1971 Volume 46 Pages 45-53
It is difficult to detect a small target on sea surface for a radar. If a target is active, even though it is small, a radar can detect it easily far away. The radar bouy is a socalled tranpender which receives a radar wave and transmits a UHF signals. Now-a-dys, it is used generally to find fishing nets. The coverage of radar bouy is calculated about 11〜12 miles theoretically, but fisher men say that actual range is about 5〜6 miles, sometimes 4 miles or so at sea. Authors experimented evaluation tests for several times at sea and found the causes of shortage between the theoretical coverage and the actual. After some improvements for the equipment, good results were obtained.