Module 5 • MCA Oral Preparation

SOLAS Chapter II-2
Study Recap

Support infographic for Module 5 Fire Fighting. This recap is built around SOLAS Chapter II-2: Fire protection, fire detection and fire extinction. For oral exams, keep bringing answers back to the same thread: prevent ignition, contain fire, detect early, protect life, preserve escape, and extinguish safely.

Core regulation

SOLAS II-2

Technical code

FSS Code

Revision sections

9 sections

Exam style

Applied oral answers

What this module should prove

You should be able to explain the purpose, structure and practical effect of SOLAS Chapter II-2, and then connect that to the systems and survey points you manage onboard: fire boundaries, fire detection, fixed extinguishing systems, means of escape, readiness, drills and maintenance.

Define the fire safety objectives and functional requirements of Chapter II-2.
Explain the structure of the chapter from Part A to Part G.
Differentiate the role of SOLAS II-2 from the FSS Code.
Define A, B and C class divisions in full, including construction, testing, temperature-rise limits, penetrations and fire door integrity.
Answer fixed-system questions on CO₂, water mist and emergency fire pump readiness.

Start Study Recap Jump to key regulations

Navigation

Purpose & objectivesWhat Chapter II-2 is trying to achieve Chapter structureParts A to G and how to explain them Key regulationsThe main regulations to quote in the oral Fire protectionA/B/C divisions, testing, MVZs, doors and penetrations Fixed systemsCO₂, water mist and emergency fire pump Portable mediaQuick extinguisher selection guide Operational readinessMaintenance, drills and impairment control Common oral trapsWhat candidates often say incorrectly Oral methodHow to structure a strong answer

Section 1

Purpose of SOLAS Chapter II-2

Main subject

Chapter II-2 covers fire protection, fire detection and fire extinction. It is the main SOLAS chapter for shipboard fire safety design and operational control.

Core objective

Prevent fire and explosion, reduce risk to life, reduce damage to the ship / cargo / environment, and contain, detect and extinguish fire in the space of origin.

Escape principle

A key purpose is to preserve adequate and safe escape routes so people can survive and evacuate a fire-affected area.

Fire safety objectives to remember

Prevent occurrence of fire and explosion
Reduce risk to life caused by fire
Reduce risk of fire-related damage
Contain, control and suppress fire effectively
Provide adequate escape arrangements

Best oral message

A controlled answer begins: “SOLAS Chapter II-2 is the main fire chapter. It sets the framework for preventing ignition, containing fire, detecting it early, preserving escape and extinguishing it safely.”

Oral prompt

“What is SOLAS Chapter II-2, and what are the main fire safety objectives behind it?”

Section 2

Chapter structure: Parts A to G

Examiners often want more than just “it’s the fire chapter.” A stronger answer shows that you understand the structure of the chapter and where different requirements sit.

Part AGeneral

Part BPrevention of fire and explosion

Part CSuppression of fire

Part DEscape

Part EOperational requirements

Remaining parts

Part F – Alternative design and arrangements
Part G – Special requirements

FSS Code link

SOLAS II-2 gives the regulatory requirement. The FSS Code provides the technical engineering specifications for many of the systems required by the chapter.

Do not confuse the chapter with the FSS Code. A safe oral phrase is: “SOLAS II-2 tells me what is required; the FSS Code tells me how many of those systems are engineered and specified.”

Oral prompt

“Talk me through the structure of SOLAS Chapter II-2 and explain how it connects to the FSS Code.”

Section 3

Key regulations to remember

Main regulations commonly quoted

Reg 2 – Fire safety objectives and functional requirements
Reg 4 – Probability of ignition
Reg 7 – Detection and alarm
Reg 9 – Containment of fire

Further key regulations

Reg 10 – Fire fighting
Reg 13 – Means of escape
Reg 14 – Operational readiness and maintenance
Reg 15 – Instructions, onboard training and drills

Reg 4

Think oil leaks, hot surfaces, insulation, fuel integrity and reducing the chance of ignition.

Reg 9

Think structural fire protection, fire zones, boundaries, penetrations and fire doors.

Reg 14/15

Think readiness, maintenance, drills, instruction and keeping systems effective between surveys.

Oral prompt

“Which regulations in Chapter II-2 would you be most likely to quote in an oral answer, and why?”

Section 4

Fire protection essentials: A, B and C class divisions

This is a high-value oral area. For A, B and C class divisions, avoid short answers such as “A is the strongest.” A stronger answer gives the construction, fire-test integrity, insulation temperature limits and practical inspection points.

A-class division

Formed by bulkheads and decks. Constructed of steel or equivalent material, suitably stiffened, and insulated as required. It must prevent the passage of smoke and flame to the end of the one-hour standard fire test.

B-class division

Formed by bulkheads, decks, ceilings or linings. Constructed of approved non-combustible materials. It must prevent passage of flame to the end of the first 30 minutes of the standard fire test.

C-class division

Constructed of approved non-combustible materials. It does not have the A/B class requirements for smoke/flame integrity or insulation temperature-rise performance.

Division	Construction	Fire-test integrity	Temperature-rise / insulation criteria
A-class	Steel or equivalent; suitably stiffened; formed by bulkheads and decks.	Prevents passage of smoke and flame to the end of the one-hour standard fire test.	Average unexposed side rise ≤ 140°C; any point including joints ≤ 180°C during the rated period: A-0, A-15, A-30 or A-60.
B-class	Approved non-combustible materials; formed by bulkheads, decks, ceilings or linings.	Prevents passage of flame to the end of the first half hour of the standard fire test.	Average unexposed side rise ≤ 140°C; any point ≤ 225°C during the rated period: B-0 or B-15.
C-class	Approved non-combustible materials.	No A/B smoke or flame integrity requirement.	No A/B insulation temperature-rise rating.

