Safe Ship Operation Research Articles

A Risk Identification Method for Ensuring AI-Integrated System Safety for Remotely Controlled Ships with Onboard Seafarers

The maritime sector is increasingly integrating Information and Communication Technology (ICT) and Artificial Intelligence (AI) technologies to enhance safety, environmental protection, and operational efficiency. With the introduction of the MASS Code by the International Maritime Organization (IMO), which regulates Maritime Autonomous Surface Ships (MASS), ensuring the safety of AI-integrated systems on these vessels has become critical. To achieve safe navigation, it is essential to identify potential risks during the system planning stage and design systems that can effectively address these risks. This paper proposes RA4MAIS (Risk Assessment for Maritime Artificial Intelligence Safety), a risk identification method specifically useful for developing AI-integrated maritime systems. RA4MAIS employs a systematic approach to uncover potential risks by considering internal system failures, human interactions, environmental conditions, AI-specific characteristics, and data quality issues. The method provides structured guidance to identify unknown risk situations and supports the development of safety requirements that guide system design and implementation. A case study on an Electronic Chart Display and Information System (ECDIS) with an AI-integrated collision avoidance function demonstrates the applicability of RA4MAIS, highlighting its effectiveness in identifying specific risks related to AI performance and reliability. The proposed method offers a foundational step towards enhancing the safety of software systems, contributing to the safe operation of autonomous ships.

Gap analysis and harmonization of International Standards for Maritime Autonomous Surface Ships

Abstract This paper addresses the challenges and solutions associated with the implementation of autonomous ships, focusing on the Maritime Autonomous Surface Ships (MASS) Code developed by the International Maritime Organization (IMO). With the goal of adopting a mandatory goal-based MASS Code by 2030, this study examines the interoperability and standardization requirements necessary for the effective global operation of autonomous ships. The paper analyses the MASS Code in relation to existing international standards, identifies gaps, and proposes standards works to accommodate the emerging technologies. Additionally, it investigate on the application of Autonomous Navigation Systems (ANS) and introduces the concepts of Shore ANS and Shore Bridge to enhance remote control capabilities. The analysis emphasizes the need for comprehensive standardization to ensure the safe and efficient operation of autonomous ships in diverse maritime environments.

Methodology for Real-Time Torque Estimation in a Ship Propulsion Digital Twin

Abstract The safe operation of ships requires the condition of propulsion components to be maintained. Digital twins are a promising alternative for intelligent monitoring of these complex systems. Digital twins require models which ensure that the digital representation is able to mimic the behavior of the physical system. Alternate modeling solutions must be found when intellectual property restrictions or lack of available information limit the usability of physics-based models. This paper considers such a case where a system model of the propulsion system requires a real-time capable model of the propeller hydrodynamic torque. The creation of a data-driven hydrodynamic torque model based on full-scale, operational measurements is discussed. The described method focuses on the significant challenges associated with data cleaning and preparation while also evaluating whether well-known machine learning methods are suited for this application. The methods use speed-over-ground, heading, course, rotational speed, and propeller pitch as inputs. The outputs of the models are the single quadrant propeller torque coefficient and the amplitude of harmonic torsional excitation. These outputs are then combined to create a holistic prediction of the torque. Results indicate that both a polynomial least-squares fit and a shallow neural network predict the mean and the amplitude of harmonic components of the torque well. This prediction can be used to isolate the hydrodynamic torque when more than one torque source is present or to simulate what-if scenarios in a digital twin environment.

Detection technology application based on spectral subtraction and vibro acoustic principle in the measurement of ship reliability level

Introduction: As an important part of ship manufacturing, parts are of great significance in the calculation of its reliability level.Methods: To achieve rapid damage detection of ship parts, a method for measuring the reliability level of ship casting and forging parts based on spectral subtraction and vibration-acoustic principles was proposed. This method improves the spectral subtraction method by adding a percussion vibration signal and time-frequency analysis, and uses the principle of resonance acoustics to complete the construction of the test platform to obtain the natural frequency of the part and achieve non-destructive testing of the part.Results: The results show that using the Fabric data set as the task data set for experiments, the accuracy of the research method is 98.54%; the uncertainty is 5.58; the sensitivity detection is 0.26 μm. In the comparison of the spectrogram of the sound signal after noise reduction, this method has fewer yellow spots remaining on the spectrogram of the noise reduction sound signal, and almost no excess noise remains. In the comparison of modal simulation data of ship parts, the maximum relative error between the simulation data obtained by this method and the natural frequency value obtained from the experimental data is 2.3%, and there is no value exceeding 2.5%, so the error is small.Discussion: The above results show that this method can obtain more accurate natural frequencies of parts, can effectively calculate the reliability level of ship casting and forging parts, and provides a new method reference for the safe operation of ships.

