MAJ EOOW Engineer Exam cheat sheet

Two-stroke diesel scavenge air must be pressurized above cylinder pressure (typically 0.1–0.3 bar gauge at part load, higher with turbocharger boost) or exhaust gas will blow back into the air receiver.

Indicator diagrams: compression pressure, maximum firing pressure (Pmax), and expansion line reveal injection timing and scavenge efficiency; Pmax falling with steady fuel index points to leaking exhaust valve or worn piston rings.

Critical speed is the shaft speed where a lateral or torsional natural frequency coincides with running speed; the engine must pass through it quickly and never be held there continuously.

Turbocharger surging (repeated whooshing, boost pressure oscillation) is caused by compressor fouling, air cooler blockage, or rapid load change; clean the compressor and check the air cooler differential.

Propeller law: power absorbed varies approximately with shaft speed cubed (P ∝ N³) and torque with speed squared, so a small rpm increase demands a large power increase.

Fuel valve penetration and atomizer condition affect ignition delay; a sticking needle causes high exhaust temperature on that unit and possible afterburning in the exhaust manifold.

Starting air interlocks must prevent fuel admission until the engine turns on air; turning gear must be disengaged before starting air is admitted.

Cylinder lubricator feed rate is set by load; over-lubrication fouls ports and rings, under-lubrication causes scuffing and high wear on the liner.

The watchkeeper must remain in the machinery space or immediately available and must not leave the engine room unmanned unless the unattended machinery space (UMS) mode is properly set and alarms transferred.

A formal handover includes machinery status, ongoing defects, tank levels, fuel/water transfers in progress, and any permits or isolations in force.

Bridge orders (dead slow, slow, half, full) must be acknowledged and executed; engine movements are logged with time and direction in the bell book.

Any alarm must be acknowledged and investigated, not merely silenced; repeated alarms must be recorded and reported to the Chief Engineer.

Before taking over the watch, check sump levels, cooling water levels, fuel and lube oil pressures, exhaust temperatures, and running hours of critical pumps.

Unusual noise, vibration, smell, or smoke is a valid reason to stop and investigate even without an alarm; report findings to the duty engineer.

Watchkeepers must not be under the influence of alcohol or drugs; minimum rest hours per STCW must be maintained and recorded.

Oil Record Book Part I covers machinery space operations (bunkering, transfers, disposal, leakage); Part II covers cargo/ballast operations for oil tankers.

Entries in the Oil Record Book must be made without delay, signed by the officer in charge, and each completed page signed by the Master.

Bunkering procedure: pre-bunker meeting, agreed transfer rate, tank soundings before/after, continuous monitoring, drip trays under manifold, and stop signal agreed with the barge.

The engine room log records pressures, temperatures, fuel consumed, running hours, and any incidents; entries must be factual and contemporaneous.

Permit-to-work systems are required for hot work, enclosed space entry, and work on electrical or pressurized systems; isolation and lock-off must be verified.

Planned maintenance records and defect reports support class surveys and demonstrate compliance; falsification is a criminal offence under MARPOL and flag law.

MARPOL Annex I requires retention of Oil Record Book entries for at least three years on board.

Planned maintenance is scheduled by running hours or calendar interval, whichever comes first; condition monitoring (vibration, oil analysis, thermography) can extend intervals only with justification.

Oil analysis reports wear metals (Fe, Cu, Cr, Pb, Sn) and contaminants; rising iron with steady viscosity suggests ring/liner wear, rising water suggests cooler leakage.

Before opening any machinery, isolate, depressurize, drain, and tag out; verify zero energy state before removing covers or pipework.

Crankshaft deflection readings detect bedplate distortion and bearing wear; readings outside the engine builder's limits require investigation before further running.

Valve grinding, pump overhaul, and heat exchanger cleaning must follow maker's clearances and torque values; record measurements for trending.

Spare parts must be stored to prevent corrosion; rubber goods and gaskets have shelf lives and must be rotated.

Repairs affecting class-relevant machinery require surveyor attendance or notification before return to service.

