At present, the cruise ship design technology introduced from abroad in China does not include the real ship verification technology for the safety return system function, and the safety return system function method and verification means vary depending on the ship owner, classification society requirements, and the conditions of the shipyard where it is built. In this paper, based on the target ship design and safe return requirements, all the premises that meet the accident threshold definition of SOLAS Convention will be used as the samples for potential sampling analysis, and the risk probability sampling principle will be used to analyze each premises on the ship, and the premises with the highest risk will be selected to simplify the inspection process of safe return.


In recent years, "passenger ship safety" has been a hot issue in the shipping industry. 100 years after the catastrophe of the "Titanic" cruise ship, on January 13, 2012, the tragedy of the luxury cruise ship "Costa Concordia" was re-enacted, and the luxury cruise ship "Costa Concordia", an Italian cruise company with 4,229 passengers and crew, capsized off the island of Giglio, Italy, and 32 people were killed; A fire on the passenger ship Scandinavian Star in 1988 killed 158 people; The sinking of the passenger ship Estonia in 1994, killing more than 850 people, was the same as the 1987 shipwreck of the Free Enterprise Herald, which was caused by the accumulation of water on the deck that caused the ship's stability to deteriorate and caused the ship to capsize; In 2006, the passenger ship Star Princess suffered a fire accident. The fire first broke out on the exterior balcony and then spread to the deck. (Xia, 2019)

Passenger ships built around the world, especially luxury cruise ships, are growing in size and carrying more passengers. When passenger ships are shipwrecked, they often cause tragic loss of life and property due to the limited rescue capacity at sea. The International Maritime Organization is increasingly concerned about the safety performance of passenger ships and has put forward an idea: it is hoped that these passenger ships can be used as their own "lifeboats" in the event of a shipwreck. After some period of discussion, in August 2006, the Maritime Safety Committee (MSC) adopted resolution MSC.216(82), (Qiu and Chen, 2017) which amends the SOLAS Convention on system performance and operational data following passenger ship flooding accidents and adds a new requirement for "safe return". In June 2010, MSC also provided a specific explanation of the system capability assessment after a fire or flooding incident in passenger ships through circular MSC.1/Circ.1369, of which Article 7 clearly states that the required assessment of ship system capability should be carried out in a manner that submits the design balance to be followed to achieve ship system capability and outlines the entire process of the assessment, including test methods and test facilities provided.

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