The use of a turbo-pump makes it possible to use hoses without any need to use electric motors in deep water.
Hoses are used extensively in offshore oil and gas applications. An impressive range of products can be found on the internet, including protective covers and floats. We have demonstrated the ease with which 30 cm diameter hoses can be installed at sea. The advantages were obvious; hoses are flexible and can be coiled. They are easy to transport.
Hoses can naturally find the most hydrodynamic position if they are allowed to. They work particularly well underwater where the weight of the water is negated. The fact that hoses can do this, makes them perfect for delivering deep sea cold water.