Centrifugal pumps must be primed before start; running dry causes seal and wear-ring damage; discharge valve is started closed and opened slowly.

Positive displacement pumps (gear, screw, piston) must never be run against a closed discharge without a relief valve; they are self-priming but damage rapidly if dry.

Boiler safety valves lift at set pressure; low-water level trips the burner; water level must be checked and blown down daily; scale reduces efficiency and can cause overheating.

Steering gear must be tested before departure and every watch at sea; SOLAS requires two independent power units and the ability to change over within 45 seconds.

Air compressors: intercooler and aftercooler drains must be blown regularly; high discharge temperature usually indicates valve or cooler fouling.

Deck machinery (windlass, winches, cranes) must have brakes tested and load limits marked; hydraulic systems require filter and oil condition checks.

Fuel oil purifiers remove water and solids; incorrect gravity disc or throughput causes carry-over into the engine and rapid injector damage.

Insulation resistance is measured with a megohmmeter; minimum acceptable values are typically 1 MΩ for machinery and higher for control circuits per class rules.

Electrical shock risk: current through the body above about 30 mA can be fatal; earth leakage and residual current devices protect against this.

Before working on electrical equipment, isolate, lock off, prove dead with a tester, and discharge capacitors; never assume a circuit is dead.

Generator paralleling requires matching voltage, frequency, and phase; kW load sharing is set by governor droop and reactive load by excitation.

Automatic voltage regulator maintains generator terminal voltage; loss of excitation causes voltage collapse and reactive power import.

Programmable control systems and alarms should be tested periodically; a faulty sensor can cause a spurious trip or mask a real fault.

Battery rooms require ventilation and no naked lights; hydrogen from charging is explosive above about 4% concentration.

The engine room is bounded by collision bulkhead forward, aft peak bulkhead aft, and tank top; watertight subdivision limits flooding to one compartment.

Double bottom tanks under the engine room hold fuel, lube oil, and ballast; sounding pipes and air pipes must be clear and marked.

Structural members: longitudinal girders, floors, and brackets transmit loads; cracks or wastage at bracket toes are stress concentrations requiring reporting.

Sea water inlet chests and valves must be accessible and fitted with strainers; blockage causes loss of cooling and possible engine shutdown.

The stern tube and shafting pass through the aft peak; stern gland leakage and bearing temperature must be monitored.

Corrosion protection: sacrificial anodes in ballast tanks and sea water systems; coating breakdown accelerates wastage and must be reported at surveys.

Watertight doors in machinery spaces must be operable from both sides and tested; they must not be wedged open at sea.

Free surface effect from partially filled tanks reduces metacentric height (GM) and can cause loss of stability; tanks should be pressed up or emptied.

Flooding of a machinery space adds a large free surface and weight; bilge pumps, emergency pumps, and watertight closures are the primary response.

Damage control: sound bilges, identify source, isolate the compartment, close watertight doors, and start emergency bilge suction.

Emergency generator and emergency fire pump are located outside the main machinery space and must be tested regularly.

List or trim changes during ballast or fuel transfer must be calculated; large transfers should be planned and monitored from the bridge.

Loss of GM can lead to rapid angle of loll; corrective action is to reduce free surface and lower weights, not to add top weight.

STCW sets minimum rest: at least 10 hours in any 24-hour period and 77 hours in any 7-day period, with exceptions only under strict conditions.

The Engineer Officer of the Watch certificate requires approved sea service, completed training, and passing the flag state examination.

SOLAS Chapter II-1 covers machinery and electrical installations; Chapter II-2 covers fire protection; both apply to machinery spaces.

MARPOL Annex I covers oil pollution; Annex IV sewage; Annex V garbage; Annex VI air pollution including sulphur limits.

Flag state implements conventions; port state control may detain a ship for deficiencies in machinery, pollution prevention, or crew certification.

The Master has overriding authority and responsibility for safety and pollution prevention; the Chief Engineer is responsible for machinery and its records.

A certificate of competency must be revalidated every five years with evidence of sea service or approved training.

