i was just thinking if they had a water cooling system around the boilers circulating all round the ship, they’d always have great hot water service. as well as a means to heat the ship through a temp control system.
A carrier at sea even in winter North Atlantic will run A/C units believe it or not. Lots of equipment to generate heat. In the spring & summer it can take about 1600-1800 Tons of cooling at times. No A/C means going back to port fast.