• 해양환경안전학회지
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• 제30권2호
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• pp.209-216
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• 2024

연안여객선 현대화계획에 따라 건조된 카페리여객선이 제주항 입항 시 다른 선박과 충돌 또는 부두와 접촉한 사고가 2020~2022년 사이에 4건 발생하였다. 사고는 주로 예선 없이 선수 및 선미 스러스터를 이용한 자력도선 중 조선 부주의와 바람에 의한 선박의 압류로 발생하였다. 이에 본 연구에서는 카페리여객선 H호를 중심으로 충돌사고를 분석하고, 선박이 접안 중 발생하는 외력과 모멘트에 따라 선박이 예선 없이 자력으로 부두와 평행하게 접안하기 위한 스러스터 및 엔진의 소요출력을 기반으로 자력으로 선박을 제어할 수 없는 한계풍속과 풍속 증가에 따른 추가적인 예선의 운영방안을 제시하였다. H호의 적재상태, 접안속도에 따른 자력 또는 예선 사용 시 한계풍속을 상대풍향별로 분석한 결과, 제주항 접·이안 시 횡방향 풍속이 10m/s 이상일 때 예선 1척을 선미에 사용하고, 횡방향 풍속이 14m/s 이상일 때에는 예선 2척을 사용 것이 타당할 것으로 판단된다.

• 한국시뮬레이션학회논문지
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• 제11권4호
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• pp.81-89
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• 2002

Several full mission simulators have been installed since about 10 years ago in Korea. The newly established Marine Simulation Training and Research Center at Korea Maritime University has played a key role for education and training of both cadets and in-service officers trainees, and for research on Korea ports such as Jeju international cruise port, Ulsan SBM and Kwangyang container port and many others. This study mainly focuses maritime education and training on the ship handling simulation and the bridge resource management conducted by Korea Maritime University.

• 토지주택연구
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• 제8권4호
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• pp.285-294
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• 2017

Recently, as the paradigm of regional development has been transformed into characterization, decentralization and cooperation, small and medium scale development is in the spotlight. In particular, as the transfer of planning authority to local governments accelerates, LH is in the process of seeking to transform itself into a system that is in line with local government demand. The purpose of this study is to elaborate the regional pending projects that meet the demand of the region. The Jeju Special Self-Governing Province is the area where land and housing prices have increased more than three times recently, which is the area of interest in recent years due to the various demand for development projects. Another objective is to establish a local government based on LH's system, it is aimed to derive a collaboration method with local government, province corporation and local researchers. The criteria for deriving the cooperation projects between the local government and LH are basically the ones that can be carried out by LH and future-oriented projects. The process of deriving has undergone the process of statutory planning, unscrupulous plan analysis, and consultation of experts' advisory committees. In order to derive the regional cooperation project, four criteria such as local uniqueness, future possibility, business promotion efficiency, and local cooperation project were set. Major projects of the Jeju Special Self-Governing Province are improvement of the surrounding traffic system, construction of the hinterland due to the construction of the second airport, and establishment of Cruise Port(Jeju Port, Seogwipo Port). The role of each entity in the implementation of regional cooperation projects is as follows. Local government should request subsidies for the projects in case of lack of budget support and secure them through competition with other regions. In addition, it should be responsible for the operation and management of the facility once it has been supported and completed smoothly. The Ministry of Land, Infrastructure and Transport affects each region through approval and subsidy of the development plan. After the development project is completed, it evaluates the development project through monitoring and plays a role of continuously improving the system. As a business operator, the provincial corporation will carry out small-scale projects including non-physical projects such as community participation. In the case of LH regional headquarters, the general manager of the region will establish a comprehensive business plan, secure development availability, and carry out large-scale growth promotion projects.

• 한국항해학회지
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• 제10권2호
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• pp.31-55
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• 1986

