대수심 침체어망 조사장비 실해역 성능시험

Abstract

The problem of derelict fishing nets on the seafloor is now in Korea to be settled for its continuous influence on the fishing grounds and nearshore/offshore ecosystem particularly of seabed in deep seas(500～1,000m) of the East Sea. In order to resolve this matter, we have developed a practical and efficient survey equipment for sea bottom fishing nets, which consists of a guide frame of Tow-sled type, deep-sea camera, a recording unit and a position tracking device. This paper presents brief introduction of the developed equipment with description of mounted attachments and required accessories. In addition, we state meaningful results of site-experiments at 230m water depth and indicate requirements for application to 1,000m. We believe that the developed system has proper specifications for 1,000m depth, and position tracking device, side scan sonar and support vessel must be appropriately chosen for safe and efficient usages.