The four-sided otter trawl net (fig. 1, C) which is a modification of the Pacific-type net was introduced in the Philippines during the latter part of 1947 (Warfel and Manacop, 1950). Since then this net has been widely adopted by local otter trawl operators, especially those of Negros, Iloilo, Samar, and Pangasinan. It has a decided advantage over two other types introduced almost at the same time, the mestizo and the Florida otter trawl nets (fig. 1, A and B) in that it has a wider mouth opening and about five times longer wings than the Florida Type and needs less netting in construction than the mestizo type. Thus it is claimed to be more effective in catching fish and to last longer in operation than any of the other two types of trawl nets.
The present paper describes in detail the construction of a four-sided otter trawl net having 57 feet headrope which may be divided into preparation of the nettings, shaping of the parts, joining the parts together and hanging the net.