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The accurate assessment of a ship-s dynamic behavior is essential for understanding its stability characteristics, particularly in response to free oscillations such as roll decay. This study presents the development and application of a compact, cost-effective inertial measurement system based on the Bosch BMX160 IMU sensor, integrated with a Raspberry Pi 4 single-board computer, for measuring ship model free oscillations both in water and in a controlled air environment. The system enables remote data acquisitio...