Large ships which carry cargo in truck-size intermodal containers.

Activly cruising or permanently docked.

A naval ship is a military ship (or sometimes boat, depending on classification) used by a navy. Naval ships are differentiated from civilian ships by construction and purpose. Generally, naval ships are damage resilient and armed with weapon systems, though armament on troop transports is light or non-existent. Naval ships designed primarily for naval warfare are termed warships, as opposed to support (auxiliary ships) or shipyard operations.[from wikipedia]

A tanker (or tank ship or tankship) is a merchant vessel designed to transport or store liquids or gases in bulk. Major types of tankship include the oil tanker, the chemical tanker, and gas carrier. Tankers also carry commodities such as vegetable oils, molasses and wine. In the United States Navy and Military Sealift Command, any type of tanker used to refuel other ships is called an oiler.[from wikipedia]