A Study on The Data Base of Effects toward Marine Traffic caused by Man-Made Structures and The Application of it to Marine Traffic Planning.

近年来，沿海地区在规划和建设桥梁、填海机场等各种建筑物时，出现了海上交通干扰的情况。在这项研究中，我们提出了一种新的海上交通调查系统的概念，该系统使用了一个设备和信息处理器，可以操作雷达来任意记录和再现图像。该系统的再现能力，使图像的再现方法分析，特别是在实验室中，被证实和被证明是有效的。除了已经报道的交通分析方法外，我们还开发了连接雷达和计算机的接口，以及用于使用计算机处理观测结果的处理程序。这一发展使得在实验室中能够对雷达PPI上的目标进行计算机处理，这在过去是困难的。作为一个实际案例，我们在赤石海峡建造了一座大桥，并研究了利用图像处理从雷达图像信息中分析船舶的类型，从而成功地利用线性多元回归模型的公式来推定船舶的大小。目前，利用该系统进行的海上交通分析已应用于该桥的施工影响分析中，并为其提供了数据基础。可以说，这项研究为计算机分析的使用开辟了一个新的阶段。本研究的第二个主题是DECCA和LORAN-C导航系统传播异常的干扰和问题，这是包括巨型桥梁在内的海洋结构物对这类电子导航系统的新问题。

In recent years, disturbance of maritime traffic has been found in coastal areas where various structures such as bridges and reclaimed airports are planned and being constructed. In this study, we have proposed a new concept of a maritime traffic survey system using a device and information processor which can operate a radar to arbitrarily record and reproduce the images. This system's reproduction ability that enabled the analysis of images by reproduction method, particularly in the laboratory, was confirmed and proved effective. In addition to the traffic analysis method that already reported, we have developed an interface connecting the radar and computer, and a processing program for the purpose of using computer to process the observation result. This development enabled the computer processing of a target on a radar PPI in the laboratory, which was difficult in the past. As a practical case, we worked on the construction of a bridge at the AKASHI Channel and studied the image processing to analyze the type of vessels from the radar image information.As a result, we succeeded in presuming the size of vessels using the formula of a linear multiple regression model. Aready, the maritime traffic analysis using this system has been applied to the aforementioned bridge to analyze the construction influence and provide the data base. It can be said that this study developed a new phase for the use of the computer analysis. The second subject of this study is the disturbance and problems of the propagation anaomalies of Decca and Loran-C navigation system, as new problem are to such electronic navigation system by maritime structures including huge bridges.