Abstract:

Expendable Conductivity Temperature and Depth (XCTD) is an advanced marine dynamic environmental element measuring instrument, which can be used on various civil and military vessels, aircraft or submarines to quickly obtain underwater environmental information data. It is a standing instrument for marine survey and an important supplement to traditional measuring instruments such as marine environmental monitoring buoy, submarine buoy and shipborne CTD because of its flexibility, economy and simplicity. At present, the Expendable Conductivity Temperature and Depth is widely used in the field of ocean profile observation because of its characteristics of simple measurement, high measurement efficiency and low hardware cost. In order to understand the development gap at home and abroad and clarify the future development direction of this field, this paper expounds the development status of the expendable marine exploration instruments at home and abroad through comparative analysis and summary starting from its classification, at the same time, compares the main gap between domestic and foreign products, and focuses on the working principle and key technology of the Submarine-launched Expendable Conductivity Temperature and Depth (SSXCTD), meanwhile, the research summarized the future research directions in this field.

Key words: expendable conductivity temperature and depth, XCTD, submarine-launched expendable conductivity temperature and depth, SSXCTD, temperature measurement, depth measurement