S57 标准，是 数字海道测量数据传输标准。在于对各国海道部门之间用于交换数字化海道数据以及传递给 生产常见、航海者和其他用户的标准加以说明。(S57 standard is the digital hydrographic data transmission standard. Is to explain the national Hydrographic Department for digital hydrographic data exchange standard and passed