Croatia Chief Engineer Officer key terms

A permanent hull marking showing the maximum permitted draught in different seasons and water densities, assigned under the International Convention on Load Lines. The chief engineer must ensure ballast and cargo loading keep the ship within the applicable mark.

The vertical distance from the waterline to the upper edge of the freeboard deck at side. It is the reserve buoyancy indicator and is controlled by the load line assignment; reducing freeboard illegally compromises stability and seaworthiness.

The watertight volume of the hull above the waterline, expressed as the buoyancy available before the ship is completely submerged. It allows the vessel to survive flooding or additional weight without sinking.

The distance between the centre of gravity and the metacentre. A small positive GM gives a stiff or tender ship; the chief engineer influences GM by managing ballast, bunkers and consumables distribution.

The apparent rise in the centre of gravity caused by liquid moving freely in a partly filled tank. It reduces effective metacentric height and can cause dangerous loss of stability, so tanks should be pressed up or emptied.

Planned measures and equipment used to limit flooding, fire or structural failure after an incident, including watertight closures, damage control parties and emergency pumps. Drills must be logged and understood by engineering staff.

The division of the hull into compartments by watertight bulkheads, decks and closures so that flooding remains contained. The chief engineer must keep penetrations, glands and remote closures in good order and tested.

A vertical partition separating compartments of the hull, either watertight, oiltight or non-watertight. It provides subdivision, structural strength and fire boundaries; penetrations must maintain the required integrity.

The total weight a ship can carry, comprising cargo, bunkers, fresh water, ballast, stores and crew, measured as the difference between loaded and light displacement. It is commonly used in loading and charter calculations.

The mass of water displaced by the hull, equal to the ship's total mass afloat. It is calculated from draught and hydrostatic tables and underpins stability, loading and dry-docking calculations.

A large slow-speed marine diesel in which the piston is connected to a crosshead and connecting rod, separating combustion space from the crankcase. It usually drives the propeller directly and burns heavy fuel oil.

An exhaust-gas-driven turbine driving a compressor that supplies pressurised scavenge air to the engine cylinders. Surging, fouling and bearing failure are common faults; water washing and vibration monitoring are routine maintenance tasks.

Air delivered to the cylinder to remove exhaust gases and supply oxygen for combustion. Its pressure and temperature directly affect combustion quality, thermal load and specific fuel consumption.

A heat exchanger cooling compressed scavenge air before it enters the cylinder, increasing air density and reducing thermal stress. Fouling or water carry-over causes high exhaust temperatures and must be monitored.

The crank angle at which fuel injection begins relative to top dead centre. Incorrect timing causes high exhaust temperatures, knocking or power loss, and is checked with indicator diagrams and pump settings.

A pressure-volume or pressure-crank angle plot taken from a cylinder, used to assess combustion quality, peak pressure and power balance between units. The chief engineer reviews these during performance monitoring.

The sealing arrangement where the propeller shaft passes through the stern tube or bulkhead, preventing water ingress or oil loss. Excessive leakage or overheating indicates worn packing or seal failure requiring attention.

The bearing housing through which the propeller shaft passes at the stern, lubricated by oil or water. Bearing wear, seal leakage and lubrication condition are monitored as part of shafting maintenance.

The geometric and elastic alignment of the propeller shafting and engine crankshaft so that bearing loads remain within limits. Misalignment causes bearing overheating, vibration and possible shaft or coupling failure.

A structured, usually computerised schedule of inspections, servicing and overhauls based on running hours, condition or calendar intervals. It provides records for classification surveys and supports defect tracking and spare parts planning.

Measuring parameters such as vibration, temperature, oil analysis and performance trends to detect developing faults before failure. It supports condition-based maintenance decisions and evidence for surveyors.

Laboratory examination of lubricant samples for wear metals, water, viscosity and contamination. Trends reveal bearing wear, fuel dilution or cooling water ingress, allowing timely intervention before damage occurs.

Supplying oil or grease between moving surfaces to reduce friction, remove heat and carry away contaminants. Correct grade, pressure and flow are essential; failure leads rapidly to bearing seizure and machinery damage.

A component supporting a rotating shaft and carrying load while minimising friction. Plain, roller and thrust bearings require correct clearance, lubrication and alignment; overheating or abnormal noise signals imminent failure.

