Sodium thiosulphate is a chemical compound with the formula Na2S2O3. It is commonly used in the maritime industry for a variety of purposes.

One of the primary uses of sodium thiosulfate in the maritime industry is for water treatment. Specifically, it is used as a dechlorinating agent to remove excess chlorine from water that has been treated with chlorine as a disinfectant. This is important because excess chlorine can be harmful to marine life and can also cause corrosion and other damage to equipment on board ships.

Overall, sodium thiosulfate is an important chemical compound in the maritime industry, with a wide range of applications related to water treatment and chemical reactions. Its ability to remove excess chlorine from water is particularly important for ensuring the health and safety of marine life and equipment on board ships.