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REQUIRED KNOWLEDGE |
This describes the knowledge required for this unit. |
1 | Relevant sections of IMO STCW 95 Code and AMSA Marine Orders applicable to liquefied gas tankers |
2 | Relevant OH&S and pollution control legislation, codes of practice, policies and procedures |
3 | The basic principles and trends in liquefied gas tanker design and cargo containment and handling systems: |
| a | types and design of liquefied gas tankers and their equipment |
| b | cargo containment systems with special reference to rules, surveys, tank construction, materials, coatings, insulation and compatibility |
| c | cargo handling equipment, including pumps and pumping arrangements, vapour-return systems, piping systems and valves |
| d | cargo conditioning systems, including warm up and cool down procedures |
| e | tank atmosphere control systems, including the use of inert gas and nitrogen |
| f | instrumentation of cargo containment and handling systems, including that of gauging, sampling and temperature control and pressure monitoring systems |
4 | Procedures and regulatory requirements for loading, discharge, handling and condition monitoring of liquefied gas cargo, including: |
| a | cargo loading and discharging preparations and procedures |
| b | Checklists |
| c | cargo condition maintenance on passage and in harbour |
| d | segregation of cargoes |
| e | procedures for cargo transfer and changing cargoes |
| f | tank cleaning procedures |
| g | cargo sampling |
| h | ballasting and deballasting |
| i | warm up and gas freeing procedures |
| j | cooling down of a gas-free system from ambient temperature and the safety precautions involved |
| k | emergency procedures, i.e. pre-planned action in the event of leaks, fire, collision, stranding, emergency cargo discharge and personnel casualty |
5 | Cargo tank vent systems and procedures: |
| a | types of filters, strainers, expansion devices and flame screens used |
| b | the storage, generation and distribution systems for the most commonly used inert gas systems |
| c | liquid recirculation and reliquefaction systems |
| d | cargo boil-off systems and auxiliary systems |
| e | the function and use of gas detection and monitoring systems and CO2 monitoring systems |
| f | the firefighting, safety and rescue systems appropriate for liquefied gas tankers |
6 | Liquefied gas cargo handling systems and equipment and the procedures for their use |
7 | Principles of liquefied gas cargo containment, including: |
| a | containment systems |
| b | rules |
| c | surveys |
| d | tank construction |
| e | materials |
| f | coatings |
| g | insulation |
| h | compatibility |
8 | The properties and characteristics of liquefied gases and their vapours, including: |
| a | the definition of gas |
| b | simple gas laws |
| c | the gas equation |
| d | density of gases |
| e | diffusion and mixing of gases |
| f | compression of gases |
| g | liquefaction of gases |
| h | refrigeration of gases |
| i | critical temperature |
| j | the practical significance of flashpoint |
| k | upper and lower explosive limits |
| l | auto-ignition temperature |
| m | compatibility of gases |
| n | reactivity |
| o | polymerisation |
| p | inhibitors |
9 | The properties of single liquids, including: |
| a | densities of liquids and vapours |
| b | variation with temperature |
| c | vapour pressure and temperature |
| d | enthalpy, vaporisation and boiling liquids |
10 | The nature and properties of solutions, including: |
| a | the solubility of gases in liquids |
| b | miscibility between liquids |
| c | effects of temperature change |
| d | densities of solutions and dependence on temperature and concentration |
| e | effects of dissolved substances on melting and boiling points |
| f | hydrates, their formation and dispersion |
| g | hygroscopicity |
| h | drying of air and other gases |
| i | dewpoint and low-temperature effects |
11 | Principles of toxicity of liquefied gas, including: |
| a | the modes by which liquefied gases and their vapours may be toxic |
| b | the toxic properties of inhibitors and of products of combustion of both materials of construction and of liquefied gases carried |
| c | acute and chronic effects of toxicity |
| d | systemic poisons and irritants |
| e | the threshold limit value (TLV) |
| f | hazards of skin contact, inhalation and ingestion |
| g | medical first aid and administering of antidotes |
12 | Maritime communication techniques as they are applied in the loading, discharge, handling and condition monitoring of liquefied gas cargo |
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REQUIRED SKILLS |
This describes the basic skills required for this unit. |
1 | Read and interpret instructions, regulations, procedures and information relevant to the management of the handling, loading and discharging of liquefied gas cargoes |
2 | Communicate effectively with others during the handling, loading and discharging of liquefied gas cargoes |
3 | Provide leadership to others during the handling, loading and discharging of liquefied gas cargoes |
4 | Take appropriate initiatives related to the handling, loading and discharging of liquefied gas cargoes |
5 | Interpret and apply security and safety practices and regulations when managing the handling, loading and discharging of liquefied gas cargoes |
6 | Modify activities dependent on differing workplace contingencies, risk situations and environments |
7 | Identify and solve problems associated with the handling, loading and discharging of liquefied gas cargoes and take appropriate action based on available information |
8 | Monitor and anticipate problems and risks related to the handling, loading and discharging of liquefied gas cargoes, and take appropriate action |
9 | Adapt to differing types of vessels, port facilities, cargoes and equipment |
10 | Monitor the use of equipment related to the handling, loading and discharging of liquefied gas cargoes |