Stress Analysis of Master while Sailing Entering Makassar Port Using Heart Rate Variability (HRV) Data and Simulator

Maritime is one unity of a system consisting of transportation in waters, ports, safety and security, and protection of the maritime environment up to the present moment. This transport system plays a crucial role in driving the economy and fostering national unity. This research attempts to reveal levels of stress experienced by the Master (Captain) through simulation using the Heart Rate Variability (HRV) data measurement instrument. This research is conducted using both qualitative and quantitative methods. Data collection techniques were carried out through a questionnaire (survey) to gauge perceptions of experiences during the simulator, documentation, and measurements using the HRV monitor tool. Data analysis techniques involved processing data that is in non-numerical form and focusing on its quality. This study shows that although the Regulation for the Prevention of Collisions at Sea (COLREG) has been taught in shipping schools in Indonesia, human factors remain the primary reason for accidents at sea, contributing to 46.7%, which is influenced by a lack of understanding of the aforementioned regulations. The research experiment during a voyage on entering the Makassar port reveals that encountering other vessels during navigation significantly increases the stress levels of the Captain. The highest stress levels are experienced when other vessels approach from certain angles, especially in head-on, crossing at 90 degrees from the left, and at a 135-degree angle from either the left or right. In addition, age and the captain's experience have no significant relationship with stress levels in this situation.