Complex sentence: She was later berthed for many years in the mud of the River Hamble where she served as a houseboat but gradually fell into complete disrepair, until her hull was shipped to Italy in 1990 in the hope of a refit.
Split into simpler sentences: She was later berthed for many years in the mud of the River Hamble where she served as a houseboat, but gradually fell into complete disrepair. In 1990 her hull was shipped to Italy in the hope of a refit.