Yes. Shit tons of fuel. Stored around and underneath on the bottom of the carriers. We used to grab a bit when we needed to clean up paint spills. JP5 is some potent stuff.

Then they duck out and get regular refuelings at sea. These refuelings at sea are a particualr vulnerable time for both the merchant marine tanker ship and the carrier. They are very very close to each other, hooked up by multiple lines, have almost no maneuverability during the procedure.