• Journal of Navigation and Port Research
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• v.29 no.3 s.99
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• pp.235-244
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• 2005

A new type qf demonstrations in the temporal and spacial aspects, such as accidental and unprepared demonstration, urgent assembly, demonstration-on-sea, demonstration-on-highway, and etc., which are not intended in the Law of Assembly and Demonstration, are becoming a social problem Especially, the law on demonstration-on-sea needs to be discussed further because it is not clear if the Law of Assembly and Demonstration is applicable here. If so, how can it be explained logically? Or, if not so, which law should be applied to this context? So far, various theories on demonstration-on-sea have been opposed aggressively vs. submissively. However, it should be guaranteed that the demonstration on sea is one of the constitutional rights based on the self-decision right of demonstration's place. Accordingly, these contents have to be interpreted with a concept of demonstration in Demonstration's law in coordination with the Constitution. Therefore, it is not persuasive that Demonstration's law is analogized, or general police law is applied, to such untypical demonstrations. In addition, taking into consideration a demonstrative function for minority under modem situation of demonstration, it is right to apply the Law of Assembly and Demonstration to the demonstration-upon-sea directly.

• Journal of Navigation and Port Research
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• v.39 no.3
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• pp.149-156
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• 2015

The Dynamic Positioning System consists of 7 elements which are namely Power system, Human machine interface, DP Computer, Position Reference System(PRS), Sensors, Thruster system and DP Operator. Incidents like loss of position(LOP) on DP vessel usually occur due to errors in these 7 elements. The purpose of this study is to find out safety operation method of DP vessel through qualitative and quantitative analyze of DP LOP incidents which are submitted to IMCA every year. The 612 DP LOP incidents submitted from 2001 to 2010 were analyzed to find out the main cause of the incidents and its rate among other causes. Consequently, the highest rate of incidents involving DP elements are PRS errors. DP computer, Power system, Human error and thruster system came next. The PRS has been analyzed and a flowchart was drawn through expert brainstorming. Also, the conditional probability has been analyzed through Bayesian Networks based on this flowchart. Consequentially, the main causes of drive off incidents were DGPS, microwave radar and HPR. Also, this study identified the main causes of DGPS errors through Bayesian Networks. These causes are signal blocked, electric components failure, relative mode error, signal weak or fail.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2016.05a
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• pp.100-102
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• 2016

Every crew are in great peril that they should put out a fire on board in person due to a property of ship isolated. Accordingly, it is essential to verify whether the fire-fighter's outfits and fire-fighting scenarios in accordance with present regulations are safe and effective actually. As a result of comparison between shore fire-fighter's outfits and fire-fighting scenarios and those on ship and statistics calculation of the place and frequency of the fire of actual ship, present limitations of fire suppression system and fire-fighter's outfits were proved. In addition, derive the distance to the place on ship that has highest frequency of fire occurrence from examining actual ship's drawings according to their description and size. Finally from experiments in more experimental groups by changing numbers of actual fire-fighters and environment and conduction of survey of a number of crew in active service on ship, the most effective fire-fighter's outfits system and fire-fighting scenarios will be derived.

• Journal of Navigation and Port Research
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• v.29 no.6 s.102
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• pp.537-545
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• 2005

Traditionally Jeju island has a mild oceanic climate throughout the year and famous as worldwide resort area bemuse of its pure natural environment and dramatic coastal scenery. But unpredicted coastal erosion problem, mused by variation of environmental conditions from construction of coastal structure and renovation of the existing ports, has raised its head above the water, and is becoming serious these days just like other coastal area in Korea. The phenomena happen here along the seaside of southern part of the island show that severe changes in coastal line from erosion and even witnessed the coastal cliff failure. In advanced countries, coastal engineers and researchers have studied deeply about this kind of problem for a long time. However, as it is not sot active in Korea and lack of research data, there exists difficulties on building protection methods and thoughtless constructions might make it more complicated and fatal to the coastal environment. In this study, we investigated some case studies of other countries and intended to induce and propose some integral protection methods for coastline erosion, considering environmentally sound and water friendly way of development such as artificial reef, floating breakwater, and double cellblock breakwater. Finally, we made analysis on the proposed methods with numerical model test and evaluation on the feasibility of each method.

• Journal of Navigation and Port Research
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• v.43 no.6
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• pp.475-482
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• 2019

The increase in human use and activity in the oceans is leading to marine pollution and habitat destruction. As a result, in particular, marine animals with a long life cycle and small population are threatened with extinction. Thus, the Korean government designated 11 artificial habitats, such as aquariums and marine museums, as Ex-situ conservation institutions to preserve endangered marine life in 2010. However, studies on the significance and economic value of Ex-situ conservation institutions providing marine life conservation services have not been conducted. Thus, the purpose of this study was to estimate the public's quantitative support for the operation policy of Ex-situ conservation institutions, which is a management method for the protection and propagation of marine animals in Korea. To achieve this, the economic value of the marine animal conservation role of the National Maritime Museum was estimated, operated as an Ex-situ conservation institution for the preservation of green turtles in Korea. By using the representative non-market valuation method for public goods known as the contingent valuation method (CVM), the economic value of the Ex-situ conservation institution (National Maritime Museum) was estimated at approximately 41.8 billion won to a maximum of 78.1 billion won. The results of this study can be applied as basic data for marine animal management policymakers in establishing efficient management plans for endangered marine animals in Korea's coastal waters.

