大地经纬度 meaning in English

geodetic latitude and longitude

This method makes use of acoustical relative positioning technique , extending the dgps positioning technique for surface applications to underwater cases . with this positioning system , the submarine can directly get its longitude and latitude , and the positioning precision can ensure to be the same level as the surface application cases of dgps
系统采用系缆浮筏作为潜艇利用dgps进行水下定位的中继站，利用水声相对定位技术将dgps水面定位向水下延伸，使潜艇在工作潜深就可以直接获得自身的大地经纬度坐标。