MARPOL Annex I prohibits any discharge of oil or oily mixtures within special areas and limits outside them to 15 ppm for machinery space bilge water through approved equipment.

Oil-water separator must be operated with the 15 ppm alarm and automatic stopping device functional; bypassing is a criminal offence.

Fire in the engine room: raise alarm, stop fuel, shut down ventilation, release fixed CO2 only after confirming all personnel evacuated and boundary closed.

Enclosed space entry requires atmosphere testing for oxygen (19.5–23.5%), hydrocarbons, and toxic gases, plus a standby person and permit.

Emergency generator, emergency fire pump, and emergency lighting must be tested weekly and recorded.

Spill response: stop the source, contain with booms or absorbents, notify the bridge and Master, and record in the Oil Record Book.

Drills required by SOLAS include fire, abandon ship, and oil spill response; musters and debriefs are recorded.

Fatigue degrades vigilance and decision-making; STCW rest hours and proper watch rotation are the primary controls.

Effective handover uses a structured briefing: machinery state, defects, ongoing work, permits, and expected events.

A just culture distinguishes human error from reckless or intentional violation; near-miss reporting should be encouraged without blame.

Toolbox talks before complex jobs identify hazards, required permits, isolation points, and emergency arrangements.

Clear, closed-loop communication (order repeated back) reduces misunderstanding during manoeuvring and emergency response.

Authority gradient that is too steep suppresses junior engineers from reporting concerns; too flat causes indecision in emergencies.

Cross-cultural crews require plain technical English and confirmation of understanding, especially for alarms and orders.

Scavenge air pressure below cylinder pressure causes exhaust blow-back into the air receiver; check turbocharger and air cooler.

Pmax dropping with constant fuel index indicates leaking exhaust valve, worn rings, or late injection.

Never hold the engine at a barred or critical speed; pass through quickly.

Turbocharger surge is caused by compressor fouling, air cooler blockage, or sudden load change.

Propeller law: power ∝ N³, torque ∝ N².

Sticking fuel valve needle raises exhaust temperature on that unit and can cause afterburning.

Turning gear must be disengaged before starting air is admitted.

Cylinder oil feed is set by load; too little causes liner scuffing.

UMS mode may only be set when all alarms and automation are proven functional and the bridge is informed.

Handover covers machinery status, defects, tank levels, transfers in progress, and permits.

Bridge engine orders must be acknowledged and logged in the bell book with time and direction.

Alarms must be investigated, not just silenced; repeated alarms are reported to the Chief Engineer.

Pre-watch checks: sump levels, cooling water, fuel and lube pressures, exhaust temperatures, running hours.

Unusual noise, vibration, smell, or smoke justifies stopping and investigating even without an alarm.

STCW rest hours and no alcohol or drugs apply to all watchkeepers.

Oil Record Book Part I: machinery space operations; Part II: oil tanker cargo and ballast operations.

Entries made without delay, signed by officer in charge; each completed page signed by Master.

Bunkering: pre-bunker meeting, agreed rate, soundings before and after, continuous monitoring, drip trays, agreed stop signal.

Engine room log records pressures, temperatures, fuel consumed, running hours, and incidents contemporaneously.

Permit-to-work required for hot work, enclosed space entry, and electrical or pressurized system work.

Defect reports and PM records support class surveys; falsification is a criminal offence.

Oil Record Book entries retained at least three years under MARPOL Annex I.

PM scheduled by running hours or calendar, whichever comes first; condition monitoring can extend intervals only with justification.

Oil analysis: rising Fe with steady viscosity suggests ring/liner wear; rising water suggests cooler leakage.

Isolate, depressurize, drain, and tag out before opening machinery; verify zero energy state.

Crankshaft deflection readings detect bedplate distortion and bearing wear; compare to maker's limits.

Follow maker's clearances and torque values for valve grinding, pump overhaul, and heat exchanger cleaning.

Rubber goods and gaskets have shelf lives and must be rotated in stores.

Repairs to class-relevant machinery require surveyor notification before return to service.

Centrifugal pumps must be primed; start with discharge closed and open slowly; running dry damages seals and wear rings.

