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As the development of maritime resources with growing enthusiasm, quantity of offshore platforms are put into use. However, the installation of offshore platforms tends to impede navigation and fishing activities. To ensure the safety of platforms and nearby vessels, it is necessary to set the precautionary areas which have a broad range for offshore platforms, we propose one approach named “Tactical Diameter Method” to calculate the range for the precautionary areas based on the turning ability of the vessel. We calculate the distance between the initial position of one vessel and safety zones through tactical diameter, after adding the influence of wind, current and the distance for buffer, we finally get the range of precautionary areas. By using our approach, we can set the precautionary areas for the offshore platform effectively.

The Calculation Approach for the Setting of Precautionary Areas of Offshore Platforms Based on Turning Ability of Vessels