Integrated full electric propulsion has become a normal first choice for several commercial operators, in particular for cruise ships where it proves to be a fuel efficient transmission system. Operating profiles for warships of frigate sire and above are similar to cruise ships with long periods at well below full power However the sire, weight and initial cost of electric propulsion equipment has generally precluded selection for warships. With the application of modern technologies, equipment power densities are being increased such that integrated full electric propulsion has now become a serious competitor to the mechanical transmission systems traditionally adopted for warships.