开发电子海图相关的文档资料，支持S57的相关说明-Development of electronic chart documentation related to support S57' s instructions

利用VC+电子海图平台EC_IVMS SDK v30开发的程序，实现了海图显示定位功能。（需加密狗）-Electronic chart platform using VC+ EC_IVMS SDK v30 procedures developed to achieve the chart show targeting. (With dongle)