Blockiness aside, there are a LOT of accuracy problems with this ship. Attatched are some images I took from a simulation game of how a real containership looks.
Though not immediate apparent on first glance, real containerships carry sockets on their exterior for navigation lights at night. Furthermore, the wings of your containership's bridge are overly large, your ship lacks any visible propulsion system, virtually all large modern ships have a feature known as a "bulbous bow", your containers are of no standard size that I know of (the pictured vessel has 8×40×8 foot container dimensions), and, lastly, containerships normally do not carry cranes! Cranes are features of docks, not vessels.
