vessel’s PA or alarm system. The captain and watchkeepers must immediately locate the fire, assess its size, and determine its type.

Cut off fuel and power sources: Shut down electrical power in the affected area to avoid short circuits and secondary fires. In engine room fires, close fuel valves promptly to prevent leaks that could cause explosions.

Choose the right extinguisher:

ABC dry powder: suitable for most areas.

Foam extinguishers: for fuel fires in engine rooms (do not use directly on electrical equipment).

CO₂ extinguishers: for dashboards, electrical equipment, and control rooms.

Monitor effectiveness: Once flames are under control, extinguish remaining embers to prevent reignition, and cool surrounding areas.

Call for help and prepare to abandon ship: Use VHF Channel 16 to contact nearby vessels and the coast guard. If the fire is uncontrollable, don life jackets, deploy life rafts, and take emergency supplies before abandoning ship.

5. Practical Guidelines for Firefighting at Sea

1. The PASS method

Pull: Shake the dry powder extinguisher to loosen the powder, then pull the safety pin.

Aim: Stand upwind and aim the nozzle at the base of the flames, not the top (avoid splashing fuel).

Squeeze: Press the handle fully and continuously (not in short bursts), directing the first spray away from escape routes.

Sweep: Sweep side to side to cover the fire area.

2. Special scenarios

Engine room oil fires: Use a smothering technique—spray over the oil surface to form a powder layer, rather than directly hitting the flames.

Electrical cabinet fires: Keep a 1-meter distance, spray at a 45° angle to avoid arcing.

Kitchen oil pan fires: Turn off the range hood, then spray from a low angle at the side of the pan to prevent splattering.

3. Crew coordination tactics

For early-stage fires that are spreading, use the “3+1” strategy:

First response team (2 people): Lead firefighter operates an ABC extinguisher, assistant provides lighting and clears obstacles.

Second backup (1 person): Prepares spare extinguishers and monitors fire spread.

Commander (1 person): Controls ventilation (shuts down fans) and organizes evacuation.

The complex structure of ships, combined with the fact that heat and smoke can spread three to five times faster than in buildings on land, poses severe dangers to crew. Steel’s high thermal conductivity accelerates fire spread through bulkheads, creating an “oven effect.” Mixed fire scenarios make the threat even more serious.

Shipboard fire safety therefore requires faster, more comprehensive measures—not just more equipment, but an integrated system involving devices, crew training, and maintenance. Every captain must adopt a systematic mindset, linking extinguishers, fixed firefighting systems, and fire detection into a coordinated network. Enhancing crew awareness and emergency skills is far more effective than simply increasing equipment quantities.