Classification of Cyber Risks for Sea Vessel’s Voyage Cycle

Modern digital transformation in the shipping industry Shipping 4.0 is accompanied by increased automation and autonomy of the ship. This means strengthening the digitization of the ship's navigation systems (cyber systems). Therefore, the safe operation and navigation of modern ships depends on the adequate operation of cyber-physical systems, which are created on the basis of information and operational technologies. Such interconnections of ship information systems inevitably increase the vulnerability of the ship's digital navigation infrastructure to cyber-attacks. The article examines methods of controlling cyber risks of various origins, which determine the priority of flows, their internal interconnection and relations with the sources of messages that form them. The formalization of the qualitative and quantitative properties of information flows of the voyage cycle using matrix and graph-analytical modeling methods has been carried out. A decomposition of information was built and a cluster of information security of ship maneuvering control was defined, with its access closed for cyber-attacks. In the event of cyber-attacks, it is very important for the navigator to determine the moment of it’s appearance and the state of navigational devices of the bridge. Usually, the working state of the device is determined by the presence of electric current in it. However, only the presence of current in the device during cyber-attacks is not enough to assess its working condition. Inspection and verification of 11 navigation devices on the bridge takes a lot of time, which the navigator does not have in the event of a cyber-attack. Therefore, we propose to introduce an additional function of controlling the working status of each navigational device, and to transmit the results of all devices to a separate navigation cluster Mk of the navigation bridge via shielded cable lines of the vessel without other methods. This will make it possible to gather information about all the devices in one place on the bridge, protect it from cyberattacks, and quickly determine the operating status of all the navigation devices on the bridge. Descriptive modeling of the meaningful categories of the information space of maritime routes during cyberattacks was performed. The proposed classification of cyber risks has a logical structure based on the grouping of message flows, using the cluster connection coefficient between them. This makes it possible to assess the criticality of the impact of cyber-attacks on the ship and to choose ways to reduce their impact on the maneuvering of the ship in the voyage cycle.

Метод оценки факторов, влияющих на вибрацию судового дизеля, вызванную работой цилиндропоршневой группы

The efficiency of the use of the marine fleet is associated with a reduction in the cost of transportation, the need for which is steadily increasing. A significant share of the total transportation costs is occupied by the costs associated with the operation of ships, therefore, reducing these costs is a reserve for reducing the cost of maritime transportation. The problem of increasing the efficiency of the operation of marine vessels is closely related not only to reducing the cost of it, but also to reducing the time for maintenance and repair of ships. The existing system of scheduled preventive maintenance and repair provides for the maintenance and restoration of the normal technical condition of the vessel and its elements with a pre-planned frequency. The transfer of ships to work with extended repair periods is possible only when solving a whole range of engineering and technical measures and scientific research aimed at improving the quality of repairs, the level of technical operation, improving logistics, etc. An essential role in this is played by the use of modern methods and means to determine the technical condition of shipboard devices and mechanisms, primarily engines of shipboard power plants (SEUs), without disassembling them. High vibration loads of SEU parts lead to fatigue stresses, accelerate wear of the contacting surfaces, reducing the reliability and service life of marine diesel engines, therefore monitoring of their vibration activity is important, especially during operation. The safe operation of ships of the transport fleet largely depends on the reliability of marine diesel engines. Technical means of monitoring their operability in the process of work are currently insufficiently effective and need to be improved. It is relevant not only to develop new, more advanced and mobile hardware and software, but also to search for new scientific and methodological approaches to using the information contained in the spectrum of vibration parameters. Marine diesel internal combustion engines are complex systems that involve many variable parameters. The study of such engines requires the use of methods that can be used to systematically investigate the influence of various factors on their operation, in particular, random experimental schemes are used, since they provide systematic control over variable parameters and maximize the accuracy of estimates. The results of the application of the method of ranking the factors influencing the vibration of a marine diesel engine are presented in order to establish the most significant of them. A mathematical model is presented that allows calculating current values and predicting changes in the most significant indicators, among which the most important is the size of the gap between the piston and the cylinder sleeve.

