Journal of Navigation and Port Research (한국항해항만학회지)

Korean Institute of Navigation and Port Research (한국항해항만학회)
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Estimation of Weight Parameters for Small Fishing Vessels in Accordance with Loading Conditions

소형 어선의 재화상태를 고려한 중량 정보 추정 기법

  • Kim, Dong Jin (Advanced Ship Research Division, Korea Research Institute of Ships and Ocean Engineering) ;
  • Yeo, Dong Jin (Advanced Ship Research Division, Korea Research Institute of Ships and Ocean Engineering)
  • 김동진 (선박해양플랜트연구소 친환경운송연구본부) ;
  • 여동진 (선박해양플랜트연구소 친환경운송연구본부)
  • Received : 2018.11.07
  • Accepted : 2019.01.23
  • Published : 2019.02.28
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Abstract

This study proposed estimation methods for weight and center of gravity of small fishing vessels. Weights loaded on small fishing vessels were divided into fixed weights such as crew, fishing gear, and variable weights such as fuel, fresh water, provision, bait, and fish. Based on statistical analyses with weight data of several small fishing vessels, weight, longitudinal center of gravity (LCG), vertical center of gravity (KG) of each item were represented as linear functions of vessel gross tonnage. In addition, weighting factors of variable weights were added on estimation formulas in accordance with vessel loading conditions, e.g. full load departure condition. Estimation methods were verified using actual small fishing vessel data.

본 연구에서는 국내 소형 어선의 재화상태에 따른 중량 및 무게중심 추정식을 제안하였다. 소형 어선에 탑재되는 중량물은 선원, 어구 등의 고정 중량과 연료, 청수, 식량, 미끼, 어획물 등의 가변 중량으로 분류할 수 있다. 다양한 소형 어선들의 중량 데이터를 통계 분석한 후, 각 탑재물의 중량 및 무게중심을 총톤수에 대하여 선형 함수화하였다. 그리고 재화상태를 고려하여 각 가변 중량물에 가중치를 부가하는 방식으로 총 중량 및 무게중심 추정식을 구성하였다. 소형 어선의 길이와 총톤수, 그리고 재화상태 정보만을 활용하여 총 중량 및 무게중심을 상당히 신뢰도 높게 추정할 수 있음을 검증하였다.

Keywords

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Fig. 1 An example of weight data of small fishing vessel

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Fig. 2 Number of fishing vessels according to vessel type

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Fig. 3 Fixed weight with gross tonnage

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Fig. 4 Longitudinal center of gravity of fish with gross tonnage

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Fig. 5 Vertical center of gravity of fuel with gross tonnage

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Fig. 6 Vessel length(Lpp) with gross tonnage

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Fig. 7 Comparison between estimated and actual weight of 29 vessels used in present analyses

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Fig. 8 Comparison between estimated and actual LCG of 29 vessels used in present analyses

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Fig. 9 Comparison between estimated and actual KG of 29 vessels used in present analyses

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Fig. 10 Comparison between estimated and actual weight of 8 vessels in Kim(1999)’s study

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Fig. 11 Comparison between estimated and actual KG of 8 vessels in Kim(1999)’s study

Table 1 Items on small fishing vessels

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Table 2 Standard loading conditions of fishing vessels

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Table 3 Small fishing vessels used in statistical analyses

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Table 4 Notations of weight and center of gravity

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Table 5 Weighting factors of variable weights according to loading conditions

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Table 6 Slopes and intercepts of weight functions

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Table 7 Slopes and intercepts of LCG functions

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Table 8 Slopes and intercepts of KG functions

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Table 9 Gross tonnage, length and total weight, KG information for 8 small fishing vessel by Kim(1999)

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References

  1. Fyson, J.(1985), Design of Small Fishing Vessels, Fishing New Books Ltd.
  2. Kim, J. N.(1999), "A Study on Stability Criteria of Small Fishing Vessel", Chosun University, Master's Thesis.
  3. Kwon, S. Y. and Lee, H. J.(2007), "Study on the Stability Criteria for Small Fishing Vessels and Cargo Ships", Journal of Korean Society of Ship Inspection & Technology, Vol. 22, No. 5, pp. 19-33.
  4. Ministry of Land, Transport and Maritime Affairs(2013), Standard of Stability and Full Load Draft Line of Fishing Vessels, 2013-164.
  5. Ministry of Land, Transport and Maritime Affairs(2014), Standard of Structure and Facility of Small Fishing Vessel under G/T 10 tons, 2013-279.
  6. National Fisheries Research & Development Institute(2010), Korean Coastal and Offshore Fishery Census.
  7. Park, B. and Yeo, D. J.(2015), "A Basic Study on the Estimation of Absent Information in Maritime Accidents", Proceedings of Annual Autumn Meetings of the Korean Society of Marine Environment and Safety.
  8. Song, H. C., Kim, Y. S. and Shim, C. S.(2008), "A Study for the Minimum Weight Design of a Coastal Fishing Boat", Journal of Navigation and Port Research, Vol. 32, No. 3, pp. 223-228. https://doi.org/10.5394/KINPR.2008.32.3.223