Ro-ro — short for roll-on/roll-off — is a cargo handling method where wheeled cargo drives on and off the vessel via stern and side ramps, eliminating the need for cranes or container handling equipment. The category covers passenger ferries with vehicle decks, trailer-only freight ferries, and the dedicated deep-sea pure car and truck carriers (PCTCs) that move new vehicles between continents.
Vessel design
PCTCs are tall, slab-sided vessels with a stern ramp capable of supporting heavy commercial vehicles and ten or more decks of liftable car-deck panels. The largest PCTCs carry over 8,000 cars on a single voyage. The decks are arranged so that vehicles can be loaded and discharged in a strict choreographed sequence, allowing the vessel to call at multiple ports during one rotation while keeping each port’s cargo separated.
Trade patterns
PCTC trade is dominated by a small number of Japanese and South Korean operators — NYK, Mitsui OSK, K Line, Wallenius Wilhelmsen, Hyundai Glovis. The vessels run on fixed liner-style rotations between manufacturer ports (Yokohama, Nagoya, Pyeongtaek, Bremerhaven, Zeebrugge) and consumer-market import ports (Baltimore, Brunswick, Tilbury, Antwerp). Outbound legs from Asia carry new vehicles for the European and US markets; return legs carry used vehicles to African and Middle Eastern markets and project cargo wherever it can be found.
Reading ro-ro calls in the directory
When PortWatch shows ro-ro vessels (“Vehicles Carrier” or “Ro-Ro Cargo” in the type field) calling at a port, the port is almost certainly serving as either an automotive export gateway, an import distribution centre, or a transhipment hub on a multi-port rotation. Port calls of less than 12 hours are typical for major rotations. The dedicated terminals are easy to spot from satellite imagery: large flat parking lots with thousands of cars in tightly packed lines.