They normally work in pairs, the wreck being slung between them on special 9-in. E.S.F.S.W. hawsers rove as shown in the figure below.
Zisoloko zisebenza ngezibini, inqanawa eyaphukileyo exhaswe phakathi kwazo okanje ejinga phakathi kwazo kwesisodwa isithoba, ES. F.S.W. iintambo ezinkulu zitsalwa njengokuba zibonisiwe kumboniso ongezantsi.