Released in November 2009
Today, car carriers are loaded and unloaded by simply driving the cars on and off. This method, now commonplace, was a revolutionary concept in 1965, when MOL introduced the Oppama Maru in Japan.
1950s |
The Era of General Cargo Freighters Before seaborne transport of automobiles by specialized carriers became common, vehicles were loaded and unloaded one by one using cranes, and transported by conventional liners that carried mainly general commodities. Loading and unloading operations with cranes required great care and took a lot of time - only 15 cars could be loaded in an hour. It was also difficult to avoid cargo damage due to accidental contact of cars and the collapse of other stacked cargo as the vessel pitched and rolled during the voyage. |
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1960s |
Introduction of Car Bulkers As transport of automobiles between Europe and U.S. increased, vessels with some stowage space designed for cars were launched. Those vessels at the time were called "car bulkers," and could transport bulk cargo as well. Movable car decks were installed so these ships could transport automobiles on outward voyages and bulk cargo such as grain on the homeward leg. At the time, these combined carriers were considered the epitome of transport efficiency. Automobiles were loaded and unloaded by the lift-on/lift-off (LO/LO) system, which used onboard cranes. Development of the roll-on/roll-off (RO/RO) system made loading/unloading operations much faster and resulted in much less cargo damage than with the LO/LO system. It was a completely new idea - just drive the cars on and off the ship. In 1965, MOL launched the Oppama Maru, which was equipped with Japan's first RO/RO system loading/unloading equipment specifically for automobiles. Cars could be loaded at a rate of 100 units per hour, drastically shortening loading/unloading time and greatly reducing cargo damage. Rampways for stowage were placed at the stern and center of the vessel. The Oppama Maru, which set the stage for today's specialized car carriers, represented a new era in automobile transport technology. The Oppama Maru reflected a new approach - designing and developing a ship for a specific mission, and meeting the challenge of future demand.
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1970s |
Age of PCCs The mid-1960s brought the launch of pure car carriers (PCCs), which transported automobiles only on both outbound and inbound voyages. Loading/unloading relied on the RO/RO system introduced on the Oppama Maru. PCCs do not have cranes because they are designed to transport only automobiles. In the 1970s, the main demand for automobile transport was handling exports from Japan, particularly small passenger cars. The theme of PCC design was to carry as many small passenger cars as possible. So designers minimized the height of the car decks, allowing more decks and increasing capacity. Until the mid-1980s, PCCs were used mainly to transport small passenger cars, and most car decks had very low ceiling heights of 1.65m. The first PCCs could accommodate 2,000 to 3,000 small passenger cars. Since then, as exports of Japanese cars continued to expand, PCCs grew larger,
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1980s |
The First PCTC By the end of the 1970s, pure car and truck carriers (PCTCs) were introduced to transport tall and heavyweight cargo such as trucks, buses, construction machinery, and agricultural equipment, which had become mainstream. Most of the car carriers constructed since the mid-1980s were PCTCs. This is because demand for transport of tall and heavyweight cargo increased, while car exports from Japan (particularly small passenger cars) decreased as automakers localized production. Standard PCTC features include liftable decks that can be raised or lowered to adjust deck height, and reinforced decks and rampways. Transport was varied by mixed loading of taller and heavyweight cargo as well as small passenger cars only. This allowed us to offer more flexible services.
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These ships can transport bulk cargo such as wheat or other grains, as well as automobiles. The design is basically a single-deck bulk carrier with a mobile deck in the hold.
The Oppama Maru, launched in 1965, was in the vanguard of car bulkers, allowing bulk cargo transport by removing the mobile deck to create a single deck.
Automobiles were loaded and unloaded by elevators and car lifters. These ships are also equipped with cranes for loading and unloading bulk cargo.
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When seaborne trade of automobiles was just beginning, the trade relied on conventional liners, and cranes were used to load and unload the vehicles one by one. This took a long time, resulted in frequent body damage, and required extra stowage space.
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All of today's car carriers are RO/RO type ships, with vehicles loaded and unloaded via rampways at the stern and in the center of the hull.
The vehicles are simply driven up ramps onto the ship and directly loaded on each car stowage deck through ramps inside the ship. There is no need to turn the vehicles around onboard the ship and the vehicles are driven directly to the upper decks by jumping slopes from the ramps, so loading and unloading are much faster and accidents and damage are much less frequent.
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Passenger cars can be loaded on normal decks, but buses, trucks, and heavy machinery need more headroom.
However, making all the deck ceilings higher can waste space.
Modern pure car and truck carriers (PCTCs) have liftable decks, which can be pushed closer together to maximize standard passenger car capacity or moved apart to accommodate taller vehicles.
Mobile scissor lifts onboard the ship lift the liftable decks to adjust the deck height.
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