Would it be worth converting Oasis-class cruise liners into NATO hospital ships or mobile rear bases during a major war?
Short answerOnly if planned and prepared before war; corridors, lifts, power, oxygen, medical systems, cost, and conversion time matter more than the ships' headline size.
NotesA cruise liner offers volume, but medical conversion depends on stretcher-width corridors, suitable lifts, robust electrical supply, oxygen distribution, and many other systems. Designing the conversion after war begins may take too long to matter. The hospital role is more plausible than a mobile rear base, yet NATO would probably not fund and standardize the preparation in advance.