The Carrier - Enteprise is the first aircraft carrier available in Empire Earth. It can house up to 15 fighter airplanes. It is useful to invest in them in scenarios where you are unable to build airports close enough to the enemy base, such as The Crocodile. While the fighter planes it produces are not as durable as those produced at an Airport, they are significantly cheaper and thus are useful in annoying raids on the enemy. However, the carrier is unable to defend itself and isn't fast enough to escape, so it's a good idea to keep five fighters onboard or guard it with some Battleships.
Unable to defend itself while being rather slow to move.