• Journal of Navigation and Port Research
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• v.43 no.6
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• pp.384-394
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• 2019

This study investigated the current status of the management system for foreign seafarers boarding Korean ocean-going vessels and analyzed the problems and suggested measures for improvement through the survey of shipping companies, ship management companies, crew manning companies and related associations. The conclusion is summarized as follow. First, it is necessary to reorganize and apply the collective agreements or the laws applicable to the foreign seafarer separately in regard to the foreign seafarer related laws and collective agreements applied in the same way as the Korean seafarer. Second, it is necessary to change the decision-making to shipowner in deciding on the number of foreign seafarers employed by the Korean ocean-going vessels or if the decision-maker remains the same, the relevant laws must be clearly defined pertinent to the decision-maker. Additionally, the number of foreign seafarers should be applied for each position and ship's type. The third is to expand the recognition arrangement for certificate of ships' officers to Eastern Europe and Asian countries to expand the range of options for hiring foreign seafarers. The fourth is to prevent the waste of administrative manpower by simplifying complicated and unnecessary administrative procedures from hiring and boarding of foreign seafarers. The fifth is to establish a systematic training and education system for foreign seafarers in cooperation with related shipping companies and government authorities, associations and so on. This study will contribute to providing a more efficient and systematic management of foreign seafarers boarding Korean ocean-going vessels.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.29 no.1
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• pp.11-19
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• 2005

Traditionally Jeju island has a mild oceanic climate throughout the year and famous as worldwide resort area bacause of its pure natural environment and dramatic coastal scenery. But unpredicted coastal erosion problem, caused by variation of environmental conditions from construction of coastal structure and renovation of the existing ports, has raised its head above the water, and is becoming serious these days just like other coastal area in Korea. The phenomena happen here along the seaside of southern part of the island show that severe changes in coastal line from erosion and even witnessed the coastal cliff failure. In advanced countries, coastal engineers and researchers have studied deeply about this kind of problem for a long time. However, as it is not sot active in Korea and lack of research data, there exists difficulties on building protection methods and thoughtless constructions might make it more complicated and fatal to the coastal environment. In this study, we investigated some case studies of other countries and intended to induce and propose some integral protection methods for coastline erosion, considering environmentally sound and water friendly way of developement such as artificial reef, floating breakwater, and double cellblock breakwater. Finally, we made analysis on the proposed methods with numerical model test and evaluation on the feasibility of each method.

• Journal of Navigation and Port Research
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• v.42 no.3
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• pp.237-244
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• 2018

When underwater rubble leveling work is carried out by a robot, real-time information on the topography around the robot is required for remote control. If the topographical information with respect to the current position of the robot is displayed as a 3D graphic image, it allows the operator to plan the working schedules and to avoid accidents like rollovers. Up until now, the topographical recognition was conducted by multi-beam sonars, which were only used to assess the quality before and after the work and could not be used to provide real-time information for remote control. This research measures the force delivered to the bucket which presses the mound to determine whether contact is made or not, and the contact position is calculated by reading the cylinder length. A variable bang-bang control algorithm is applied to control the heavy robot arms for the positioning of the bucket. The proposed method allows operators to easily recognize the terrain and intuitively plan the working schedules by showing relatively 3-D gratifications with respect to the robot body. In addition, the operating patterns of a skilled operator are programmed for raking, pushing, moving, and measuring so that they are automatically applied to the underwater rubble leveling work of the robot.

• Journal of the Korean Society of Marine Environment & Safety
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• v.11 no.2 s.23
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• pp.33-40
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• 2005

According to the development of technology of the navigational equipments, many bridge equipments have been improved, however, marine accidents by human error have not been reduced. Therefore, a matter of primary concern is focused on whether bridge equipments of ships are ergonomically arranged to reduce errors due to human factors. As part of a design of IBS(Integrated Bridge System) standard, rules of the conning display to save time and additional movements to obtain important informations of a ship should be established as soon as possible. In the present study, ergonomic design factors for the conning display are studied through the survey of related works, heuristic evaluations, sketch method tests as well as questionnaires. Using these factors, new conning display was designed and the ergonomic indices were evaluated by comparing tests of the existing conning displays. It is found that the designed conning display obtained high ergonomic index showed better performance, therefore, the ergonomic index studied in the present paper can be used as a useful design standard in the conning display design procedures.

• Journal of Navigation and Port Research
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• v.29 no.1 s.97
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• pp.43-58
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• 2005

Piracy is the enemy of the human race. Pirates commit acts of murder, robbery, plunder or other villainous deeds at sea, cruelly against humanity. The Republic of Korea(ROK), as a big maritime country, is obliged to suppress piracy under international treaties it ratified, including the UN Convention on the Law of the Sea and the two 1988 Conventions against maritime terrorism The Korean government is recently taking a positive attitude towards the regional cooperation which is necessary for the suppression of piracy in the waters of Southeast Asia In spite of the effects of international cooperation to prevent piracy, it is recently on an increasing trend every year. Such circumstances may have a bad effect on the sound development of world economy by means of trade at sea as well as treat to the safety of crews and safe operation of ships. This paper aims to suggest the countermeasures against piracy in terms of criminal law, civil law and international law in order to secure safe operation of vessels at sea.