• 한국해양환경ㆍ에너지학회지
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• 제5권1호
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• pp.30-37
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• 2002

최근 연안의 해양오염 증가로 인하여 매년 발생되는 적조현상 등이 연안 생태계에 영향을 많이 끼치는 문제점으로 되고 있다. 해양오염 요인 중에 어선에서 발생되는 선저폐수나 폐윤활유의 무단 배출은 큰 비중을 차지하고 있으므로 효율적인 관리방법을 찾아야 한다. 이런 문제점을 해결하기 위한 방안으로 선저폐수처리장치를 어항별로 설치하여 소형 어선에서 발생되는 선저폐수와 폐윤활유를 육상으로 이송ㆍ처리하여 해양으로의 무단 배출을 막아야 한다. 그에 대한 선결연구과제로 어선에서 발생되는 선저폐수와 폐윤활유 발생량 추정에 관한 연구의 필요성이 대두된다. 본 연구의 주요내용은 톤급별 어선에서 발생되는 선저폐수와 폐윤활유 현황 조사 및 고찰과 선저폐수와 폐윤활유 발생량에 영향을 주는 파라미터 도출을 통한 발생량 모델링과 이를 이용한 샘플어장에 대한 선저폐수와 폐윤활유 발생량 추정을 포함하고 있다.

• Fisheries and Aquatic Sciences
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• 제27권4호
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• pp.256-264
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• 2024

Small pelagic fish populations have long been exploited by various fishing gears in the Natuna Sea, and since the 1970s, purse seine exploitation has expanded to offshore fishing grounds. Various small pelagic fish species are exploited from these waters including spotted sardinella (Amblygaster sirm). This research was conducted for 22 months, from March 2019 to December 2020. The fish sample was taken from the purse seine fleet's catch in the fisheries management area (FMA) 711 Natuna Sea and Karimata Strait, which was brought to Pemangkat fishing port in the West Kalimantan Province, Indonesia. This paper aims to determine the exploitation status of spotted sardinella in the Natuna Sea as a recommendation material for management policies. The methods used in this analysis are estimated age, cohort, population parameters, and spawning potential ratio of spotted sardinella. The results show three primary cohorts of spotted sardinella in the Natuna Sea, with ages ranging from 9 months to 3.1 years and a maximum attainable age (longevity) of 4.3 years. The asymptotic value (L_∞) is 21.79 cmFL in length, with a growth rate (K) of 0.65 per year. The natural mortality rate (M) was 1.19, the total mortality rate (Z) was 2.19, and the fishing mortality rate (F) was 0.99. The exploitation rate (E) was 0.45 and the stock status was still in a sustainable condition. Therefore, the sardinella fisheries can be developed using a precautionary approach and focus on the ecosystem sustainability of FMA 711.

• 한국항만학회지
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• 제11권2호
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• pp.321-337
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• 1997

Rapid change in the technological environment of marine transportation and the development of the ocean shipping industry have fostered a revolution in the port system. This in turn has caused major changes in the function and use of port in Korea. Aside from this. Mokpo Port, however continues to decline, because the existing port facilities and related subsystem are already obsolete with no chance of regaining operational effectiveness and treatment for proper implementation. Although a few studies have been done on the Mokpo Port, has not been found, any reseach for the analytical approach to the transportation system of it. This paper aims to make an extensive analysis of the physical distribution system in Mokpo Port focusing on the coordination of subsystems such as navigational aids system, quay handling and transfer system, storage system and inland transport system. The base of introduced simulation tool here is the queueing theory. The overall findings are as follows; 1. Among those vessels called at Mokpo Port in 1994, the average size of oceangoing vessels is 4,922.1 G/T, and the domestic is 317.8 G/T. The average arrival interval and service time of the domestic vessels are 6.0 hours and 24.1 hours respectively marking the berth occupation rate over 100%. Those for oceangoing vessels are 34.5 hours, 120.0 hours and 37.2%. In order to maintainin the berth occupation rate to 70% the capacity considering the 1994 of domestic piers must be extended to 145% and oceangoing vessels must be increased to 165% year called. 2. The capacity of approaching channel is enough to handle the total traffic volume. 3. Tugs are sufficiently being provided to handle all ships requiring their services 4. The capacity of storage and inland transportation systems are sufficient to handle the throughput and the yard stroage utilization rate of No.1 $\cdots$ No.5 is 4.5% and No.6 1S 30% of 1993's. 5. The utilization rate of LLc(Level Looping Crane) and PNT(PNeumaTic) are 2.7% and 18.8%, respectively. Practical solution and proposal for improvement of Transportation System in Mokpo Port are as follows; 1. To avoid the congestion in domestic pier introduction of a new port operation system is necessary allowing the domestic vessel to use the oceangoing pier. 2. To establish the port management information system to improve the efficiency of port operation. 3. To build a new storage system for high valued cargos including modernization of the present storage and handling system. 4. To insure the safety of navigation in approaching channel, The Vessel Traffic System including separation scheme is introduced. 5. To interest enormously on public relation to ship owner's association, shippers and consignees by showing that they can save cost and ship turnaround time in order to promote the call to Mokpo Port. At last, to be strategically change the function of Mokpo Port to the Leisure, Fishing & Ferry as well as Maritime port.