연안여객선 비상훈련 적합증서 모형개발 방향 모색

In recent years, as the public's awareness of safety has increased, high-level passenger ship emergency response capabilities have been required in the field of marine transportation. Therefore, in this study, in order to systematize and advance the emergency response capability (fire suppression, lifesaving, etc.) required in the event of an emergency situation on board, the “1st Passenger Ship Emergency Training Competition” was held in the Incheon area on a pilot basis to contribute to the safety awareness of the people, overcoming mannerisms, and providing various motivations. In addition, the purpose is to analyze the problems identified as a result of the drill, develop a model of the certificate of conformity for emergency training suitable for coastal passenger ships, and ensure the safe operation of passenger ships through the examination stage to verify whether the training is being carried out more systematically and efficiently.

Diagnostic Method for Short Circuit Faults at the Generator End of Ship Power Systems Based on MWDN and Deep-Gated RNN-FCN

Synchronous generators with three phases are crucial components of modern integrated power systems in ships. These generators provide power for the entire operation of the vessel. Therefore, it is of paramount importance to diagnose short-circuit faults at the generator terminal in the ship’s power system to ensure the safe and stable operation of modern ships. In this study, a generator terminal short-circuit fault diagnosis method is proposed based on a hybrid model that combines the Multi-Level Wavelet Decomposition Network, Deep-Gated Recurrent Neural Network, and Fully Convolutional Network. Firstly, the Multi-Level Wavelet Decomposition Network is used to decompose and denoise the collected electrical signals, thus dividing them into sub-signals and extracting their time-domain and frequency-domain features. Secondly, synthetic oversampling based on Gaussian random variables is employed to address the problem of imbalance between normal data and fault data, resulting in a balanced dataset. Finally, the dataset is fed into the hybrid model of the Deep-Gated Recurrent Neural Network and Fully Convolutional Network for feature extraction and classification of faults, ultimately outputting the fault diagnosis results. To validate the performance of the proposed method, simulations and comparative analysis with other algorithms are conducted on the fault diagnosis method. The proposed algorithm’s accuracy reaches 96.82%, precision reaches 97.35%, and the area under curve reaches 0.85, indicating accurate feature extraction and classification for identifying short-circuit faults at the generator terminals.

Numerical study on wave-induced drift forces and motions of a DTC ship in head and oblique waves using functional decomposition model

It is imperative to investigate the adequacy of propulsion power and steering mechanisms in order to maintain the manoeuvrability of ships in adverse wave conditions, as the drift forces caused by wave can result in deviation from the desired course. The primary objective of this research is to develop a hybrid approach, combining potential and viscous flows, known as SWENSE (Spectral Wave Explicit Navier-Stokes Equations), to accurately assess the wave-induced drift forces and motions experienced by ships in waves. SWENSE is a hybrid approach based on the functional decomposition model, in which the total field is composed of the incident field and complementary field. In this study, the incident filed waves are calculated by the Airy wave theory and the complementary field is solved by the SWENSE model. The wave conditions are selected according to the benchmark cases of the European Union research project SHOPERA (Energy Efficient Safe Ship Operation). The wave-induced loads and motions of DTC in head and oblique waves are calculated. Results of CFD (Computational Fluid Dynamics) are compared with those of EFD (Experimental Fluid Dynamics) and other numerical methods. In addition, the wave-induced drift forces of the fixed/3DOF (Degrees of Freedom) ships are compared with each other (3DOF includes heave, roll and pitch). SWENSE model is proven to be reliable for the predictions of the wave-induced drift forces and motions of ships in waves.

A quantitative study of the factors influencing human evacuation from ships

Due to the constraints of various factors influencing human evacuation on board, it remains a challenging problem to accurately quantify the impact of these factors on the evacuation process. To analyse the multiple influential factors of human evacuation from ships, a specific framework based on orthogonal experiments is proposed in this paper to comprehensively investigate the impact of multiple factors on the evacuation time and the efficiency of the evacuation process. Heeling angles, unavailable stairs, and priorities of evacuees are identified as influential factors according to the characteristics of human evacuation from ships. The analysis results show that the heeling angle has a very significant effect on both evacuation time and efficiencies, and the efficiencies decrease as the heeling angle increases. Unavailable stairs also have a significant effect on evacuation results, the magnitude of which depends on the number of stairs nearby. While the effect of priorities of evacuees on evacuation results is relatively less important, it can be found that priority evacuation of pedestrians with impaired mobility will aid to achieve optimal evacuation results. In conclusion, the findings of this study can help managers quickly develop effective evacuation strategies in emergencies to further improve the safe operation of passenger ships.

