Far seas fisheries refer to those fishing activities performed beyond 200-mile exclusive economic zone of Taiwan. The main fishing methods used, include tuna longline fishing, tuna purse seine fishing, trawling, squid jigging and torch light saury fishing. In recent years, their production suppressed 880 thousand tons per annum, accounting over 65% of the total fisheries productions. Tuna longline fishery, which comprises of deep frozen longliners and the traditional longliners, is performed throughout the high seas areas of the three oceans. As for tuna purse seine fishery, the major fishing grounds are areas around the western and central Pacific Ocean. Squid jiggers operate mainly in the southwest Atlantic Ocean, north Pacific Ocean and the waters around New Zealand. The fishing grounds for trawl fishery have been greatly limited after the implementation of 200-mile exclusive economic zones by coastal countries, and vessels have to seek for joint ventures with such coastal countries as India, Indonesia, Oman and Yemen for securing fishing grounds. Some squid jiggers engage in saury fishing on part-time basis in the north Pacific ocean after the squid fishing season is over. Most of the tuna longliners and purse seiners use foreign ports as bases for replenishment of supplies, repair and transshipment of catch. Presently, more than 67 foreign ports have been approved by the Government, as fishery base ports.