Positive displacement pumps need a relief valve and must never run dry.

Boiler: low-water trip, daily blowdown, safety valve lift test; scale causes overheating and efficiency loss.

Steering gear tested before departure and every watch at sea; SOLAS requires changeover within 45 seconds and two independent power units.

Air compressor: blow intercooler and aftercooler drains; high discharge temperature suggests valve or cooler fouling.

Deck machinery brakes and load limits must be tested and marked; hydraulic filters and oil condition checked.

Fuel purifier gravity disc and throughput affect water removal; carry-over damages injectors.

Insulation resistance measured with megohmmeter; typically at least 1 MΩ for machinery per class rules.

Current above about 30 mA through the body can be fatal; RCDs and earth leakage protection reduce risk.

Isolate, lock off, prove dead, and discharge capacitors before working on electrical equipment.

Generator paralleling: match voltage, frequency, and phase; kW sharing by governor droop, reactive load by excitation.

AVR maintains terminal voltage; loss of excitation causes voltage collapse and reactive power import.

Test alarms and sensors periodically; a faulty sensor can cause spurious trip or mask a real fault.

Battery rooms need ventilation and no naked lights; hydrogen is explosive above about 4%.

Engine room bounded by collision bulkhead forward, aft peak bulkhead aft, and tank top; subdivision limits flooding.

Double bottom tanks under engine room hold fuel, lube oil, and ballast; soundings and air pipes must be clear and marked.

Longitudinal girders, floors, and brackets transmit loads; cracks at bracket toes are stress concentrations to report.

Sea water inlet chests and strainers must be accessible; blockage causes loss of cooling.

Stern tube and shafting pass through aft peak; monitor stern gland leakage and bearing temperature.

Sacrificial anodes and coatings protect against wastage; coating breakdown reported at surveys.

Watertight doors operable from both sides and tested; never wedged open at sea.

Free surface effect from slack tanks reduces GM; press up or empty tanks to limit it.

Flooding a machinery space adds weight and free surface; respond with bilge pumps, emergency pump, and watertight closures.

Damage control sequence: sound bilges, find source, isolate compartment, close watertight doors, start emergency bilge suction.

Emergency generator and emergency fire pump are outside the main machinery space and must be tested regularly.

Plan and monitor ballast and fuel transfers; calculate list and trim effects.

Angle of loll is corrected by reducing free surface and lowering weights, not by adding top weight.

STCW minimum rest: 10 hours in any 24-hour period and 77 hours in any 7-day period.

EOOW certificate requires approved sea service, training, and passing the flag state examination.

SOLAS II-1 covers machinery and electrical installations; II-2 covers fire protection, including machinery spaces.

MARPOL: Annex I oil, IV sewage, V garbage, VI air pollution including sulphur limits.

Flag state implements conventions; port state control may detain for machinery, pollution, or certification deficiencies.

Master has overriding authority; Chief Engineer is responsible for machinery and its records.

Certificate of competency revalidated every five years with sea service or approved training.

MARPOL Annex I: no oil discharge in special areas; outside them, machinery space bilge water limited to 15 ppm through approved equipment.

Oil-water separator 15 ppm alarm and automatic stopping device must be functional; bypassing is a criminal offence.

Engine room fire: alarm, stop fuel, shut down ventilation, release fixed CO2 only after confirming evacuation and closing boundaries.

Enclosed space entry: test oxygen (19.5–23.5%), hydrocarbons, and toxic gases; standby person and permit required.

Test emergency generator, emergency fire pump, and emergency lighting weekly and record.

Spill response: stop source, contain, notify bridge and Master, record in Oil Record Book.

SOLAS drills: fire, abandon ship, oil spill response; musters and debriefs recorded.

Fatigue degrades vigilance; STCW rest hours and watch rotation are the primary controls.

Structured handover: machinery state, defects, ongoing work, permits, expected events.

Just culture separates human error from reckless violation; near-miss reporting encouraged without blame.

Toolbox talk before complex jobs identifies hazards, permits, isolation points, and emergency arrangements.

