Significance analysis of ship operational states as a factor influencing the energy efficiency of a research – training vessel

Ship operational state is a sequence of temporary values of state variable parameters expressing the properties of a particular object and which are recognised as significant for a specific problem. They are the key elements of the operational tasks and essential to determining the Energy Efficiency Operational Indicator for a specialised vessel. In that case, the method refers directly to specific operational states and their significance for a particular operational task in the time function. Based on the surveys conducted on a population of people employed by the ship owner and involved in the ship operation, one has analysed the significance of the operational states for that vessel. The differentiated perception of the operational states of the subjected vessel results from, inter alia, the tasks performed by the responders as their duties, their experience and the level of their engagement in the ship operation. A qualitative and quantitative analysis of the states enables to conduct the planning process in terms of operational tasks of the specialized ship for effective and efficient operation.