M500-2.2.1

Dealing with fire aboard - prevention in port and at sea

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Where candidates fall short

Most candidates can list firefighting equipment but stumble when asked about prevention — the measures that stop a fire starting or spreading. Examiners report that answers become vague once the conversation moves beyond extinguisher types. At command standard you must demonstrate a systematic, risk-based approach: you own the fire safety culture aboard.

Flash point — your non-negotiable foundation

Fuel oil for main and auxiliary machinery must have a flash point of not less than 60 °C (SOLAS II-2 Reg 4). Emergency generator fuel may be not less than 43 °C. Knowing these figures is expected; not knowing them in an oral is an immediate red flag.

Prevention in port

Fuel operations

  • Hot work prohibition during bunkering; appropriate notices posted, ignition sources eliminated.
  • Bunker delivery note and MARPOL sample retained; spill contingency in place before hoses connect.
  • Bonding/earth where required by the berth operator.

Hot work

  • Permit to work issued by the master or authorised officer; responsible — the decision sits with you.
  • Area cleared of flammable material; fire main pressurised; fire extinguisher and fire watch in place.
  • After work ceases: continuous fire watch for not less than 30 minutes, plus a further check 2 hours later.
  • Never delegate the decision to issue a hot-work permit without your explicit authority.

General port risks

  • Shore power connections inspected; correct rating confirmed; no overloading.
  • Galley exhaust filters cleaned regularly; unattended cooking prohibited.
  • Smoking policy enforced; designated areas only, never in accommodation.
  • Access control: minimise uncontrolled visitors; theft and sabotage are ignition risks.

Prevention at sea

Machinery spaces

  • Fixed fire detection system tested before departure; detectors not blanked off.
  • Engine room inspections on watch: oil mist, fuel leaks onto hot surfaces, and lagging condition are the classic ignition triangle.
  • Fuel and hydraulic lines remote from exhaust manifolds; lagging intact and oil-free.
  • Bilges kept clean and dry; flammable residue in bilges is an accelerant.

Accommodation and galley

  • Deep-fat fryers never left unattended; automatic cut-outs checked.
  • Galley watch-off brief: confirm all appliances isolated before the cook leaves.
  • No combustibles stowed against or near electrical panels.

Electrical

  • Shore-to-ship transition checked: correct breaker sizing, no nuisance trips bypassed.
  • Cable runs inspected for chafe, especially in way of fairleads and structural penetrations.
  • Any evidence of arc damage or burning smell is a stand-down-and-investigate situation — you do not accept 'probably fine'.

Watchkeeping culture

  • Smell, smoke, and heat are your early-warning system. Train crew to report without hesitation.
  • Fire patrols are a requirement under the yacht codes; ensure they are logged and genuine, not a walk-past.
  • You set the culture. Corners cut on prevention become fires at sea.

Practice questions

recallcore

What is the minimum flash point for fuel oil used in a yacht's main propulsion or auxiliary machinery under SOLAS?

recallcore

After hot work is completed, what are the mandatory fire watch requirements?

scenariocore

You are at anchor. The chief engineer requests permission to carry out welding on an exhaust bracket in the engine room. Walk me through how you, as master, manage that.

oralstretch

As master, how do you satisfy yourself that fire prevention is being actively maintained on passage, not just at departure?

scenariostretch

During bunkering in port a crew member proposes using an angle grinder nearby to finish a repair job quickly before the fuel trucks arrive. What is your decision and why?

Independent preparatory study aligned to the MCA Master (Yachts less than 500 GT) oral examination syllabus. Not an MCA-approved course and confers no credit toward a Certificate of Competency.