水下定位 meaning in English

hydrolocation
underwater orientation

Simple analysis on the development of the underwater allocation technology
浅谈水下定位技术的发展
A new technique for liquid refractive index measurement by stratified film interference
超短基线水下定位的关键技术分析
The traditional positioning for submarine depends on inertial navigation system ( ins )
常规的潜艇水下定位依靠惯导系统。
This scheme constructs an underwater positioning system based on the combination of dgps and acoustical positioning
该方案构建了由dgps定位和水声定位相结合的水下定位系统。
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。