SEAFARER SELECTION FOR SUSTAINABLE SHIPPING: CASE STUDY FOR TURKEY

Sustainability and safety in the maritime sector mostly relies on seafarers for ensure the safe and secure operation of ships. Selection of personnel in the maritime sector is based on a large number of criteria, and is dictated by the seafarer’s qualification and the type of ship. The present study identifies 24 criteria in the form of personal, professional, physical, and technical competencies, categorized under four main headings, and calculates the weights of these criteria in terms of their importance. It goes on to present the general seafarer criteria and the different criteria required by different types of companies, and finally presents a model that can serve as a guide the in the selection of the best seafarer depending on the ship type. The study makes use of Step-Wise Weight Assessment Ratio Analysis and Additive Ratio Assessment methods, which are multi-criteria decision making methods.

A Decade of ECDIS: Analytical Review of the ECDIS Effect Towards the Safety of Maritime Shipping

The Electronic Charts Display Information System (ECDIS) on board ships is one of the latest amendments that have been stipulated by the International Maritime Organization (IMO) since 2008 and had been widely spread in 2012, and the main purpose of implementing the use of ECDIS was to use modern technology to help in operating ships to obtain a safe navigational watch and a safe approach and mooring in ports. Additionally, it facilitates voyage planning as an easy-to-use tool. Hence, ten years passed (2012-2022). The question arose, was the use of ECDIS considered an improvement to the safe operation of ships, or, on the contrary, it led to an increase in marine accidents? The authors initiated the study after the hypothesis that the ECDIS could be a major cause of marine accidents, and the authors found that the statistics in the hands of the researchers were not indicative of a conclusive opinion. Therefore, the researcher used the criterion of questionnaire as a means of quantitative statistics as a research tool to identify the opinion and vision of bridge seafarers for the use of ECDIS in a decade and to identify if any development is needed either in operational or educational sight. The methodology used in this research was the qualitative analysis data method through a questionnaire for different ECDIS users and indicated that the equipment carried an unprecedented positive effect on the safety of navigation. The questionnaire was based on 10 different questions. Yet, a great fraction agreed that there is a massive room for improvement in the areas of software, hardware, and external sensors to effectively contribute to an efficient Integrated Bridge System.

A Decade of ECDIS: Analytical Review of the ECDIS Effect towards the Safety of Maritime Shipping

The Electronic Charts Display Information System (ECDIS) on board ships is one of the latest amendments that have been stipulated by the International Maritime Organization (IMO) since 2008 and had been widely spread in 2012, and the main purpose of implementing the use of ECDIS was to use modern technology to help in operating ships to obtain a safe navigational watch and a safe approach and mooring in ports. Additionally, it facilitates voyage planning as an easy-to-use tool. Hence, ten years passed (2012-2022). The question arose, was the use of ECDIS considered an improvement to the safe operation of ships, or, on the contrary, it led to an increase in marine accidents? The authors initiated the study after the hypothesis that the ECDIS could be a major cause of marine accidents, and the authors found that the statistics in the hands of the researchers were not indicative of a conclusive opinion. Therefore, the researcher used the criterion of questionnaire as a means of quantitative statistics as a research tool to identify the opinion and vision of bridge seafarers for the use of ECDIS in a decade and to identify if any development is needed either in operational or educational sight. The methodology used in this research was the qualitative analysis data method through a questionnaire for different ECDIS users and indicated that the equipment carried an unprecedented positive effect on the safety of navigation. The questionnaire was based on 10 different questions. Yet, a great fraction agreed that there is a massive room for improvement in the areas of software, hardware, and external sensors to effectively contribute to an efficient Integrated Bridge System.

Integrated machine learning and probabilistic degradation approach for vessel electric motor prognostics

In the transition towards more sustainable ships, electric motors (EM) are being used in ship propulsion systems to reduce emissions and increase efficiency. The safe operation of ships is crucial, and prognostics and health management applications have emerged as effective solutions to transit towards monitored reliable systems. In this context, this paper presents a probabilistic EM prognostics model integrating data-driven operational models and physics-informed degradation models. Firstly, motor torque and winding temperature are estimated through connected machine learning models, which are based on operational and meteorological data. Operational and meteorological variables drive the EM degradation model and enable the analysis of EM degradation under different operational and environmental conditions. Subsequently, EM remaining useful life (RUL) is predicted within a probabilistic Monte-Carlo approach combining the thermal-stress model along with the associated uncertainties. The methodology is tested on a real case study of the OV Ryvingen vessel, with collected data during voyages along the Norwegian coast. Results confirm the validity of the designed RUL model showing that, under normal operation conditions, the degradation is mild, and the temperature measurement errors are important for RUL estimation.

