マリンレーダー自動警報装置による監視効果の向上について(日本航海学会第17回講演会)

抄録

Authers have planned and completed an automatic alarm device which will be additionaly fitted to the ordinary marine radar equipment. The idea is to set warning range ring zone of 1-2 miles, 2-3 miles or 3-4 miles (one mile's wide each) changeable mechanically as desired on the radar scope. And gives the sound and light alarm of the object when any target comes in this warning zone. After the shore and sea test it was proved to detect the objects-ship, buoy, rock or land-sharply and work in good conditions. The navigator on watch will be released from watching the scope continually, and be instantly informed when any object comes in the zone. So he is free from sight and mental fatigue resulting from his continuous lookout on the scope until he alarmed. This will greatly raise the reliability of marine radar equipment as navigational aid.