english: The reason why they have to work in winter is because they don't have the money to work in summer and spring, which, if they did that, they would need ships and submersibles to do their work.
non_english: Razlog zbog koga moraju da rade preko zime je zato što nemaju finansijskih sredstava da rade u proleće i leto, ukoliko bi to poželeli, trebali bi im brodovi i podmornice da obave njihov posao.