• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.147-148
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• 2022

Recently, as a number of accidents occur while berthing ships, the need for safety measures for ship operation in ports is emphasized. In order to quantitatively analyze the contents of safety measures in Busan New Port, this study collected ship trajectory data,, and based on this data, applied a maritime artificial intelligence algorithm to analyze the trajectory pattern. As a result, the waypoint of the ship arriving and departing Busan New Port was derived and the operation pattern of the ship's speed and course was proposed.

• Journal of Korea Port Economic Association
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• v.40 no.2
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• pp.175-189
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• 2024

Following the introduction of containerized sea transportation, the size of container ships has progressively increased. While the primary objective of this enlargement is to achieve economies of scale, it significantly affects the operational environment of ports where these ships dock, raising concerns about the validity of efficiency gains from ultra large container vessels from a port operational perspective. This study evaluates the efficiency of various ship sizes from January to December 2022, utilizing internal data from the container terminals A and B located in the Busan New Port. The analysis encompasses ships affiliated with The Alliance at Container Terminal A and those associated with 2M at Container Terminal B. Key input variables considered for the study include ship size (TEU), total berth time, and loading/unloading time, with cargo handling performance serving as the only output variable. The findings indicate that larger ship sizes exhibit higher efficiency compared to smaller container ships.

• Journal of Navigation and Port Research
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• v.41 no.3
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• pp.137-148
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• 2017

Port service level is a metric of competitiveness among ports for the operating/managing bodies such as the terminal operation company (TOC), Port Authority, or the government, and is used as an important indicator for shipping companies and freight haulers when selecting a port. Considering the importance of metrics, we developed software to objectively define and manage six important service indicators exclusive to container and bulk terminals including: berth occupancy rate, ship's waiting ratio, berth throughput, number of berths, average number of vessels waiting, and average waiting time. We computed the six service indicators utilizing berth 1 through berth 5 in the container terminals and berth 1 through berth 4 in the bulk terminals. The software model allows easy computation of expected ship's waiting ratio over berth occupancy rate, berth throughput, counts of berth, average number of vessels waiting and average waiting time. Further, the software allows prediction of yearly throughput by utilizing a ship's waiting ratio and other productivity indicators and making calculations based on arrival patterns of ship traffic. As a result, a TOC is able to make strategic decisions on the trade-offs in the optimal operating level of the facility with better predictors of the service factors (ship's waiting ratio) and productivity factors (yearly throughput). Successful implementation of the software would attract more shipping companies and shippers and maximize TOC profits.

• Journal of the Korean Society of Marine Environment & Safety
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• v.29 no.7
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• pp.980-991
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• 2023

To prevent accidents near the quay caused by a ship, ports are generally designed and constructed through navigation and berthing safety assessment. However, unpredictable accidents such as ship collisions with the quay or personal accidents caused by ropes still occur sometimes during the ship berthing or mooring process. Automatic mooring systems, which are equipped with an attachment mechanism composed of robotic manipulators and vacuum pads, are designed for rapid and safe mooring of ships. This paper deals with a displacement and velocity measurement system for the automatic mooring device, which is essential for the position and speed control of the vacuum pads. To design a suitable system for an automatic mooring device, we first analyze the sensor's performance and outdoor environmental characteristics. Based on the analysis results, we describe the configuration and design methods of a displacement and velocity measurement system for application in outdoor environments. Additionally, several algorithms for detecting the sensor's state and estimating a ship's velocity are developed. The proposed method is verified through some experiments for displacement and speed measurement targeted at a moving object with constant speed.