Closed-loop communication (order repeated back) reduces misunderstanding during manoeuvring and emergencies.

Too steep an authority gradient suppresses reporting; too flat causes indecision in emergencies.

Cross-cultural crews need plain technical English and confirmation of understanding for alarms and orders.

Scavenge air must exceed cylinder pressure or exhaust blows back into the receiver.

Pmax falling at constant fuel index indicates leaking exhaust valve, worn rings, or late injection.

Pass through critical or barred speeds quickly; never hold there.

Turbocharger surge causes: compressor fouling, air cooler blockage, sudden load change.

Propeller law: P ∝ N³, Q ∝ N².

Sticking fuel valve needle raises that unit's exhaust temperature and can cause afterburning.

Disengage turning gear before admitting starting air.

Cylinder oil feed set by load; under-lubrication causes liner scuffing.

UMS mode only with proven alarms and automation and with the bridge informed.

Handover: machinery status, defects, tank levels, transfers, permits.

Acknowledge and log bridge engine orders in the bell book with time and direction.

Investigate alarms, do not just silence them; report repeated alarms to the Chief Engineer.

Pre-watch checks: sump and cooling water levels, fuel and lube pressures, exhaust temperatures, running hours.

Unusual noise, vibration, smell, or smoke justifies stopping and investigating.

STCW rest hours and no alcohol or drugs apply to all watchkeepers.

Oil Record Book Part I: machinery space; Part II: oil tanker cargo and ballast.

Entries without delay, signed by officer in charge; each page signed by Master.

Bunkering: pre-bunker meeting, agreed rate, soundings, continuous monitoring, drip trays, stop signal.

Engine room log: pressures, temperatures, fuel consumed, running hours, incidents, contemporaneous.

Permit-to-work for hot work, enclosed space entry, electrical and pressurized system work.

PM and defect records support class surveys; falsification is a criminal offence.

Oil Record Book retained at least three years (MARPOL Annex I).

PM by running hours or calendar, whichever comes first; condition monitoring needs justification to extend.

Oil analysis: rising Fe with steady viscosity suggests ring/liner wear; rising water suggests cooler leak.

Isolate, depressurize, drain, tag out; verify zero energy state before opening.

Crankshaft deflection detects bedplate distortion and bearing wear; compare to maker's limits.

Use maker's clearances and torque values for valve, pump, and heat exchanger work.

Rubber goods and gaskets have shelf lives; rotate stores.

Notify surveyor for class-relevant repairs before return to service.

Centrifugal pumps: prime first, start with discharge closed, open slowly; dry running damages seals.

Positive displacement pumps need a relief valve and must never run dry.

Boiler: low-water trip, daily blowdown, safety valve lift test; scale causes overheating.

Steering gear tested before departure and every watch; SOLAS changeover within 45 seconds, two independent power units.

Air compressor: blow cooler drains; high discharge temperature suggests valve or cooler fouling.

Deck machinery: test brakes, mark load limits, check hydraulic filters and oil.

Fuel purifier gravity disc and throughput affect water removal; carry-over damages injectors.

Insulation resistance with megohmmeter; typically at least 1 MΩ for machinery per class rules.

About 30 mA through the body can be fatal; RCDs and earth leakage protection reduce risk.

Isolate, lock off, prove dead, discharge capacitors before electrical work.

Paralleling: match voltage, frequency, phase; kW by governor droop, reactive load by excitation.

AVR maintains voltage; loss of excitation causes voltage collapse and reactive import.

Test alarms and sensors; a faulty sensor can trip spuriously or mask a fault.

Battery rooms: ventilate, no naked lights; hydrogen explosive above about 4%.

Engine room bounded by collision bulkhead, aft peak bulkhead, and tank top.

Double bottom tanks hold fuel, lube oil, ballast; soundings and air pipes clear and marked.

Girders, floors, brackets transmit loads; cracks at bracket toes are stress concentrations.

Sea water inlet chests and strainers accessible; blockage causes loss of cooling.

Stern tube and shafting through aft peak; monitor gland leakage and bearing temperature.

