A Study on the Safe Route through the Analysis of the Density of the Gill Netters in the West Sea

국문 초록 (Abstract)

본 연구는 서해안에서 상선의 어구 손괴로 인한 추진기 장애를 예방하기 위해 연안자망어선의 월별분포를 제시하였다. 분석 방법은 2014년 1년간의 어선위치발신장치 데이터를 이용하였다. 조업 해구도를 기준으로 경 위도 $30^{\prime}{\times}30^{\prime}$크기의 해구별 간격으로 격자를 설정하였다. 총 56개 해구를 대상으로 격자를 구성하였다. 연구 결과 밀도지수가 가장 높았던 194해구는 어구 손괴가 없었다. 반면, 밀도지수가 상대적으로 작은 193해구는 상선의 주 통항경로에 어구가 설치되기 때문에 손괴가 발생했다. 이 분석을 바탕으로 어구 손괴는 밀도지수에 비례하지 않고 상선의 주 통항경로에 따라 손괴위험이 존재하는 것으로 나타났다. 따라서 상선의 안전항해를 위해 5월부터 9월까지 위도 $34.5^{\circ}{\sim}35.5^{\circ}$, 경도 $125.67^{\circ}{\sim}126^{\circ}$를 항행경보구역으로 통보하면 추진기 장애와 어구손괴와 같은 해양사고를 예방할 것이다. 따라서 상선이 193해구와 203해구를 항해할 때는 안전한 항해를 위해 위도 $34.5^{\circ}{\sim}35.5^{\circ}$, 경도 $125.5^{\circ}{\sim}125.67^{\circ}$을 추천한다.

다국어 초록 (Multilingual Abstract)

This study attempted to present the monthly distribution of the inshore gill netters for the prevention of propeller failure caused by the damage of fishing gear by the merchant vessels in the West Sea. This study was conducted using the transmitting device of fishing location (V-Pass) data for 1 year in 2014. The grid intervals are $30minute{\times}30minute$ ($latitude{\times}longitude$) based on the section of the sea. A total of 56 sections were analyzed by constructing a grid. The results revealed that the section no. 194 with the highest density index showed no fishing gear damage accident. But the section no. 193 with a relatively lower density index showed more frequent fishing gear damage accident. It is because the section no. 193 is included in the main route of the merchant vessels. Based on this analysis, it is found that the fishing gears are not damaged in proportion to density index but risk of damage exists according to the main routes of merchant vessels. Therefore, for the safe navigation of the merchant vessels, notifying the waters of $34.5^{\circ}{\sim}35.5^{\circ}$ at latitude and $125.67^{\circ}{\sim}126^{\circ}$ at longitude, as a navigational warning area from May through September, will prevent marine accident, such as propeller failure and fishing gear damage. Accordingly, when the merchant vessels navigate in the section no. 193 and 203, the area of $34.5^{\circ}{\sim}35.5^{\circ}$ at latitude and $125.5^{\circ}{\sim}125.67^{\circ}$ at longitude is recommended for the safe navigation.

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