• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 1997년도 Proceedings of KIN-CIN Joint Symposium 97 on Safety of Shipping and History of Maritime Communication between Korea and China around 9th Century
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• pp.175-183
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• 1997

The Jiao Guan Ship was a sea ship, used by Zhang Baogao, the Silla great sea merchant, in the marine trade with china during the 8th cetury A.D. and the 9th century A.D. Studying on the Ship type of the Jiao Guan Ship is the urgent problem to be solved, in the sphere of learning abuot the history of communication between China and Korea. The authors take the initial probe into this subject , by researching Zhang Baogao's marie activities, and point out that the Jiao Guan Ship's original type should be the Sha Ship which was the sea ship sailing the sea in northern China , in the tang Dynasty. At the same time, the authors estimate the constructions and equipment of the ship.

• 기술사
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• 제34권3호
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• pp.46-51
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• 2001

Patent Technology Map analysis of future ship type. Example ship type : Hydrofoil Craft. Air Cushion Vehicle Surface Effect Ship, Twin Hull Ship, Wing In Ground Effect Ship, Elelctrial Propulsion Ship, Icebreaking Ship, Submarine, LNG Ship Conclusion of future shipbuilding Technology Policy

• 대한원격탐사학회지
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• 제38권4호
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• pp.435-446
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• 2022

Identifying ship types is an important process to prevent illegal activities on territorial waters and assess marine traffic of Vessel Traffic Services Officer (VTSO). However, the Terrestrial Automatic Identification System (T-AIS) collected at the ground station has over 50% of vessels that do not contain the ship type information. Therefore, this study proposes a method of identifying ship types through the Random Forest Classifier (RFC) from dynamic and static data of AIS and V-Pass for one year and the Ulsan waters. With the hypothesis that six features, the speed, course, length, breadth, time, and location, enable to estimate of the ship type, four classification models were generated depending on length or breadth information since 81.9% of ships fully contain the two information. The accuracy were average 96.4% and 77.4% in the presence and absence of size information. The result shows that the proposed method is adaptable to identifying ship types.

• 대한조선학회논문집
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• 제41권5호
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• pp.28-33
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• 2004

Generally Horn-type rudders have been used for single propeller and single rudder system. The reason is that the rudder torques of Horn-type rudder are smaller than those of Spade rudder with same lift force. But it is found that the rudder cavitation occurs on a Horn-type rudder of fast container ship. In this paper the comparison results of Horn-type and Spade rudders are described. HPMM tests are carried out to compare the effects of two rudder types on the maneuverability of a ship. It is shown that the maneuvering performance of a ship equipped with Horn-type rudder is better than that equipped with Spade rudder by comparing the test results and maneuvering coefficients at scantling condition. The reason is that the movable part area of Horn-type rudder is about 14％ larger than that of Spade rudder with same total area. And the rudder torque of Spade rudder is greater than that of Horn rudder. At ballast condition, however, the effect of rudder type is negligible.

• 한국항해학회지
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• 제18권2호
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• pp.19-40
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• 1994

Several factors can be chosen for evaluating seakeeping performance, such as deck wetness, propeller racing, slamming, rolling, vertical acceleration and vertical bending moment, in consi-deration of the safety of human being, cargo and ship. In fact, there are few developments for an evalua-tion method of seakeepting performance correponding with each ship's characteristics. The purpose of this paper is to develop an quantitative evaluation method of seakeeping performance according to ship types. The scope and the method of this study are as follow. (1) Obtain each response amplitude of ship's motion in waves by Ordinary Strip Method and apply it to short-crested, irregular wave for random process of the factors on seakeeping performance. (2) Define the evaluation index, the dangerousness, the maximum dangerousness and the evaluation diagram. (3) Figure out the different characteristics according to ship types by computer simulation of evaluating seakeeping performance. (4) Adopt vertical acceleration and one of rolling or lateral acceleration as the factors on seakeeping performance by clarifying the correlation of stochastic process. This study developed an evaluation method coincident with each ship's characteristics, and suggested a device for application to actual ship. This method might be useful in developing the practical system of seakeeping performance in accordance with ship types. The ship models for computer simulation are 175m container ship types, 93m tranning ship HANARA as passenger ship type, 259m bulk-carrier type and 164m pure car-carrier type.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2000년도 Proceeding of CIN-KIN Joint Symposium 2000 on M.E.T. Under STCW 78/95 and SINO-KOREA MARITIME CONTACT IN MID-CENTURIES
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• pp.205-218
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• 2000

