Measurements of Midwater Trawl System and Dynamic Characteristics

중층 트롤 시스템의 계측 및 운동 특성

  • 이춘우
  • Published : 1998.09.01


Towing performance of a midwater trawl system was examined aboard the training ship KAYA(2900ps) at the East Sea using the midwater trawl gear that had been designed and manufactured in accordance with the vessel. In this experiment, the trawl system data, the towing speed, the length and tension of the warp, net mouth height, and the depth of otter boards and net were measured and analyzed. The results are as follows: 1. In case of heaving in the warp with constant towing speed, the tension was suddenly increased and then again was reduced and after returned to the original steady state tension. At this time, net height was reduced a bit by ascension of ground rope, but returned to it’s original value. In the case where the warp was paid out, the tension was suddenly decreased and after increased and then returned to the tension of the original state, and the net height was greatly increased instantly by the sinking of the ground rope and then returned to the steady state 2. In the case of increased towing speed mm constant warp length, the tension was increased, and reducing the net height, the gear depth was decreased. On the other hand, in the case where towing speed was reduced, the tension was reduced and the gear depth and net height was increased. 3. Otter boards show a swing motion in the scope of 5~ 10m continuously. Otter boards responded to the state change of the trawl system at first, and then the motion of the net appeared. 4. The depth of net center was about 20m deeper than that of the otter boards, it shows about 0.4 times the warp length at the 4knots towing speed.



  1. 漁業技術 v.30 no.3 간략화된 트롤시스템의 퍼지제어 이춘우
  2. 漁業技術 v.22 no.4 韓國近海에 있어서의 中層 트로올의 硏究-I, 展開板의 動作狀態와 展開性能 李秉錡;崔宗和;朴相吉;張鎬營
  3. 漁業技術 v.32 no.1 쌍끌이 中層트롤漁法의 硏究 IV, 實物漁具의 網口形狀 및 예망깊이에 관하여 張忠植;李秉錡
  4. 東水年報 v.56 no.5 高速曳網用超大目中層トロ-ル網の模型實驗 藤石昭生
  5. 日水誌 v.57 no.1 中層トロ-ル·システムにおけるとオツタポ-ドの 運動解析 三浦汀介;淸水普;西山作藏
  6. 東水年報 v.57 no.4 中層トロ-ル·システムの靜的特性の解析法 胡夫祥;松田皎
  7. 漁業技術 v.23 no.1 韓國近海에 있어서의 中層 트로올의 硏究-IV, 漁具의 流體抵抗과 展開板의 性能 李秉錡;金鎭乾;崔宗和;張鎬營
  8. Fisheries Research v.24 Depth control of a midwater trawl gear using fuzzy logic Lee Chun Woo