Image Credits: Wikipedia Definition: RoRo container ship, or ConRo, is a specialised vessel that can transport both vehicles and shipping containers at the same time. The ConRo vessel carries vehicles or wheeled cargo on enclosed decks and usually stacks shipping containers on the upper decks. A conventional Roll-on/Roll-off (RoRo) ship transports vehicles, whereas a containership transports standardised shipping containers. ConRo is a hybrid vessel that does both. ConRo ships, or RoRo container ships, are designed to load and unload vehicles onto their deck without shore cranes . Wheeled cargo drives on and off the vessel using built-in ramps, which can cut port time to as little as 24–48 hours compared with crane-dependent container ships. The lower decks of ConRo vessels are enclosed and fitted with internal ramps, much similar to dedicated car carriers. The vehicles are driven aboard and lashed to the deck. The upper decks are open and structured like a conventional container ship, where shipping containers are stacked. Not all ConRo vessels are designed the same way. Some carry shipping containers in cargo holds alongside vehicle decks, which are fitted with container sockets and lashing points. The container holds have cell guides (a standard feature of container ships) that help stack containers tightly and keep them secure. CEU and TEU As a hybrid vessel with different cargo types (containers and vehicles), ConRo measures capacity using multiple metrics. The three main units that are used are: 1. TEU (twenty-foot equivalent units) container capacity ConRo container capacity is measured by the number of standard 20 ft containers the vessel can carry. TEUs is the same metric that is used for container ships . 2. Lane metres or linear metres. Lane metres is the standard metric for measuring vehicle cargo in RoRo container ships. Lane metres is the total length of vehicle cargo lanes across all decks. 3. CEU or Car Equivalent Units This is also a common metric t