Generally, the development of shipping is characterized by the amount of traffic flow (traffic volume) and seaborne cargo in the sea. Movement of ships is an essential element of constructing the traffic flow which is represented the dynamic movement of ships in the sea, but on the other band the numbers of arriving and departing the port is the basic factor consisting of the static movement of ships. The amount of cargoes by coastal vessels and ocean trade vessels have increased tremendously with the great growth of the Korean economy these days. This increase of the seaborne cargoes has made the Korean coastal traffic flow so congested that this can be a cause of large pollution as well as great marine casualities such as a loss of human lives and properties . And also the future coastal traffic is expected to increase considerably according to our economic development and high dependence upon foreign trade. Under the circumstance, to devise the safety of coastal traffic flow and to take a proper step of a efficient navigation, there is a necessity for analyzing and surveying the coastal traffic trend and the characteristics of cargo movement. In order to grasp the dynamic movement of ships in the Korean coast, O/D analysis is executed. This paper aims to secure the basic data necessary for a comprehensive plan and estimation of vessel traffic management system for the enhancement of safety, order and efficiency of vessel traffic in the Korean coast. The analyzed results of the traffic flow and seaborne cargoes of the Korean coast are summarized as follows : 1) The congestion by the vessels occurred around the ports such as-in proportion of ship's number (proportion of tonnage) -Incheon 18.5%(14.8%), Pohang 5.9% (9.9%), Samil 5.2%(8.3%), Mokpo 8.6%(0.8%), Pusan 13.5%(36.4%), Ulsan 9.1%(16.2%). 2) It is found that the area adjacent to Incheon, Pusan, Ulsan, Channel of Hanryu and South-western area are heavily congested. 3) It is confirmed thatthe area adjacent to Incheon, Pusan, Ulsan, Channel of Hanryu and South-western area are heavily congested. 3) It is confirmed that the coastal vessels are main elements constituting the coastal traffic and that there are much traffic flow among five ports as following through the precise O/D analysis of ship's coastal movement. Incheon-Samil, Ulsan, Pusan, Jeju Pusan -Samil, Ulsan, Incheon, Jeju Pohang -Samil, Inchoen, Jeju Pohang -Samil, Incheon, Jeju Ulsan -Samil, Incheon, Jeju Samil -Ulsan, Pusan, Incheon 4) The amount of cargoes to abroad are in proportion about 81% of total and the amount of coastal cargoes are about 19%. Of those, cargoes in and out to Japan are about 26% and to South-east Asia are about 27%. 5) The chief items of foreign cargoes are oil(38.33%), iron ore(13.98%), bituminoous coal(12.74%), grain(8.02%), lumber(6.45%) in the import cargoes and steel material(21.96%), cement(17.16%), oil(6.81%), fertilizer(3.80%) in the export cargoes. 6) The 80.5% of total export cargoes and 92.4% of total import cargoes are flowed in five main ports. 7) The chief items of coastal cargoes are oil (42.45%), cement(16.86%), steel material (6.49%), anthracite(6.31%), mineral product(4.3%), grain, and fertilizer. Almost 92.24% of total import and export oil cargoes in Korea is loaded and unloaded at the port of Samil & Ulsan.

• 수산해양기술연구
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• 제57권4호
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• pp.334-341
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• 2021

The fishery compensation by marine spatial planning such as routeing of ships and offshore wind farms is required objective data on whether fishing vessels are engaged in a target area. There has still been no research that calculated the number of fishing operation days scientifically. This study proposes a novel method for calculating the number of fishing operation days using the fishing trajectory data when investigating fishery compensation in marine spatial planning areas. It was calculated by multiplying the average reporting interval of trajectory data, the number of collected data, the status weighting factor, and the weighting factor for fishery compensation according to the location of each fishing vessel. In particular, the number of fishing operation days for the compensation of driftnet fishery was considered the daily average number of large vessels from the port and the fishery loss hours for avoiding collisions with them. The target area for applying the proposed method is the routeing area of ships of Jeju outer port. The yearly average fishing operation days were calculated from three years of data from 2017 to 2019. As a result of the study, the yearly average fishing operation days for the compensation of each fishing village fraternity varied from 0.0 to 39.0 days. The proposed method can be used for fishery compensation as an objective indicator in various marine spatial planning areas.

• 한국항해항만학회지
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• 제29권4호
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• pp.327-333
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• 2005

Sea level (MSL, MHWL, or MLWL) change has been main concern to scientists and engineers and it can be primarily due to both change of climate and vertical movement of land. This paper reports the intensive analysis of the sea level changes and broad discussion of the future at the southwestern coast of Korean peninsula. Regression analysis was conducted to investigate general tendency and periodicity of the sea levels at the six different study sites such as Gunsan-I(inner port), Gunsan-O(outer port), Mokpo, Yeosu, Heuksan and Jeju and the results were compared with global values. Besides the changes of sea levels due to global warming, the influence of the man-made structure such as seadike and seawall was attempted to quantify using the minimization of the Root Mean Square(RMS) error. The results show that it is a general tendency that the values of mean sea level rise at the southwestern coast of Korean Peninsula, especially at Gunsan-I and Jeju, are somewhat larger compared to global average values. There is also some evidence that tidal amplifications are found just after construction of man-made structure at Gunsan-I and Mokpo. However, both sites show different mechanism in relation to tidal choking, tidal flat and river discharge. The impact due to construction of man-made structure is considerably larger at Mokpo site, while the impacts due to man-made structure and the effect of sea level rise are relatively identical at Gunsan-I site. This study is expected to provide some intuition to future design.

• 한국항행학회논문지
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• 제26권5호
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• pp.261-271
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• 2022

본 논문은 지상파 DTV (Digital TV) 방송 대역을 대상으로 서해상에서 활용 가능한 새로운 주파수 자원에 대한 연구이다. 우리나라 서해의 인천-제주도 해상 구간을 중심으로 DTV 방송 신호 (채널 14 51번, 470 698 MHz)의 TVWS (TV White Space) 주파수 이용 가능성을 연구하였다. 분석 결과 채널 19번(503 MHz), 채널 37번(611 MHz), 채널 39번(623 MHz) 3개 채널은 인천항-제주항 구간 및 인근 모든 바다에서 DTV와 혼신 없이 TVWS 가용 채널로 활용 할 수 있는 것으로 파악 되었다. 반면 채널 23번(527 MHz), 채널 33번(587 MHz) 2개 채널은 인천항-제주항 구간 전체에서 DTV 신호가 강한 것으로 분석되어 서해안에서 TVWS 가용 주파수로 활용이 어려운 것으로 분석되었다.

