Motion Sickness Incidence (MSI) Prediction on 80 M LNG Ship Carrier

The motion of ships is move up and down or shocking on the high seas caused by large and continuous waves can cause symptoms of illness in the form of dizziness, nausea and even vomiting which is often termed as seasickness (sea sickness or motion sickness). In this research, a study was conducted on the results of calculations and simulations of the vertical acceleration of the LNG ship's movement so that it could be seen the performance of the ship on crew comfort. Overall Motion Sickness Incidence (OMSI), is also presented as one of the outputs for this crew comfort level prediction, where in this OMSI calculation uses 3 different sea-states and also in each sea-state it is simulated with 3 types of periods (Tz) at service speed (Vs) 20 knots. ISO 2631 standard states seasickness is not experienced at speed 20 at 45, 135 or 180 degrees. After 8 hours, seasickness occurs when hit by 90 degrees. Moderate water conditions and rough water do not cause motion sickness at 0 and 45 degrees.