Question 1

The master has given the order to abandon ship. You are OOW at the bridge. Describe the sequence of actions from order to final departure from the vessel.

Accepted Answer

Sound the abandon ship signal (7 short + 1 long blast on whistle and alarm); ensure GMDSS distress alert transmitted (DSC on Ch 70 and/or MAYDAY on Ch 16); activate EPIRB manually if not auto-activated; ensure VDR (Voyage Data Recorder) is operating to preserve data; collect GMDSS portable radio; muster crew and passengers at lifeboat/liferaft stations per muster list; ensure all persons accounted for; launch survival craft in sequence; assist embarkation; ensure CO2/fire suppression is not activated if the engine room has personnel still inside; the master is last to leave. If imminent sinking: deploy liferafts for immediate entry, float-free EPIRB will activate automatically. The abandon ship sequence is one of the most examined emergency procedures at all levels. Key SOLAS points: the abandon ship signal is 7 short blasts plus 1 long blast on the ship's whistle and internal alarm (SOLAS III/6). The VDR preserves navigational data that will assist the subsequent MAIB investigation — it should not be stopped or its data overwritten. The EPIRB: Category I EPIRBs float free and auto-activate when submerged — but manual activation as the vessel is abandoned ensures the signal is transmitting from the earliest point. The master is last to leave — this is both tradition and law in many jurisdictions. The OOW's role at the bridge (transmitting distress, activating EPIRB, accounting for crew) must be completed before leaving. In a rapid-sinking scenario (e.g. flooding below waterline), priorities shift: transmission first, then muster, then launch — there may be no time for sequential steps. The VDR "crash-protected" capsule automatically separates and floats free in many installations.

Question 2

Your examiner asks: "Describe the fire triangle and the four internationally recognised classes of fire relevant to shipboard operations. Which extinguishing media are correct for each?"

Accepted Answer

The fire triangle requires three elements simultaneously: heat (ignition source), fuel (combustible material), and oxygen. Remove any one element and the fire goes out. Classes: Class A — solids (wood, rope, bedding) — water, foam, dry powder; Class B — flammable liquids (fuel oil, paint, solvents) — foam, CO2, dry powder; Class C — flammable gases (LPG, acetylene) — dry powder, shut off supply first; Class D — combustible metals (magnesium, titanium, sodium) — specialist dry powder only; Class F (electrical equipment) — CO2, dry powder — NEVER water. Note: electrical fires are sometimes classed separately rather than as a fire class. The fire triangle (heat, fuel, oxygen) underpins all firefighting strategy: cooling removes heat (water); smothering removes oxygen (CO2, foam blanket); starvation removes fuel (shut off supply, remove combustible material). Note the tetrahedron model adds a fourth element — the chain reaction — which halite extinguishing agents (Halon, now banned under MARPOL Annex VI except for existing systems) interrupt. Electrical fires (Class F in some classifications) must never be fought with water or foam — both conduct electricity. CO2 is the correct agent for switchboard and electrical equipment fires. Class D fires (metals) react violently with water — specialist dry powder (not standard ABC powder) is the only safe option. At OOW level, the examiner expects correct extinguishing media for each class and awareness that using the wrong agent can be dangerous.

Question 3

Your examiner asks: "What types of fire detectors are fitted on cargo ships under SOLAS Chapter II-2, and what are the conditions under which each type is most effective?"

Accepted Answer

Smoke detectors (ionisation or photoelectric): detect combustion particles — most effective for smouldering fires producing visible or invisible smoke before open flame. Heat detectors: either fixed-temperature (alarm at a set temperature, e.g. 57-96 degrees) or rate-of-rise (alarm when temperature rises faster than normal, e.g. 5 degrees per minute) — effective for fast-burning fires. Flame detectors: detect infrared or ultraviolet radiation from open flames — effective in machinery spaces with high background heat. Gas/carbon monoxide detectors: detect CO as an early indicator of smouldering fires. SOLAS II-2/7 requires automatic fire detection and alarm systems in crew accommodation, service spaces, control stations, and cargo spaces as appropriate. SOLAS II-2 Chapter 7 and the FSS Code Chapter 9 govern fire detection requirements. Key point for OOW orals: smoke detectors are the most sensitive for early detection of smouldering fires (which produce CO and aerosols before visible flames) — they are required in accommodation spaces. Heat detectors are more appropriate in galleys and machinery spaces where ambient temperatures and aerosols (cooking fumes, diesel exhaust) would cause false alarms from smoke detectors. Rate-of-rise detectors are faster-responding than fixed-temperature but can false-alarm in areas with rapid legitimate temperature changes (boiler rooms, hot work areas). Flame detectors are specifically required in unmanned machinery spaces. CO detectors as an early warning layer are increasingly specified in cargo hold monitoring systems. The FSS Code divides spaces into three categories: A (accommodation), B (service/machinery), and C (cargo) — each has specific detection requirements.