瞄准捕捞中拖网网位的控制方法初探

<正> 在拖网作业中,特别是中层拖网作业中,利用声纳来探测鱼群,进行瞄准捕捞,大大提高了生产率和经济效益.但问题是:如果某连续作业的单拖渔船,用声纳发现鱼群在船首右舷40～50度、水平距离600米处.这时渔船是否应该向右转45度直奔鱼群?这样做能否捕获这群鱼?网具所经过的位置如何?正确的转向角应该是多少?

Preliminary Consideration on the Adjusting Method of Net Position in Aimed Trawling

When sonar shows a fish shoal mark on the screen, should the trawler approach and head towards the fish shoal directly? Is the gear passing through the centre of shoal? In this paper. discribed the character of the gear tracks dealing with the ships manoeuvring, and introduced a table as the results of calculations and a graphic method for estimating the new course setting,and plotting the track of fishing gear used for aimed trawling or avoidence manoeuvring.