Inspection and testing by a classification society to verify that structure and machinery comply with its rules. Surveys may be annual, intermediate, special or continuous, and the chief engineer must prepare machinery for examination.

A certificate issued under international conventions, such as safety construction, safety equipment, MARPOL or load line, confirming compliance. Validity depends on surveys and on correcting deficiencies within agreed periods.

Inspection of foreign ships in port to verify compliance with international conventions. Detainable deficiencies, including machinery and pollution prevention defects, must be rectified and can affect the ship's commercial operation.

The International Safety Management Code requires companies and ships to operate a documented safety management system with defined responsibilities, procedures and emergency preparedness. The chief engineer implements machinery-related procedures and records.

The documented structure of policies, procedures, checklists and records required by the ISM Code. It covers maintenance, risk assessment, drills and reporting, and is audited internally and by flag and port authorities.

An incident that could have caused harm, damage or pollution but did not. Reporting and investigating near misses is a core safety culture practice and provides evidence of continuous improvement under the safety management system.

A structured evaluation of hazards, likelihood and consequences, with controls identified before work begins. Permits to work, toolbox talks and job safety analyses rely on it, particularly for hot work and enclosed space entry.

A formal written authorisation controlling high-risk tasks such as hot work, working aloft or machinery isolation. It confirms precautions, isolations and supervision are in place and must be closed out on completion.

Entry into a tank, void or compartment where atmosphere may be deficient or toxic. It requires testing for oxygen, hydrocarbons and toxic gases, ventilation, a standby person and a permit before entry.

Welding, cutting, grinding or any operation producing heat or sparks, permitted only under a hot work permit with fire watch, gas-freeing and removal of combustibles. It is a leading cause of shipboard fire.

A structure such as a bulkhead or deck with a defined fire resistance rating that limits fire spread between zones. Maintaining the integrity of doors, penetrations and insulation is essential to the fire control plan.

A permanently installed suppression system, such as CO2, foam or water mist, protecting machinery spaces or cargo areas. It requires periodic testing, clear operating instructions and crew familiarisation.

A rehearsed exercise simulating fire response, including alarm, muster, boundary cooling, equipment use and rescue. Drills must be conducted at required intervals and recorded for flag and port state inspection.

A designated assembly point where crew or passengers report during emergencies. Clear marking, communication and accounting procedures are required, and the chief engineer ensures engineering staff respond as assigned.

An independent power source, usually diesel-driven, that supplies essential services such as emergency lighting, steering and fire pumps on loss of main power. It must start automatically and be tested regularly.

The measured electrical resistance between an insulated conductor and earth, indicating insulation health. Low readings point to moisture, damage or ageing and require investigation before equipment is energised.

A test applying a high DC voltage to measure insulation resistance of cables, motors or switchboards. Results are compared with previous readings and minimum acceptable values before returning equipment to service.

The deliberate connection of non-current-carrying metalwork to the ship's hull or earth reference, ensuring fault currents trip protection and preventing electric shock. Bonding straps and earth connections must remain intact.

A mandatory MARPOL record of bunkering, transfers, disposal and machinery space bilge operations. Entries must be accurate and signed; falsification or omission is a serious offence leading to detention or prosecution.

The international regulations governing prevention of pollution by oil, covering discharge limits, equipment such as oily water separators and 15 ppm alarms, and record keeping. Compliance is verified by surveys and inspections.

Equipment treating machinery space bilge water to reduce oil content below the permitted discharge limit, typically 15 ppm. Its alarm and automatic stopping device must function and be tested; bypassing is prohibited.

Measures required by the Ballast Water Management Convention to prevent transfer of harmful aquatic organisms, through exchange, treatment systems or record keeping. The chief engineer maintains the treatment plant and logs operations.

Immediate care given by trained crew before professional help arrives, including airway, breathing, circulation, bleeding control and immobilisation. The chief engineer may be a designated first aider under the ship's medical plan.

A dangerous drop in core body temperature caused by cold exposure, immersion or wind chill, producing confusion, slow pulse and loss of consciousness. Treatment requires gradual rewarming and urgent medical advice.

The medicines and equipment carried according to flag requirements and trading area, with expiry dates and controlled drugs recorded. The responsible officer must ensure stock levels, storage conditions and administration records are correct.