霧中航法におけるレーダー・プロツテイングの意義と船舶衝突判例の考察(日本航海学会第37回講演会)

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We had given careful concideration to the interpretation of Collision Regulations Rule 16 (c) and the meaning of Radar plotting as provided for the Recomendations on the use of Radar, and then had applied the regulations to the typical cases of the Shipping Inquiries on the Court of Japan during past about 10 years between Radar equipped vessels. By this research on the collisions, we obtained the results as follows : (1) Distance into collision from first contact Miles ships 8' over…4 (13%) 2' over…15 2' under…13 (40.6%) (2) Time into collision from first contact 20 minutes before…10 ships 20 minutes after…22 ships (63%) (3) Speed in Fog (Fitted w/Radar) Initial speed…17 ships (65%) Moderate speed…9 ships (4) Fog signals Mostly not avaiable (5) Range Unknown (6) Recomendations on the use of Radar Not observed strictly at all As a result of the investigation, we have concluded that the proper Radar plotting by The Recomendations is the most effective procedure at present for Radar Navigation in fog, and if any vessels would practised the plotting, we should have to make reduce our casualties deal with shipborne Radar.
社団法人日本航海学会の論文
1967-12-25