Assessment of ship manoeuvring safety in waterway systems by relative navigational risk

The safety of vessels navigating in the sea waterway system is ensured by fulfilling the acceptable restrictions called safe ship operation conditions in that system. The assessment of navigation safety is particularly important when the conditions for safe operation of ships in the waterway system are changed concerns increasing the maximum parameters of vessels, increasing the allowable hydrometeorological conditions or changing the minimum tug assistance. The article presents a method for assessing navigation safety when the conditions for the safe operation of vessels in the waterway system get changed. The method uses two indicators, which are difference in navigation risks and relative navigation risk. To determine the navigational risk, algorithms were developed for calculating the probability of accidents caused by the deterioration of navigation conditions and technical failure of ship equipment and tugs. Another algorithm was developed for calculating the consequences of the accidents that involve blocking a waterway by a ship anchoring in an emergency, grounding, impact of the ship against a port structure or moored ship and a collision with another ship in motion. The method developed for assessing navigation safety by means of relative navigation risk can be used in practice when changing the conditions for safe operation of vessels in the waterway system and when the system is modernized. Navigational safety management is a decision process that is implemented in the loop presented in the article. The acceptable risk is determined on the basis of vessel traffic intensity and ship parameters defined by safe operation conditions for a given waterway system. Relative navigational risk may be used in assessment and comparison of various conditions of safe ship operation. The probability of an accident caused by ship's moving outside the available navigable area due to technical failures of ship equipment or tugs is determined, depending on the type of port waterway and the manoeuvres performed.

Элементы методологии анализа и синтеза операций и процедур по поддержанию безопасной эксплуатации судов в компаниях

The analysis of the model of the “ship - human element - environment” system based on the associative-structural approach is carried out and its operation in a stationary mode is shown, providing the required level of navigation safety with a constant logical operator of communication between system-forming factors. Minimizing dangerous phase transitions in the “ship - human element - environment” system has been proved possible by purposefully using the allocated resource and conducting multiparametric control of operations with a minimum of information necessary for equipment diagnostics and instructing the ship’s crew. The research results of developing the scenarios of ship operations and procedures of managing the condition of the vessel, creating the elements of the theory of the vessel safe operation in non-standard and emergency situations in conditions of phase transitions of the states of the structure-forming factors of the system are presented. Elements of the methodology for analyzing and synthesizing scenarios of operations and procedures for managing the state of safe operation of the vessel in steady-state mode within the framework of a program-target approach in the form of logical programs have been developed. The description of the algorithm for updating scenarios of operations and procedures for managing the state of safety of the vessel in special conditions of navigation and in emergency situations is given. The developed directions for improving the control over safe operation of ships by means of multi-criteria optimization of the production and navigation process and by drawing up scenarios and management procedures help reduce the accidents on ships in the transport, oil and gas and fishing industries of the Russian Federation.

Investigation on performance of a marine centrifugal pump with broken impeller

As an important auxiliary equipment for ships, the stable operation of centrifugal pumps has a significant impact on the safe operation of ships, so monitoring the operation of marine centrifugal pumps is particularly urgent. In this paper, a marine centrifugal pump is studied for four cases: the normal state, the initial stages of broken state, the intermediate stages of broken state, and the late stages of broken state. The Delayed Detached Eddy Simulation (DDES) with a nonlinear eddy viscosity model is used for the nonstationary calculation of the whole channel, aiming to study the performance of the centrifugal pump in the broken state. A comprehensive analysis of the hydrodynamic characteristics of the centrifugal pump, such as external characteristics, flow situation, pressure pulsation, and flow analysis based on the proper orthogonal decomposition (POD) method, was carried out. Taken together, these results suggest that as the number of broken blades increases, the corresponding head and efficiency gradually decrease. Blade loss mainly affects the uniformity and stability of the flow field, so that the centrifugal pump performance loss increases, which in turn causes the centrifugal pump head and efficiency to decline. It also leads to an increase in radial force during operation, which in turn causes an increase in the amplitude of pump vibration. The results of the study provide some references for the fault diagnosis of centrifugal pumps.