Sacrificial anodes and coatings limit wastage; report coating breakdown at surveys.

Watertight doors operable from both sides; never wedged open at sea.

Slack tanks create free surface and reduce GM; press up or empty.

Flooding adds weight and free surface; use bilge pumps, emergency pump, watertight closures.

Damage control: sound bilges, find source, isolate compartment, close doors, start emergency bilge suction.

Emergency generator and fire pump located outside main machinery space; test regularly.

Plan ballast and fuel transfers; calculate list and trim.

Correct angle of loll by reducing free surface and lowering weights.

STCW rest: 10 hours in 24 and 77 hours in 7 days.

EOOW certificate: approved sea service, training, and flag state examination.

SOLAS II-1 machinery and electrical; II-2 fire protection including machinery spaces.

MARPOL Annex I oil, IV sewage, V garbage, VI air including sulphur.

Flag state implements conventions; port state control may detain for deficiencies.

Master has overriding authority; Chief Engineer responsible for machinery and records.

CoC revalidated every five years with sea service or approved training.

MARPOL Annex I: no oil discharge in special areas; elsewhere 15 ppm limit via approved equipment.

15 ppm alarm and automatic stopping device must work; bypassing is a criminal offence.

Engine room fire: alarm, stop fuel, shut ventilation, release CO2 only after evacuation and closing boundaries.

Enclosed space: test oxygen 19.5–23.5%, hydrocarbons, toxic gases; standby person and permit.

Test emergency generator, fire pump, emergency lighting weekly and record.

Spill: stop source, contain, notify bridge and Master, record in Oil Record Book.

SOLAS drills: fire, abandon ship, oil spill; record musters and debriefs.

Fatigue degrades vigilance; STCW rest hours and watch rotation are primary controls.

Structured handover: machinery state, defects, ongoing work, permits, expected events.

Just culture separates human error from reckless violation; encourage near-miss reporting.

Toolbox talk identifies hazards, permits, isolation points, emergency arrangements.

Closed-loop communication reduces misunderstanding during manoeuvring and emergencies.

Authority gradient too steep suppresses reporting; too flat causes indecision.

Cross-cultural crews need plain technical English and confirmation of understanding.

Scavenge air pressure must exceed cylinder pressure or exhaust blows back into the receiver.

Pmax falling at constant fuel index indicates leaking exhaust valve, worn rings, or late injection.

Pass through critical and barred speeds quickly; never hold there.

Turbocharger surge: compressor fouling, air cooler blockage, sudden load change.

Propeller law: P ∝ N³, Q ∝ N².

Sticking fuel valve needle raises that unit's exhaust temperature; can cause afterburning.

Disengage turning gear before admitting starting air.

Cylinder oil feed set by load; under-lubrication causes liner scuffing.

UMS mode only with proven alarms and automation and bridge informed.

Handover: machinery status, defects, tank levels, transfers, permits.

Acknowledge and log bridge engine orders in the bell book with time and direction.

Investigate alarms; report repeated alarms to the Chief Engineer.

Pre-watch checks: sump and cooling water levels, fuel and lube pressures, exhaust temperatures, running hours.

Unusual noise, vibration, smell, or smoke justifies stopping and investigating.

STCW rest hours and no alcohol or drugs apply to all watchkeepers.

Oil Record Book Part I: machinery space; Part II: oil tanker cargo and ballast.

Entries without delay, signed by officer in charge; each page signed by Master.

Bunkering: pre-bunker meeting, agreed rate, soundings, continuous monitoring, drip trays, stop signal.

Engine room log: pressures, temperatures, fuel consumed, running hours, incidents, contemporaneous.

Permit-to-work for hot work, enclosed space entry, electrical and pressurized system work.

PM and defect records support class surveys; falsification is a criminal offence.

Oil Record Book retained at least three years (MARPOL Annex I).

PM by running hours or calendar, whichever comes first; condition monitoring needs justification to extend.

Oil analysis: rising Fe with steady viscosity suggests ring/liner wear; rising water suggests cooler leak.

Isolate, depressurize, drain, tag out; verify zero energy state before opening.

