Internal combustion piston engines weren't used much for blue water ships in the World Wars. Steam engines, both piston and turbine, were more common for power, cost, and efficiency reasons. ICEs were mostly used on smaller boats, as well as submarines.
ICEs were crucial for aviation during the World Wars. Even today we're barely able to build electric airplanes that can go anywhere.
ICEs were crucial for aviation during the World Wars. Even today we're barely able to build electric airplanes that can go anywhere.