ABSTRACT: The inflatable liferaft layout applied to passenger ships for the effectiveness of the evacuation process must be based on IMO MSC.1/Circ. 1533 regulations with the maximum evacuation duration is n ≤ 60 minutes. Based on the data from KNKT, in 2021, sea transportation became the biggest contributor to accidents with 342 people dying and missing. Liferaft is one of the main safety tool used during an emergency to save the people and leave the ship. This study used Thunderhead Pathfinder software which was Agent Based Evacuation Simulation combined with 3-D simulation results. The modeling was conducted with two types of layout liferaft and two scenarios of dangerous conditions, the first was a fire in the engine room and the second is the ship experiencing a 20° of heel. The results of this study indicate that there was a difference in the total evacuation duration between the existing layout and the layout that has been changed according to the writer's suggestion. In fire conditions there is a difference of 1 minute 18 seconds in case 1, 1 minute 16 seconds in case 2, 1 minute 38 seconds in case 3, and 22 seconds in case 4. In the heel condition there is a difference of 1 minute 19 seconds in case 1 and 1 minute 25 seconds in case 2. The results of the evacuation simulation modeling with the liferaft layout on the navigation deck that have been modified according to the writer’s suggestion in all cases are getting a value of n ≤ 60 minutes and also have complied with the IMO MSC.1/Circ. 1533 regulations.

KEYWORDS: Safety at Sea, Evacuation Process, Liferaft, Passenger Ships, Inflatable Liferaft, National Transportation Safety Committee (KNKT), Evacuation Analysis, Evacuation Simulation Modeling

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