Hull forms of Jiao Yi Ship for shipping and foreign trade in Silla and Tang Dynasty were transformed and developed in accordance to their voyage and rational routes. The trade ship was a sea ship, used by Chang Po Go's, the Silla great sea merchant ship, in the marine trade with China during the 8th and 9th century. It is not easy to presume the hull type and trade formal of Chang Po Go's Jiao Yi Ship of the 8th and 9th Century. Studying on the ship type of the trade ship is the urgent problem to be solved, in the sphere of leaning about the history of communication between China and Korea. The authors take the initial prove into this subjects, by researching Chang Po Go's marine activities, and point out that the trade ship's original type should be the Sha Ship which was the sea ship sailing th sea in northern China, in the Tang Dynasty. This study aims to present materials concerning hull forms of Chang Po Go's Jian Yi Ship by analysing ancient voyage history, foreign trade history, and ship history of Silla, Tang and Japan during the 8th and 9th century.

• 한국정보통신학회논문지
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• 제25권12호
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• pp.1920-1926
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• 2021

선박용 전자식 경사계는 횡경사, 횡동요 주기 및 진폭 등 선박의 횡경사 관련 여러 가지 데이터를 측정하고 출력할 수 있는 장비이다. 선박안전성 판단지원이 가능한 전자식 경사계는 복원성능 안정성 지원 플랫폼이 탑재되어 있어 선박안전성(GM) 정보가 부족한 소형선박에도 자료제공이 가능하다. 선박에서의 GM은 항해사들이 복원성을 판단하는 중요한 요소이며, 선종에 따라 각기 다른 GM 범위를 가지고 있다. 본 논문에서는 선종별 안정적인 GM에 대한 선행연구사례의 방법론을 기반으로 하여 추가 선종에 대한 GM 분석을 통한 선종별 안정적인 GM과 한계경사각의 제안을 목적으로 한다. 또한 국제 규격에 충족하는 선박용 전자식 경사계에 선종별 GM 데이터를 내장하여 선박안전성 강화를 위한 GM확보 및 검토를 위한 자료로 활용되길 기대한다.

• 대한조선학회지
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• 제17권2호
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• pp.33-42
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• 1980

This paper compared the seakeeping quality of U, V type ships in infinite depth by using the finite element method. From the calculated results, it is found that heaving and pitching motions of V type are comparatively better than those of U type ship in the water of infinite depth and the reversed phenomenon occures in the water of finite depth. And the seakeeping quality of U type is better than V type ship in larger ranges than the nondimensional wave number 2.0.

• 한국해양공학회지
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• 제17권2호
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• pp.67-71
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• 2003

Using motions (Maruo) and wave reflection (the author), speed loss due to wind (van Berlekom) and ITTC standard spectrum, and various effects of weather(:such as weather intensity, ship type, ship size and draught) on ship speed performance at sea were investigated. Further, a comparison of the relative effects of weather and hull roughness on speed loss was also studied for a VLCC.

• 디지털융복합연구
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• 제14권7호
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• pp.145-154
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• 2016

본 연구는 Fuzzy-AHP방법을 활용하여 세계 주요선사의 선박투자 전략을 비교분석하는 것을 연구의 목적으로 하였다. 선박투자요인은 선행연구를 통해 1차적으로 선정한 후, 해운선사 근무경력 15년 이상의 전문가와 심층 인터뷰(Indepth-Inerview)를 수행하였다. 전문가의 지식추출이 가능한 Fuzzy-AHP를 사용하여 최종적으로 선박투자요인에 대한 가중치를 산정하였다. 선행연구에서 제시한대로 선사들을 "시황흐름 무관 선박투자" 형, "시황상승기 이전 선박투자" 형, "과다발주에 동참 후 시황하락" 형, "시황상승기 선박투자 회피" 형으로 분류하여 선박투자 전략을 비교분석하였다. 분석결과, "시황흐름 무관 선박투자" 형의 선박투자 우선순위는 해운운임(0.132), 중고선가(0.121), 선복량(0.103), "시황상승기 이전 선박투자" 형의 선박투자 우선순위는 해운운임(0.134), 선주여건(0.113), 정책금융기관의 지원(0.109)이 중요요인으로 분석되었다. "과다발주에 동참 후 시황하락" 형의 선박투자 우선선위는, 해운운임(0.173), 선복량(0.169), 국제정세 변화(0.121), "시황상승기 선박투자 회피" 형의 경우 해운운임(0.293), 선복량(0.232), 유가(0.150)가 중요한 요인으로 분석되었다.