• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2016.05a
• /
• pp.1-3
• /
• 2016

연안여객운송은 도서와 육지의 인적 및 물적 교류가 이루어질 수 있도록 하는 유일한 교통수단으로서 그 중요성이 매우 크다. 그럼에도 불구하고 연안여객선에서의 수익성이 낮다는 이유로 그 중요성을 인식하지 못하고 있는 것이 사실이다. 그렇지만 앞으로의 연안여객 수요에 따라 향후 도서민들에게 안정적인 서비스를 제공하기 위해 선박의 추가 투입 및 시설 확충을 위한 의사결정에서 가장 기본이 되는 것이 연안여객의 수요를 예측하는 것이다. 본 논문 에서는 가장 많은 여객 수요를 가지고 있는 제주지역 중에서도 세월호 이후에 끊긴 인천과 제주 항로에 초점을 맞추어 연구를 진행할 것이다. 2007년 1월부터 2013년 12월 까지 84개의 월별 자료를 바탕으로 예측 기법 중에서도 계량적 기법인 시계열 분석을 통해 여객 수요를 예측하고자 한다. 예측 작업에 있어 항상 우수한 성과를 보이는 단 하나의 모형은 존재하지 않기 때문에 예측에 수반된 불확실성을 줄이기 위해 다양한 예측모형을 사용한다. 여러 방법론 중에서 가장 적합도가 높은 모형을 찾아 여객 수요를 예측하고 결과를 도출하였다.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.40 no.1
• /
• pp.47-53
• /
• 2004

For the purpose of comparison between the designed coverage and actual coverage of Korean DGPS (Differential Global Position System) beacon stations, we have received the ship‘s positions with states and IDs of their stations on the navigation route of Jeju-Tianjin by automatic selection mode of DGPS receiver and on them of Jeju-Inchun and Jeju-Vladibostok by manual mode. Also in case that some obstructions were on propagation routes from DGPS beacon stations to receiving positions, a restriction on available ranges of DGPS beacon signals was investigated. The results obtained are as follows : 1. The coverage of Korean DGPS beacon stations was designed 100NM (Nautical mails) at 40.0dB(over ${\mu}$V/m). But the actual coverages of them according to their stations and propagation routes were 0.3-3.6 times as wide as designed coverage. 2. In case that the propagation route of beacon signals from DGPS beacon stations was on the sea, the propagation distance of north direction from the stations was longer than south direction. 3. The coverages of Echongdo and Ulungdo stations were 366NM on the yellow sea and 342.3NM on the east sea of Korea respectively, and were widest than any other stations. 4. The coverage of Marado station on the south and yellow seas of Korea was very unstable because of the Halla mountain on the propagation route. Maximum receiving range to be measured by automatic selection mode of DGPS receiver was 145NM on the route of Jeju-Tianjin on June 22-July 1, 2002. Minimum receiving range to be not measured by manual selection mode was 28.7NM on the route of Jeju-Inchun on June 26-28, 2003

• Journal of Advanced Marine Engineering and Technology
• /
• v.35 no.4
• /
• pp.491-499
• /
• 2011

Starting with maritime DGPS base stations of Palmido, Ochongdo which have been operated since 1999, truly our nation has become the most powerful country possessed with total of 17 DGNSS base stations in the field of DGNSS operation infrastructure. This paper examines into the country's DGNSS services as measuring the service range of the maritime DGPS base stations in the domestic ferry lines which sections are from Jeju to Incheon, from Busan to Jeju, from Jeju to Nokdong, the propagation characteristics of the radio waves of 300 kHz bands on sea and land path. As a result of identifying the service range of the DGPS in the sea routes of the southern sea and the western sea, the measured results of the DGPS signals are confirmed more than 100 NM(recommended service range). It can be possible to practical use the position information, which is safe navigation and various marine traffic management systems. It will be useful an expansion of maritime DGPS reference station in the near future.

• Proceedings of the KSRS Conference
• /
• 2006.03a
• /
• pp.87-90
• /
• 2006

인천-제주 정기여객선에 수온, 클로로필 및 탁도계 등의 센서를 설치하여 해양환경 모니터링 시스템을 구축하였으며, 여객선 항로를 따라 2001년부터 2004년까지 18회에 걸쳐 자동관측과 함께 20-30분 간격으로 30여개의 정점에서 해수를 채수하여 분석하였다. 연구의 목적은 채수된 해수를 직접 분석하여 여객선에 설치된 자동측정 센서가 신뢰성 있는 자료를 생산하는지 비교 분석하는 것과 서해 한반도 연안의 해수특성을 전체적으로 이해함으로서 계절적인 변동을 파악하는 것이다. 2001-2003년 초까지 사용된 YSI 센서는 수온, 염분, 탁도와 클로로필 농도 등을 종합적으로 측정할 수 있는 멀티센서이나, 설치하여 운용해 본 결과 정밀도에서 많은 문제점이 발생하였다. 따라서 2004년 이후 클로로필과 탁도 자동 측정을 위한 단일 센서들로 교체되었으며 이들 센서는 멀티센서 보다 좋은 결과를 보였다. 비록 자동측정 장치에 문제는 있었으나, 18회에 걸친 서해 연안의 실시간 모니터링을 통하여 해수환경의 계절별 특성을 이해할 수 있었다. 부유퇴적물의 경우, 경기만과 목포 주변의 남쪽 해안은 농도가 모든 계절에서 높게 나타났으며 특히 가을 겨울철에 가장 높은 값을 나타냈다. 클로로필의 농도도 경기만 중심지역과 남쪽 해안에서 여름과 가을철에 걸쳐 0.4 - 6.0 $mg/m^3$ 정도의 분포를 보였으나 겨울철에는 2.6 $mg/m^3$ 미만으로 나타났다.

• The Journal of shipping and logistics
• /
• v.34 no.4
• /
• pp.527-544
• /
• 2018

In this study, SNA analysis was conducted to examine changes in passenger movements in domestic coastal shipping. The validity of derivation of centrality rankings was enhanced by using the connection centrality that reflected weights, which had not been applied in previous research. The results of the connection centrality analysis indicated that the network composition ratio of the South Sea region was high, and the results of analysis of betweenness centrality indicated that ports belonging to the South Sea region recorded high ranks. Jeju Island, which acts as a gateway to the West Sea and the South Sea, Mokpo, which acts as a gateway between the land and islands, those ports that are geographically close to the land, and those ports that are smoothly connected to small ports, were shown to have betweenness centrality. Meanwhile, in the results of analysis of eigenvector centrality, not only ports in the South Sea region but also many ports in the West Sea region were included in the high ranked ones. Using these results, the port authority can identify major ports in domestic coastal shipping, determine the priorities support, identify the current situation of the port connection relations, and establish strategies for management of key development areas. As future studies, studies in the aspect of economy that separate general passengers and island passengers and utilize data such as fares, distances, and time are necessary.