They were coal burners. The fleet had to plan its route in order to allow it to get to stations where it could coal up or from which colliers could sail to coal them up. I believe that by the time of the “biggie” (WWII) most fleets were oil fueled and the smoke could be better controlled. If the modern liberal....er, uh progressive environmentalist trash were paying attention our fleet today would be powered by sails instead of nuclear power. Of course we wouldn’t need a fleet because we would have surrendered by now. Perhaps President Paul can achieve that when he surrenders.