1/42.0 KCS 모형선의 조종성능에 관한 연구

The emergence of new concept ships, such as autonomous ships, has drawn much attention on the manoeuvrability of ships because of the safe navigation and operation of ships. Although the manoeuvrability of KRISO Container Ship(KCS) has been frequently reported, there have been few documents of representative manoeuvre cases conducted in various methods by one institute. This paper presents the manoeuvrability of the ship in 1/42.0 model scale by 3 methods: free running model tests, horizontal planar motion mechanism tests, and computational fluid dynamics analysis. KRISO reports KCS manoeuvre data: 35° turning circle tests and 20/20(10/10) zigzag manoeuvring tests. In addition, a simple formula for integrating and comparing manoeuvre indices, Manoeuvrability Comparing Simple Index(MCSI), is proposed.

A quantitative effectiveness analysis to improve the safety management system (SMS) implementation on-board ship

The International Safety Management (ISM) Code seeks to provide safety standards for the safe management and operation of ships. The code stipulates implementing a safety management system (SMS) on-board ship. The SMS requires the implementation of numerous procedures and forms to improve safety at the operational level on-board ship. The SMS effectiveness is vital for sustainable safety management system implementation. This paper aims to perform a comprehensive effectiveness analysis of ISM Code implementation, including forms and procedures, on-board ship to enhance the safety management system (SMS) implementation. To accomplish this, a best-worst method (BWM) is used under a fuzzy logic environment. Whilst the fuzzy BWM has yet to be applied in maritime transportation; it provides a robust analysis approach. The proposed method is improved by adopting the impact level of expert judgments in the aggregation stage of the methodology as well as performing consistency analysis. Besides its robust theoretical insight, the outcomes of the paper provide the utmost contribution to ship management companies and safety professionals for continuous improvement and monitoring of their safety management systems implementation.

연안여객선 안전공영제 도입을 위한 정책적 제언

After the Sewol Ferry disaster, various physical and human regulatory framework such as revision of related laws and regulations and innovation of operation manager system have been strengthened and financial support system were prepared to improve the safety of coastal passenger ships. However, despite many of these institutional improvements and financial support decisions, the safe operation of coastal passenger ships is not guaranteed. This study was carried out to find one promising way to ensure the safe operation of coastal passenger ships. As a result of the study, it was concluded that “there is a need for the introduction of Safety Public Service System of Coastal Passenger Ships.” The Safety Public Service System proposed in this study is a system in which the government bears or supports some or all of the costs in order to ‘promote the safety of the people’ and ‘promote the people’s right to move’ using coastal passenger ships. Thus, it is thought that there is a need to enact a separate special law for the Safety Public Service System. The reason for this is first, where relevant individual laws and regulations are revised little by little to make the legal base, there could be a great possibility that the legislative purpose would not clearly come out and it would not work properly in reality. Therefore the process of clearly declaring the legislative purpose and the purpose of the ‘Safety Public Service System’ through enacting a special law is necessary.Second, there are many concepts needing an accurate definition thereof in the ‘Safety Public Service System’. Concepts such as 'safety', 'safety public service system', 'safety cost', etc. can be sociologically explained, but legally, these are terms requiring precise definition. Therefore, unless relevant terminologies are separately arranged in the existing Marine Transportation Act and Harbor Act, etc., when they suddenly appear in individual articles, there is a great risk that they may not be properly interpreted or narrowly reduced in the enforcement decree or ordinance. In particular, in the case of items accompanying the budget, and the scope of the subject is not clearly defined in the law, it is highly likely to become meaningless concept in reality. Thus, it is necessary to clarify the definition of the concept in a separate special law. Third, in the extension of the recent discussion on constitutional amendments, which emphasized the state's constitutional obligations to ensure individuals' right to safety, the National Assembly and the government, which are components of the state, should clearly declare their willingness to ensure safety of the people internally and externally. Furthermore, from the point of view of making it clear that the State is faithfully fulfilling its responsibility for a safe society, it is thought that enacting a special law for the introduction of the ‘Safety Public Service System’ of coastal passenger ships rather than revising individual laws is a more reasonable way. The budget required to implement this system is approximately KRW 24.1 billion per year. By creating the Safety Public Service System it is worth implementing and enforcing in the viewpoint of a single large-scale coastal passenger ship disaster can be prevented. Today, securing the people's right to safety is recognized as a role that should be given the highest priority among the national responsibilities. Therefore, it is thought that the introduction of the Safety Public Service System to promote the safe operation of coastal passenger ships and the national financial support required for its implementation are meaningful in terms of fulfilling the national responsibility for the Sewol Ferry disaster.