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Gas Tanker Course
More than 2 million students worldwide

Gas Tanker Course

Master the knowledge and practical skills required to operate safely aboard gas tankers carrying LPG, LNG, and petrochemical cargoes. This course covers cargo properties, hazard control, emergency procedures, and regulatory compliance from the ground up. Whether you're advancing your maritime career or meeting certification requirements, this is the training that gets you ready for real operations.

Dedika for businesses

What you will learn:

You will gain a thorough understanding of liquefied gas cargo types, their physical and chemical properties, and the hazards they present. You will learn how gas tanker construction, containment systems, and cargo machinery work together to keep operations safe. The course covers gas detection, atmosphere control, enclosed space entry, and permit-to-work systems in detail. You will study loading and discharging procedures, emergency shutdown systems, and fire protection measures. Stability calculations, boil-off management, and voyage planning are also included. Environmental compliance, leadership principles, and incident investigation round out your training for a complete operational picture.

How you study in practice Gas Tanker Course

How you practise Gas Tanker Course

For companies looking to train their team

With Dedika for businesses, the course includes exercises and examples tailored to your own business and the specific needs of your company.

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Course content

8 Chapters • 39 LessonsDuration between 4 and 360 hours (you decide)

Chapter 1See details

Gas Tanker Industry Foundations

  • Lesson 1 • Types of Gas Tankers

    Covers fully pressurised, semi-refrigerated, and fully refrigerated vessel designs. Connects hull and tank configuration to cargo compatibility decisions.

  • Lesson 2 • International Regulatory Framework

    Introduces the international gas carrier codes, flag state requirements, and port state control expectations. Grounds students in compliance obligations before operational topics.

  • Lesson 3 • Liquefied Gas Cargo Categories

    Distinguishes LPG, LNG, petrochemical gases, and ammonia by physical state and hazard profile. Provides the cargo knowledge base for all subsequent chapters.

  • Lesson 4 • Gas Tanker Commercial Operations

    Explains charter party terms, cargo measurement, and voyage economics specific to gas trades. Links commercial awareness to safe operational decision-making.

Chapter 2See details

Properties and Hazards of Liquefied Gases

  • Lesson 1 • Toxicity and Asphyxiation Risks

    Covers exposure limits, physiological effects, and oxygen deficiency hazards for toxic gas cargoes. Prepares students to select and use appropriate personal protective equipment.

  • Lesson 2 • Flammability and Explosion Hazards

    Defines flammable limits, ignition energy, and vapour cloud behaviour for common gas cargoes. Establishes the scientific basis for gas detection and hot-work controls.

  • Lesson 3 • Reactivity and Cargo Compatibility

    Analyses polymerisation, corrosion, and incompatibility reactions relevant to gas cargoes. Guides students in preventing dangerous cargo interactions during loading and carriage.

  • Lesson 4 • Physical Properties of Liquefied Gases

    Examines boiling point, vapour pressure, density, and specific volume for key cargoes. These properties directly govern tank design limits and cargo handling parameters.

  • Lesson 5 • Cryogenic Hazards and Cold Burns

    Addresses the specific dangers of cryogenic liquids including embrittlement and cold burns. Connects material science to safe handling procedures for LNG and ethylene.

Chapter 3See details

Gas Tanker Construction and Equipment

  • Lesson 1 • Pressure and Temperature Control Systems

    Explains reliquefaction plants, boil-off management, and cargo heater operation. Demonstrates how thermal control maintains cargo within safe design parameters.

  • Lesson 2 • Cargo Piping and Valve Systems

    Details liquid and vapour line configurations, valve types, and emergency shutdown integration. Students trace cargo flow paths and identify isolation points.

  • Lesson 3 • Instrumentation and Alarm Systems

    Reviews level gauging, pressure transmitters, gas detection, and high-level alarms. Connects instrument accuracy to safe cargo quantity management and hazard detection.

  • Lesson 4 • Cargo Pumps and Compressors

    Covers deepwell, submerged, and centrifugal pump types alongside vapour compressor operation. Links pump selection to cargo properties and discharge rate requirements.

  • Lesson 5 • Cargo Tank Types and Design

    Compares independent, integral, and membrane tank designs against cargo and temperature requirements. Provides the structural context for all cargo handling procedures.

Chapter 4See details

Gas Detection and Atmosphere Control

  • Lesson 1 • Hazardous Zone Classification

    Defines zone 0, 1, and 2 areas on gas tankers and the equipment standards required in each. Enables students to enforce electrical and ignition source controls correctly.

  • Lesson 2 • Atmosphere Control in Cargo Spaces

    Addresses ventilation strategies, purging sequences, and atmosphere verification for cargo holds and void spaces. Directly supports safe enclosed space entry procedures.

  • Lesson 3 • Portable Gas Detection Equipment

    Covers bump testing, calibration, and correct use of portable detectors in various atmospheres. Prepares students for enclosed space entry and hot-work gas testing.

  • Lesson 4 • Principles of Gas Detection

    Explains catalytic bead, infrared, electrochemical, and photoionisation sensor technologies. Grounds equipment selection in the physical and chemical properties of target gases.

