• Title/Summary/Keyword: surveying ship

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Estimation of Water Depth in Coastal Area Using Hyperspectral Satellite Imagery (하이퍼스펙트럴 위성영상을 이8한 연안지역의 수심산정)

  • Lee Jong-Chool;Kim Dae-Hyun;Lee Young-Do;Yu Young-Hwa
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2006.04a
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    • pp.165-169
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    • 2006
  • Purpose of this research is estimation of water depth by hyperspectral remote sensing in area that access of ship is difficult This research used EO-1 Hyperion satellite imagery. Atmospheric and geometric correction is executed. Compress of band used MNF transforms. Diffuse Attenuation Coefficient of target area is decided in imagery for water depth estimation. Determination of Emdmember in pixel is using Linear Spectral Unmixing techniques. Water depth estimated using this result.

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Position of Light Buoy Using Method of Intersection (교회법을 이용한 해양 등부표 위치결정)

  • 이종출;김차겸;장호식;박종민;김세준
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2004.11a
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    • pp.491-495
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    • 2004
  • Harbor and bay is essential social overhead capital to our country economy national security. This harbor and bay is ever-present danger of marine accident by massed sea traffic discharge. A nautical mark in sea maintains safety of sea traffic and establishes in sea for increase of efficiency of ship service to prevent this sea accident. In this study, position of light buoy that establish for safety of harbor and bay that decided adjacent district along the coast base point by utilization method of intersection and evaluated and compares with DGPS measurement techniques.

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Estimation of Coastal Terrain Differences Using the Chart (해도를 이용한 해안 지형의 변화량 산정)

  • 양인태;한성만;최승필
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.20 no.2
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    • pp.207-214
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    • 2002
  • Development of the shore in western sea is decreasing of silt and is threatening sea ecosystem. Large size land-reclamation work by industralization have caused weather changes and sea changes, and have generated much changes topography of sea bottom and coastline. Also, It is influencing to route of ship. In this research, line for 0 m, 2 m, and coastline of land portion is digitalized. It is divided in four block, and is analyzed severally to know the degree of coastal changes by new airport construction, new town construction, and tide embankment construction.

A Study of GPS Ship Navigation System Using Precise Coordinate Conversion Algorithms. (정밀 좌표변환 알고리즘을 이용한 인공위성 항로추적시스템에 관한 연구)

  • Chang, Yong-Ku;Mun, Du-Yeoul;Choi, Sung-Jae;Lee, Young-Hee
    • Journal of Navigation and Port Research
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    • v.27 no.1
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    • pp.41-48
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    • 2003
  • The most great GPS is working on CNS(Car navigation System) and Personal terminal, but ocean has not been. First studied GPS is sailing to ship but We have been connivance that The ship is not need detail navigation. Lately, harbor facilities and transportation service in harbors are complication. We have need accurate ship navigation system. In this paper, author developed algorithms of ellipsoid conversion between WGS84 and BESSEL and develope algorithms of map projection between ellipsoid coordinate system, and plane cartesian system. Author used 3-parameter in covering ellipsoids and used TM and UTM projection in converting between ellipsoid and plane cartesian coordinate. And author analyzed errors through static surveying and dynamic surveying of GPS for proving accuracy of GPS sensor, Furthermore author analyzed deflection error of received position. Finally author developed real time ship navigation system using cheep GPS sensor.

A Technique for Measuring Ship's Draught by ultrasonic Pulse Signal

  • Lee, Eun-Bang;Lee, Sang-Jib
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 1995.11a
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    • pp.184-192
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    • 1995
  • Although ship's draught information onboard is substantial for both the safety of navigation and the estimation of loaded cargoes its accuracy depends in traditional surveying method on the skillfulness of observers and the condition of the sea surface round the vessel. To obtain more accurate information accessibly measuring instruments with sophisticated sensors such as mechanical electronic and ultrasonic transducers have been developed. however they have still limitation in accuracy and in making up a system due to the complexity of processing signal. In this paper we propose a he technique for analyzing ultrasonic pulse signal in order to improve the measurement accuracy and simplify a remote sensing system of draught by ultrasonic waves. This technique is useful for measuring draught being considered the influence of sea surface fluctuation and for transferring its data briefly to required equipment in integrated bridge system.

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Calibration of Hydrographic Survey Multibeam System Using Terrestrial Laser Scanning and TS Surveying (지상 레이저 스캐닝과 TS 측량을 이용한 멀티빔 시스템의 검·보정)

  • Kim, Jin Soo
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.31 no.3
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    • pp.199-207
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    • 2013
  • In hydrographic survey, data surveyed with multibeam system includes various errors due to multiple factors. These are corrected by a calibration called patch test, and if existing method is used, the test needs to be conducted for about 8 times for precise system calibration. For more prompt and precise multibeam system calibration, the exact offset of a ship was determined using terrestrial laser scanning and TS surveying, which was used as the initial input for the patch test. In the result, the error of closure was 0.001 m or less for TS surveying and backsight error was 0.005 m or less for scanning. All the surveying data based on the same local coordinate was converted into vessel reference coordinate during which R-square for all rotation angles was 0.99 or higher and standard deviation was 0.008 m or less. Finally, in a patch test using calculated offset of sensors and motion sensor offset, the offset of MBES transducer satisfied manual on hydrography only with 1-time calibration. With these results, it is thought that terrestrial laser scanning and TS surveying can fully be utilized for multibeam system calibration.

