This paper describes the four original Farrell Lines C6-class containerships and the lengthening of two of the ships by 144 ft (44 m) to C8 class. Also described are two additional C8-class ships presently building which will be the largest to be built in the Unites States. These ships—particularly those of the C8 class-contain many novel features, including an overfeed refrigeration system for the reefer cargo holds, new types of insulation for the refrigerated spaces, and an on-deck securing system that eliminates the need for container lashing. The high-efficiency automated power plant is described along with its operating experience. The Farrell Lines' ships can be considered as representing two "areas" of three design variations; namely, the "deckhouse" area (including machinery space, accommodations, etc.)—generally unaffected by vessel type—and the cargo-carrying area (both on-and underdeck)—almost exclusively influenced by cargo characteristics. The three design variations of this one owner—C6-S-85a, C8-S-85c, and C8-S-85d—represent, respectively, a basic design acceptable with variations for two different owners: a lengthening/conversion of two of the four vessels of the first design to extensively increase their refrigerated cargo capacity (within the limitations of conversion) and two near-sister ships of the lengthened/conversion design (maintaining most of the design characteristics but free of conversion limitations). Finally, the design coordination between the two owners is discussed along with some "dream" features for the new design.