DC: Is it the alternative choice for naval power distribution?

Historically, the vast majority of electrical power distribution designs in marine applications have been Alternating Current systems. This has continued for recent platforms and is arguably due to commercial inertia, conservatism and the manufacturing and technology supply base. However; whilst it is widespread in use, it may not allow fully optimised power systems to meet tomorrow's demand for more efficient ships with greater flexibility. This paper, on the back of a recent programme of work, questions the future use of fixed frequency AC generation and power transmission on board ships, and asks if maybe Thomas Edison was on the right lines over a century ago?