在典型的实验海区，使用双频测深仪和箱式取样器，对海底进行同步探测，获取双频测深仪不同底质类型数据。
Simultaneous bottom characteristics surveys were made by using dual-frequency echo sounder and box corer in an experimental sea area , and the bathymetric data and samples for different types of bottom material were obtained .
箱式取样器