Another reason many navies like turbines is that big diesels produce a lot of low frequency noise which travels very far underwater, so submarines can hear you

Another reason many navies like turbines is that big diesels produce a lot of low frequency noise which travels very far underwater, so submarines can hear you coming from a very long distance. Although many navies do operate combinations of diesels and gas turbines (CODAG etc.), in such cases the diesels need to be installed on special shock absorbing mountings, in some cases even with a diesel-electric drive to avoid coupling the vibrations of the engine to the hull via the propeller shaft.