Abstract
After having investigated the real circumstances of setting wireless navigational aids about 413 fishing boats amounting to the ratio of 90% of the whole boats which have the chief base at Shimonoseki harvor, we have confirmed the following results. 1. Radio Direction Finder 32% of the whole investigated boats have the aid. The items of various boats are as follows. Trawlers: 100%, Danish seine boats: 83% Purse seine boats: 57% 2. Fish Finder 20% of the whole investigated boats have the aid. The items of various boats are as follow. Trawlers: 59% Danish seine boats: 9%, Purse seine boats: 80%, Fish carryers following to Purse seine boat: 20%. 3. Marine Radar Only one of Danish seine boats was set up with the aids at Feb. 1952, moreover, one of them are on the way of being set up and two Trawlers and a Danish seine boat are planned to set up this aids. For the future, there is a distinct tendency to set up many more to them in the fishing circles.
