Marine pilot trainee´s mental workload for simulator based training using R-R interval

The purpose of this study is that we grasp the value of mental workload for pilot trainee (PT) using a heart rate monitor when they drill in a ship-handling simulator, and that we evaluate the effectiveness of the simulator to supply the place of a real ship based on a trend of the mental workload. The R-R interval data of subjects with a heart rate monitor have accumulated while they train for three months. The data is processed by Spline function interpolation and MEM (Maximum Entropy Method), and then we calculate LF/HF value of the data. The calculated value evaluates mental workload; we originally set a standard value and some values over the value show subject´s stress condition. We summarize the number of times of subject´s stress condition, and find the trend of their mental workload compared with the events of simulator scenarios for ship handling. Finally, we analyze a period when subjects feel stress, and simulator scenario where they are not good at ship handling.