• 한국지반공학회논문집
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• 제31권7호
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• pp.41-52
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• 2015

제주도 화산암은 여러 환경적인 요인으로 인하여 크기와 분포가 다양한 기공이 많은 다공성 구조를 보이고 있으며, 지질학적 그리고 역학적 특성 또한 지역마다 차이를 나타내고 있다. 뿐만 아니라, 제주도의 기반암은 여러 차례의 화산활동으로 인해 현무암층 사이에 연약층인 화산쇄설물 및 공동이 불규칙하게 발달된 층상구조로 이루어져 있다. 본 연구에서는 제주도 북서부 육 해상에서 채취한 현무암 암석에 대하여 다양한 물성 시험 및 일축압축강도 시험을 수행하고, 그 결과를 제주도 남동부 해상에서 채취한 현무암 암석의 물리적, 역학적 특성과 비교 분석하였다. 그 결과 제주도 북서부 육 해상에서 채취한 현무암 암석의 물리, 역학적 특성은 제주도 남동부 해상에서 채취한 현무암 암석과 유사한 관계에 있음을 확인할 수 있었으며, 물리적 특성과 역학적 특성의 상관관계로부터 대략적인 설계정수를 추정할 수 있었다.

• 한국지반공학회논문집
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• 제36권2호
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• pp.17-28
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• 2020

본 연구에서는, 제주도 화산암의 인장강도와 관련하여, 기존의 연구결과 및 본 연구에서 수행된 시험결과에 대한 종합적인 비교·분석을 수행하였으며, 제주도 화산암의 압열인장강도와 일축압축강도로부터 추정된 점착력과 내부 마찰각의 특성 및 그 유효성을 각각 살펴보았다. 제주도 화산암의 압열인장강도는 흡수율과 밀접한 관계에 있었으며, 흡수율이 증가함에 따라 지수 함수적으로 급격하게 감소하는 특성을 갖고 있었다. 내부 마찰각은 압열인장도강도에 대한 일축압축강도의 비(σ_c / σ_t)와 밀접한 관계에 있었으며, 강도비 σ_c / σ_t가 증가함에 따라 내부 마찰각은 로그 함수적으로 증가하는 특성을 갖고 있었다. 그리고 제주도 화산암의 강도비 σ_c / σ_t는 내부 마찰각의 크기에 따라 약 5~20 사이의 값을 나타내고 있었다. 한편, 점착력(c)의 경우, 흡수율 및 압열인장강도와 밀접한 관계에 있음을 확인할 수 있었다. 점착력과 흡수율 사이에는 압열인장강도와 흡수율의 관계와 같이 지수 함수적인 관계에 있으며, 점착력과 압열인장강도 사이에는 선형관계에 있음을 확인할 수 있었다. 그리고 일축압축강도와 압열인장강도로부터 추정된 내부 마찰각과 점착력은 각각 삼축압축강도로부터 추정된 내부 마찰각과 점착력에 비해 약 13% 과소평가 그리고 약 24% 정도 과대평가되는 경향을 보였다.

• 한국지반공학회논문집
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• 제35권1호
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• pp.5-15
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• 2019

본 연구에서는 제주도 북동부 육 해상 및 북서부 육상에 위치한 현무암반에 대한 공내재하시험으로부터 계측된 변형계수와 RQD 및 RMR의 관계를 각각 살펴보았으며, 기존의 경험식들로부터 추정된 변형계수 값과 비교 분석하였다. 뿐만 아니라, 속도검층시험을 통하여 산정된 탄성파 속도비 및 동적 포아송 비와 변형계수의 관계에 대해서도 각각 살펴보았다. 그 결과, 다공성 구조 및 층상 구조가 특징인 제주도 현무암반의 경우, RQD 값만을 이용한 암반등급의 결정, 변형계수 계측방법의 선정 및 변형계수의 추정은 부적절하며, 최소한 RMR을 통하여 암반등급을 결정하고, 변형계수를 추정하는 것이 바람직하다는 것을 알 수 있었다. RMR을 이용한 기존의 변형계수 추정식은 제주도 현무암반의 변형계수에 비해 큰 값을 예측하는 경향을 보였으며, 탄성파 속도비 및 동적 포아송 비와 변형계수는 서로 정성적인 특성이 일치하는 관계에 있었다. 그리고, 적절한 제주도 현무암반의 변형계수를 추정하기 위한 RMR과 탄성파 속도비를 이용한 변형계수 추정식을 각각 제시하였다.