An Empirical Study on the Satisfaction of Shipboard Training for Marine Engineering Part Cadets: The Case of Korea Maritime University (실습생의 승선실습 교육의 만족도에 관한 실증연구 -기관계열 실습생의 실습선 교육을 중심으로-)

  • 김성국
    • Journal of Advanced Marine Engineering and Technology
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    • v.22 no.2
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    • pp.146-173
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    • 1998
  • It is one of the most important factors Seafarers Education Quality Assurance and management in Higher Maritime Education Institution. The educational process and result of Higher Maritime Educational Institution. The educational process and result of Higher Maritime Educational Institution should be evaluated according to the 1995 Amendments to the International Convention on Standards of Training Certification and Watchkddping for Seafares(STCW) 1978. Actuall above-mentioned evaluation is deemed to make foundation in order to enhance the efficiency of shipboard education by surveying the satisfaction of shipboard training for Marine Engineering part cadets by the group. In this paper we carried out the questionnaire survey to study stisfactory value and the reason of dissatisfaction of 89 cadets being trained on board the Training Ship in Maritime College of Korea Maritime University The results were calculated by frequency and percentage; the significance of difference among Department groups like Marine Engineering Maritime polic and Ship Operating Systems Engineering Engineering was analysed by $x^2$ inspection.

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The effect of the ISM Code revision in the shipping industry - Focusing on ship price and hull insurance - (ISM Code 개정이 해운산업에 미치는 영향에 관한 연구 - 선가 및 선박보험에 대한 영향을 중심으로 -)

  • Lim, Sung-Yong;Woo, Su-Han
    • Journal of Navigation and Port Research
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    • v.37 no.1
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    • pp.113-121
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    • 2013
  • IMO(International Maritime Organization) is existed the movement for revising ISM Code so that the maintenance history and the trouble information given trading in a ship can be transferred. An empirical analysis was made on the influence that will have upon shipping industry through surveying on the recognition on ISM Code revision in employees of the relevant field and on the expected problems given being amended ISM Code as the above. In conclusion, the positive effect is judged to be more in the aspect of ship safety, which is the aim of ISM Code, rather than the negative effect, which may take place given being revised ISM Code. In other words, the clean market can be formed through this because fairness is maintained on both sides given trading in a ship by which opening the maintenance record and the trouble history is applied equally to a buyer and a seller. Ships can be reduced a loss of time and cost in preventing similar problems and seeking solution that may appear in important equipments, through this maintenance record. Also, based on these materials, it comes to be available for analyzing a risk of ship and preventing and managing a risk, thereby being increased ability of maintenance and repair in a ship, resulting in being judged to likely contributing to ship safety and environmental-pollution prevention.

A Study on perception of effects about ISM Code amendments (ISM Code 개정 시 미치는 영향 인식에 관한 연구)

  • Lim, Sung-Yong;Jo, Min-Chul
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2013.06a
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    • pp.163-165
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    • 2013
  • IMO(International Maritime Organization) is existed the movement for revising ISM Code so that the maintenance history and the trouble information given trading in a ship can be transferred. An empirical analysis was made on the influence that will have upon shipping industry through surveying on the recognition on ISM Code revision in employees of the relevant field and on the expected problems given being amended ISM Code as the above. In conclusion, the positive effect is judged to be more in the aspect of ship safety, which is the aim of ISM Code, rather than the negative effect, which may take place given being revised ISM Code. In other words, the clean market can be formed through this because fairness is maintained on both sides given trading in a ship by which opening the maintenance record and the trouble history is applied equally to a buyer and a seller. Ships can be reduced a loss of time and cost in preventing similar problems and seeking solution that may appear in important equipments, through this maintenance record. Also, based on these materials, it comes to be available for analyzing a risk of ship and preventing and managing a risk, thereby being increased ability of maintenance and repair in a ship, resulting in being judged to likely contributing to ship safety and environmental-pollution prevention.

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Estimation of Coastal Terrain Differences by time-series using GSIS and The chart (GSIS를 이용한 해안 지형의 시계열 변화량 추출)

  • 양인태;한성만;최승필
    • Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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    • 2002.04a
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    • pp.219-228
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    • 2002
  • Because western sea on the shore development is threatening sea ecosystem by decrease of silt and large size land-reclamation work by industrialization causes surrounding weather change and sea change, generate much changes bottom of the sea topography and coastline. Also, is influencing to route for safe entry into port of ship, departure. Therefore, this research did 0m boundary line, anxiety 2m line which appear to coastline of land portion and the border of silt using sea base level of lowest low tone side that is base line that appear because of sea waves to basis data numerical value Tuesday, numerical value by divide drawing that is changed to 4 area and analyze change degree of new airport construction and new town development, seashore by western sea district along the coast development of tide embankment construction and so on and bottom of the sea recognize.

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