• Proceedings of the Korean Society of Coastal and Ocean Engineers Conference
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• 1992.08a
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• pp.23-27
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• 1992

대형선박이 접안하여 하역작업을 수행하는 동해안의 산업항중 포항신항에서는 과거의 연구나 한국해양연구소의 현장관측(건설부, 1987; 강 등, 1989)을 통하여 다양한 주기의 부진동이 존재함이 밝혀졌으며, 검조소가 없는 동해항의 인근에 위치한 묵호항의 검조기록을 검토한 결과 10분대의 장주기 부진동이 존재하는 것으로 나타났다.(중략)

• Proceedings of KOSOMES biannual meeting
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• 2017.11a
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• pp.104-105
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• 2017

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.54-55
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• 2020

In 4th Industrial Revolution, technologies such as artificial intelligence, Internet of Things, and Big data are closely related to the maritime industry, which led to the birth of autonomous vessels. Due to the technical characteristics of the current vessel, the speed cannot be suddenly lowered, so complex communication such as the help of a tug boat, boarding of a pilot, and control of the vessel at the onshore control center is required to berth at the port. In this study, clustering analysis was used to resolve how to establish control criteria for vessels to enter port when autonomous vessels are operating. K-Means clustering was used to quantitatively stage the arrival pattern based on the accumulated AIS(Automatic Identification System) data of the incoming vessel, and the arrival phase using SOG(Speed over Ground), COG(Course over Ground), and ROT(Rate of Turn) Was divided into six phase.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2016.05a
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• pp.26-28
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• 2016

선박 항해에 있어 GPS (global positioning system)는 선박의 3차원 위치를 추정하여 항로의 이탈이나, 항만 접안을 위하여 활용된다. 따라서 위성을 활용한 위치 정확도 향상을 위하여 본 논문에서는 GPS와 BeiDou의 결합 항법을 제안한다. GPS와 BeiDou 시스템을 결합하여 가시위성의 수를 증가시킬 수 있고, 이에 따라 정밀한 위치를 추정할 수 있다. 본 논문에서 제안한 GPS/BeiDou 결합 항법의 성능 평가를 위하여 실제 수신된 위성 데이터를 활용하였고, GPS 단독 측위와의 가시위성 개수 및 위치정확도를 비교, 분석 하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2017.11a
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• pp.121-123
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• 2017

계선주는 선박이 접안 중 안전성을 확보하는 설비로서 계류안전성 평가에 필수 설비 중 하나이다. 이러한 계선주는 국내 항만 및 어항설계 기준의 견인력에 따라 규격이 구분되어 설치되나 규격별 성능 확인을 위한 평가 방법이 제시되지 않아 평가 방법 검토가 필요하다. 이 연구에서는 견인력에 따라 설치되는 계선주 규격별 제원을 분석하여 재질과 특성에 따라 견인력에 따라 작용하는 수평력과 수직력을 휨 응력과 전단 응력으로 나누어 분석하고 이에 따른 성능 적정성을 평가하고 살제 허용 견인력을 평가 하고자 하였다. 또한 계선주 설치 후 노후화로 인한 성능 변경을 평가하고 예측하고자 두께를 통한 평가 방안을 검토하고자 하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.06a
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• pp.335-337
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• 2011

e-navigation은 선박의 항구 출발부터 목적 항의 부두 접안에 이른 전 과정의 안전과 보안을 위한 관련 서비스 및 해양환경 보호 증진을 위해 전자적인 수단으로 선박과 육상 관련 정보의 조화로운 수집, 통합, 교환, 표현 및 분석을 수행하는 개념적 체계이다. e-navigation 구현에 필요한 음성 및 데이터 통신 채널의 확보방안 중 하나로 기존 해상 통신의 현대화 및 다중모드 운영 체제의 필요성이 국제해사기구(IMO) 등에서 강력히 요구되고 있다. SDR은 소프트웨어로 구성된 블록들 내부의 동작 파라미터를 변경함으로써 하나의 플랫폼 상에서 다양한 형태의 통신을 가능하게 하므로, 기존 해상 통신의 현대화 및 다중모드 운영에 유용하다. 따라서 본 논문에서는 다중모드 운용을 위한 기존의 해상무선통신 시스템을 이해하고, SDR 적용 방안을 제안함으로써 단일 기기를 통한 공간적 연속성을 갖는 통신망 구축을 이루고자 한다.