  • Lesson 5 • Fixed Gas Detection Systems

    Reviews system architecture, sampling points, alarm logic, and maintenance of fixed installations. Connects system design to the vessel's hazardous zone classification.

Chapter 5See details

Cargo Operations: Loading and Discharging

  • Lesson 1 • Loading Operations Management

    Guides students through connection, initial flow, topping-off, and disconnection during loading. Emphasises rate control, ullage monitoring, and overflow prevention.

  • Lesson 2 • Tank Preparation and Inerting

    Details gas-freeing, inerting, and gassing-up sequences for tank changeover. Prepares students to manage atmosphere transitions without creating flammable or explosive conditions.

  • Lesson 3 • Discharging Operations Management

    Covers pump start-up, stripping, and tank stripping to maximise cargo outturn. Links discharge efficiency to commercial performance and terminal requirements.

  • Lesson 4 • Ship-Shore Interface and Communication

    Addresses information exchange, emergency signal systems, and terminal coordination throughout transfer. Reinforces that effective communication is a primary safety control.

  • Lesson 5 • Pre-Transfer Planning and Checklists

    Covers ship-shore safety checklists, cargo calculation, and communication protocols before transfer. Establishes the planning discipline that underpins all cargo operations.

Chapter 6See details

Enclosed Space Entry and Permit Systems

  • Lesson 1 • Enclosed Space Hazard Identification

    Identifies oxygen-deficient, toxic, and flammable atmospheres found in gas tanker enclosed spaces. Establishes the hazard baseline that justifies the permit-to-work system.

  • Lesson 2 • Rescue from Enclosed Spaces

    Trains students in non-entry rescue methods, resuscitation, and coordination with emergency services. Prevents the common tragedy of rescuers becoming additional casualties.

  • Lesson 3 • Pre-Entry Atmospheric Testing

    Details the sequence and acceptance criteria for oxygen, flammable gas, and toxic gas testing before entry. Ensures students can make a scientifically sound entry decision.

  • Lesson 4 • Permit-to-Work System Operation

    Explains permit issuance, authorisation levels, validity periods, and cancellation procedures. Connects permit discipline to the prevention of unauthorised and unsafe entries.

  • Lesson 5 • Entry Procedures and Standby Duties

    Covers entrant briefing, communication lines, standby person responsibilities, and rescue readiness. Reinforces that the standby role is as critical as the entry itself.

Chapter 7See details

Safety Systems and Emergency Procedures

  • Lesson 1 • Gas Tanker Emergency Scenarios

    Analyses cargo release, fire, explosion, and toxic gas escape scenarios with structured response sequences. Builds decision-making speed and accuracy under simulated pressure.

  • Lesson 2 • Emergency Plans and Drills

    Covers shipboard emergency plan structure, drill design, and post-drill critique methodology. Reinforces that practised procedures reduce response time and error rates.

  • Lesson 3 • Personal Protective Equipment for Gas Hazards

    Details chemical protective suits, SCBA, and escape breathing devices appropriate to gas tanker hazards. Ensures students can select, don, and maintain PPE correctly.

  • Lesson 4 • Fire Prevention and Protection Systems

    Covers dry powder, water spray, and foam systems specific to gas tanker fire scenarios. Connects system selection to the flammability characteristics of gas cargoes.

  • Lesson 5 • Emergency Shutdown Systems

    Explains ESD system logic, activation points, and integration with cargo and mooring systems. Prepares students to initiate and verify a full emergency shutdown correctly.

Chapter 8See details

Advanced Cargo Management and Stability

  • Lesson 1 • Boil-Off Management and Cargo Conditioning

    Explains boil-off rate calculation, reliquefaction decisions, and cargo conditioning for delivery specification. Links thermal management to commercial and safety outcomes.

  • Lesson 2 • Structural Stress and Sloshing

    Addresses longitudinal bending stress, shear force limits, and sloshing loads in partially filled tanks. Guides students in avoiding structural damage during cargo operations.

  • Lesson 3 • Stability Principles for Gas Tankers

    Applies metacentric height, free surface effect, and dynamic stability concepts to gas tanker loading conditions. Connects stability theory to practical loading sequence decisions.

  • Lesson 4 • Cargo Calculation and Planning

    Covers density correction, volume-to-mass conversion, and multi-grade cargo planning for gas tankers. Provides the quantitative foundation for accurate cargo documentation.

  • Lesson 5 • Voyage Planning for Gas Tankers

    Integrates weather routing, port approach constraints, and cargo condition monitoring into a complete voyage plan. Demonstrates how operational decisions interact across the full voyage.

Certification

Your valid completion certificate

This course is for you:

  • Deck officers: seeking to qualify for gas tanker assignments at sea.

  • Junior officers: building specialised credentials to accelerate their promotion track.

  • Experienced ratings: transitioning into officer roles aboard gas-carrying vessels.

  • Shore-based maritime professionals: needing operational fluency to support gas tanker fleets.

  • Career changers: entering the maritime industry through the specialised gas tanker sector.

  • Port state and terminal inspectors: deepening technical knowledge of gas tanker operations.

What our students say

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I like how the lessons are straight to the point and how I can change chapters and skip content I don't need.
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