The top two images are of the Lexington as she was at the end of World War II with a straight deck and a "Measure 21" camouflage paint scheme. The middle images are of the Hornet after the SCB-27C and SCB-126 modifications. These modifications added the angled flight deck, hull blisters, and the hurricane bow, angled the smokestacks, enlarged elevator, and removed the five inch guns. The bottom image is the Essex class compartment scheme.
This image will be used on t-shirts, coffee mugs, and woodblock print polo shirts. You can see all the Essex Class aircraft carrier products at http://www.delphic.com/esclaica.html