• 한국해양공학회지
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• 제16권1호
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• pp.22-26
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• 2002

In this paper, a finite element method is applied to the numerical calculation of the harbor calmness. The mild stop equation as the basic equation is used. The key of this model is that the bottom friction and boundary absorption are imposed. A numerical result is presented and compared with the results obtained from the other numerical analysis. These results are in very well agreement. This method calculating the calmness can be broadly utilized making the new design of harbor and fishing port in the future.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2010년도 춘계학술대회
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• pp.189-190
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• 2010

바다낚시를 여가활동으로 즐기는 사람들의 수가 증가하고 있지만 해수면 낚시용 수상구조물에 대한 규정이 없어 많은 안전사고를 야기하고 있다. 본 연구에서는 해수면의 환경특성과 낚시특성을 파악하여 해수면에서 플로팅 구조물크기설정, 구조물 구조계획, 상부공간계획, 안전시설계획의 4가지 계획단계를 통해 6인용과 12인용 두 가지 타입의 해수면 낚시용 수상구조물 표준모델을 제시하고자한다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2012년도 춘계학술대회
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• pp.50-51
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• 2012

해안 및 도서지역의 전력수요를 파력, 조력, 조류, 해상풍력과 같은 해양발전 시스템을 이용하는 혁신적인 고효율 하이브리드 알고리즘과 기본 모듈을 개발하기 위하여 2011년 8월부터 2012년 2월까지 남해안 도서지역 중 1개 섬을 선택하여 섬에 거주하고 있는 주민의 가구에 전력량 측정기를 설치하여 소비전력량 패턴을 확인하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2014년도 춘계학술대회
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• pp.323-325
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• 2014

전체 충돌사고 중 어선과 관련된 충돌사고가 약 80퍼센트를 차지하고 있다. 어선사고의 잠재적 위험요소를 찾기 위해 본 연구에서는 완도 VTS 관제구역 내 통항하는 어선의 항해특성 및 패턴을 분석함으로써 어선 비어선간 발생할 수 있는 충돌사고의 위험해역 및 Near Collision을 분석하고자 한다. 이 결과를 바탕으로 관제사의 의사결정을 지원함으로써 해상교통관제서비스 향상과 해양 사고 예방에 기여하고자 한다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 1995년도 춘계학술발표회 논문집
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• pp.65-92
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• 1995

The final aim of our research project is a study on assessment of automatic steering system of ships in open seas. In order to achieve this aim we need to know the characteristics of each component of the system and also to know the characteristics of disturbance to ship dynamcis. In this paper we provide calculation method of irregular disturbance to ships in autopilot navigation in open seas and also show calculation examples about two kinds of ship ore carrier and fishing boat. The disturbance consists of irregular wave and random wind, The disturbance is calculated as equivalent yaw angular velocity. Each spectrum and time history of disturbance are reasonably evaluated. Further investigation concerning to performance index of autopilot system and energy loss related to automatic course keeping will be dealt with in another paper,

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 1995년도 VTS and IBS 95 The Korean Institute of Navigation 1995년도
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• pp.153-165
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• 1995

When an automatic course-keeping is introduced as is quite popular in modern navigation the closed-loop steering system consists of autopilot device power unit(or telemotor unit) steering gear ship dynamics and magnetic or gyro compass. We derive the mathematical model of each element of the automatic steering system. We provide a method of theoretical analysis on propulsive energy loss related to automatic steering of ships inthe open seas taking account of the on-off mechanism of power unit. Also we paid attention to dead band mechanism of autopilot device which is normally called weather adjustment. Next we make numerical calculation of the effects of autopilot control constants ont he propulsive energy loss for two kinds of ship a fishing boat and an ore carrier. Realistic sea and wind disturbances are employed in the calculation.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 International Symposium on GPS/GNSS Vol.2
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• pp.335-338
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• 2006

This report introduces a National Vessel Monitoring System(NVMS) within the General Information Center On Maritime Safety and Security(GICOMS) project and a national legislation system for ship's safety management in Korea. We also represent future directions of NVMS in terms of E-Navigation(E-Nav), which is the new study item for COMSAR and NAV that has been adopted from the Maritime Safety Committee(MSC) 81st session. It concludes the future E-Nav system, when it is built, that all functions of NVMS should be used by NVMS controllers as well as mariners, and we should also consider the existing NVMS infrastructure including S/W and H/W.