What does A-60 mean?

A-60 is not a door-closing time. It means an A-class division maintains its integrity in the standard fire test and its insulation keeps the unexposed side within the required temperature-rise limits for 60 minutes.

What does B-15 mean?

B-15 means a B-class division prevents flame passage for the standard B-class integrity requirement and maintains the B-class insulation temperature-rise limits for 15 minutes.

Main vertical fire zone

A main vertical zone is a section of the hull, superstructure or deckhouse divided by A-class divisions. Its purpose is to prevent or limit the horizontal spread of smoke and flames, supporting containment, escape and firefighting control.

Doors and penetrations

Doors in fire boundaries must preserve the fire integrity of the division.
Fire doors must self-close / latch correctly where required and must not be wedged open.
Cable and pipe penetrations must be properly approved and sealed.
Bad penetrations defeat the fire boundary even if the steel bulkhead is intact.

Common mistake: do not call every fire boundary A-60. State the correct class and rating only where it is required by the fire integrity tables and approved drawings.

Oral prompt

“Define an A-class bulkhead in full. Then define B-class and C-class divisions, explain the temperature-rise criteria, and tell me why main vertical fire zones are used.”

Section 5

Fixed system focus: CO₂, water mist and emergency fire pump

CO₂ total flooding

Evacuate and account for all personnel
Stop fans and close dampers
Shut fuel and machinery as appropriate
Seal the space
Release only under proper authority

Key CO₂ facts

Main extinguishing principle: oxygen displacement / smothering
Machinery-space discharge performance: 85% within 2 minutes
Re-entry must be controlled with BA and atmosphere checks

Water mist / Hi-Fog

Fine droplets provide rapid cooling and suppression. Good oral answers explain the principle rather than claiming it solves every scenario automatically.

Emergency fire pump

Located outside the main machinery-space fire risk so firefighting water can still be supplied if the engine room fire disables the main pumps.

Capacity point

A common teaching point is that the emergency fire pump is at least 40% of the total required fire pump capacity, subject to the vessel’s approved arrangement.

Oral prompt

“What is your safe sequence before releasing CO₂, and why is the emergency fire pump arranged outside the main machinery-space fire risk?”

Section 6

Portable extinguisher quick guide

First-choice associations

Water – Class A combustibles
CO₂ – live electrical equipment
Wet chemical – cooking oil / Class F
Dry powder – rapid knock-down and chain reaction interruption

Good oral caution

Always mention the nature of the fire, the safety of the operator, and any limitation of the medium. Example: CO₂ leaves no residue but gives very little cooling, so re-ignition is possible.

Electrical cabinet

First choice is usually CO₂ because it is non-conductive and clean.

Galley fryer

Use wet chemical for cooking oil fires because it cools and saponifies the surface.

Ordinary combustibles

Use water for Class A materials such as wood, cloth and paper where appropriate.

Oral prompt

“Which extinguisher would you choose for a switchboard fire, a Class A material fire and a galley cooking-oil fire?”

Section 7

Operational readiness, maintenance and drills

SOLAS fire compliance is not only about equipment being installed. Regulation 14 and Regulation 15 push candidates to talk about operational readiness, maintenance, instructions and drills.

1Keep systems maintained and in ready condition.

2Train the crew and drill them properly.

3Record tests, defects, impairments and restoration.

4Escalate if a system is unavailable or impaired.

Typical readiness points

Fire doors free and working
Vent closures and remote stops operable
Fire pumps, hydrants and hoses ready
CO₂ room / release arrangements secure and healthy
Detection system indicators normal

Impairment thinking

If a system is isolated or impaired, you should discuss risk control, logging, temporary precautions, crew brief and restoration plan. Dry dock CO₂ isolation is a good example of this thinking.

Oral prompt

“How would you show compliance with operational readiness and maintenance requirements for fire safety systems?”

Section 8

Common oral traps and weak answers

Common mistakes

Confusing SOLAS II-2 with the FSS Code
Calling every fire boundary A-60
Releasing CO₂ before personnel are accounted for
Reopening a space too early after CO₂ discharge
Giving equipment lists without explaining the safety reason

How to improve

Start with the regulation or code hook
Describe the arrangement onboard
State why it matters for safety
Finish with testing / readiness / defect action

A poor answer lists appliances. A stronger answer says what the regulation expects, what arrangement the ship has, why it protects people and the ship, and how you keep it ready.

Oral prompt

“What are the most common mistakes candidates make when answering SOLAS Chapter II-2 questions?”

Section 9

Oral answer method for SOLAS Chapter II-2

1Name the regulation, part or code.

2Describe the arrangement or system onboard.

3Explain the safety reason and practical use.

4Finish with testing, maintenance and defect action.

Best oral structure

Regulation → arrangement → safety reason → test / maintenance → defect action. This structure works well for fire doors, CO₂ systems, detection systems, fire pumps and most other Module 5 questions.

Final reminders

Always speak safely when discussing CO₂
Always separate SOLAS from FSS Code detail
Always link hardware to drills, maintenance and readiness
Always keep the answer vessel-practical

Final self-test

“Give me a complete answer on SOLAS Chapter II-2: the purpose of the chapter, how it is structured, the key fire regulations, how fire boundaries and fixed systems work, and how you prove the ship remains ready between surveys.”