Crankshaft deflection detects bedplate distortion and bearing wear; compare to maker's limits.

Use maker's clearances and torque values for valve, pump, and heat exchanger work.

Rubber goods and gaskets have shelf lives; rotate stores.

Notify surveyor for class-relevant repairs before return to service.

Centrifugal pumps: prime first, start with discharge closed, open slowly; dry running damages seals.

Positive displacement pumps need a relief valve and must never run dry.

Boiler: low-water trip, daily blowdown, safety valve lift test; scale causes overheating.

Steering gear tested before departure and every watch; SOLAS changeover within 45 seconds, two independent power units.

Air compressor: blow cooler drains; high discharge temperature suggests valve or cooler fouling.

Deck machinery: test brakes, mark load limits, check hydraulic filters and oil.

Fuel purifier gravity disc and throughput affect water removal; carry-over damages injectors.

Insulation resistance with megohmmeter; typically at least 1 MΩ for machinery per class rules.

About 30 mA through the body can be fatal; RCDs and earth leakage protection reduce risk.

Isolate, lock off, prove dead, discharge capacitors before electrical work.

Paralleling: match voltage, frequency, phase; kW by governor droop, reactive load by excitation.

AVR maintains voltage; loss of excitation causes voltage collapse and reactive import.

Test alarms and sensors; a faulty sensor can trip spuriously or mask a fault.

Battery rooms: ventilate, no naked lights; hydrogen explosive above about 4%.

Engine room bounded by collision bulkhead, aft peak bulkhead, and tank top.

Double bottom tanks hold fuel, lube oil, ballast; soundings and air pipes clear and marked.

Girders, floors, brackets transmit loads; cracks at bracket toes are stress concentrations.

Sea water inlet chests and strainers accessible; blockage causes loss of cooling.

Stern tube and shafting through aft peak; monitor gland leakage and bearing temperature.

Sacrificial anodes and coatings limit wastage; report coating breakdown at surveys.

Watertight doors operable from both sides; never wedged open at sea.

Slack tanks create free surface and reduce GM; press up or empty.

Flooding adds weight and free surface; use bilge pumps, emergency pump, watertight closures.

Damage control: sound bilges, find source, isolate compartment, close doors, start emergency bilge suction.

Emergency generator and fire pump located outside main machinery space; test regularly.

Plan ballast and fuel transfers; calculate list and trim.

Correct angle of loll by reducing free surface and lowering weights.

STCW rest: 10 hours in 24 and 77 hours in 7 days.

EOOW certificate: approved sea service, training, and flag state examination.

SOLAS II-1 machinery and electrical; II-2 fire protection including machinery spaces.

MARPOL Annex I oil, IV sewage, V garbage, VI air including sulphur.

Flag state implements conventions; port state control may detain for deficiencies.

Master has overriding authority; Chief Engineer responsible for machinery and records.

CoC revalidated every five years with sea service or approved training.

MARPOL Annex I: no oil discharge in special areas; elsewhere 15 ppm limit via approved equipment.

15 ppm alarm and automatic stopping device must work; bypassing is a criminal offence.

Engine room fire: alarm, stop fuel, shut ventilation, release CO2 only after evacuation and closing boundaries.

Enclosed space: test oxygen 19.5–23.5%, hydrocarbons, toxic gases; standby person and permit.

Test emergency generator, fire pump, emergency lighting weekly and record.

Spill: stop source, contain, notify bridge and Master, record in Oil Record Book.

SOLAS drills: fire, abandon ship, oil spill; record musters and debriefs.

Fatigue degrades vigilance; STCW rest hours and watch rotation are primary controls.

Structured handover: machinery state, defects, ongoing work, permits, expected events.

Just culture separates human error from reckless violation; encourage near-miss reporting.

Toolbox talk identifies hazards, permits, isolation points, emergency arrangements.

Closed-loop communication reduces misunderstanding during manoeuvring and emergencies.

Authority gradient too steep suppresses reporting; too flat causes indecision.

Cross-cultural crews need plain technical English and confirmation of understanding.