Smartphone-measured hull vibration records from a training ship for main-engine rotational-speed identification

Three-axis acceleration records measured with a consumer smartphone (Samsung Galaxy Z Fold7, phyphox v1.2) placed on furniture inside the accommodation of the training ship Baek-kyung during a deep-sea training voyage in July 2026. Seven records (DATA1–DATA7) cover three measurement locations and four operating conditions: normal operation, at anchor, alongside, transient departure, and reduced-speed operation. Each CSV contains a time column (s) and three acceleration columns (m/s², including the gravitational component). Sampling frequencies are 425.7–455.1 Hz; record lengths are 507–619 s.