22.when passing one fathom bank , check the depth and variable sand waves below the sea level all the time by echo sounder
通过一托浅滩时,要一直测深校时水深及海面下多变的沙绞。
英语百科
One Fathom Bank Lighthouse
(重定向自One Fathom Bank)
The One Fathom Bank Lighthouse (Malay:Rumah Api One Fathom Bank or Rumah Api Permatang Sedepa) refers to two offshore lighthouses in the Strait of Malacca, specifically, on a shoal within Malaysian waters, dubbed One Fathom Bank (Permatang Sedepa), off the coast of the state of Selangor.