First of all, the dissertation reasons out the general mathematic models of radar plotting by means of the plane analytic geometry, and establishes the assessment factors of the system.
论文首先推导出雷达标绘的通用数学模型，并进一步确立系统的评估要素。
Radar plotting is the basis of collision avoidance with radar.
雷达标绘是雷达避碰的基础。
ARPA (Automatic Radar Plotting Aids) is a ship's main assistant equipments for navigation and collision. If it is to be used correctly, no doubt it will make active effect to ship's navigation.
ARPA(自动雷达标绘仪)是当今船舶导航避碰主要的辅助设备，如果使用得当，无疑对船舶航行安全将起到积极的作用。
ARPA (Automatic Radar Plotting Aids) is a ship's main assistant equipments for navigation and collision. If it is to be used correctly, no doubt it will make active effect to ship's navigation.
ARPA(自动雷达标绘仪)是当今船舶导航避碰主要的辅助设备，如果使用得当，无疑对船舶航行安全将起到积极的作用。
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