Cargo ships are a key mode of maritime transportation, playing a vital role in shipping large volumes of goods. These vessels operate in various trade activities, both domestically and internationally.
In the intermodal transportation system, cargo ships are a key component of the global supply chain because they can efficiently transport a wide range of cargo by sea.
To better understand the functions, types, and operating principles of cargo ships, explore the explanation below.
What Is a Cargo Ship?
A cargo ship is a type of vessel, or logistics transportation, used to transport goods, cargo, or commodities in large quantities via sea routes.
These ships play a vital role in logistics, international trade, and interregional goods distribution because they can efficiently carry a wide range of cargo.
Cargo ships can transport various types of goods, ranging from containers and industrial raw materials to vehicles and bulk cargo such as coal and wheat.
There are also various types of cargo ships, ranging from container ships and bulk carriers to tankers and vehicle carriers, each tailored to specific shipping needs.
Behind their massive operations, what types of fuel are commonly used by cargo ships? Cargo ships use different types of fuel. The most commonly used types are Heavy Fuel Oil (HFO) and Marine Gas Oil (MGO).
However, in an effort to reduce emissions and environmental impact, alternative fuels such as biofuels are being used more frequently. Meanwhile, other environmentally friendly fuels such as hydrogen are still in the development and testing stages.
Types of Cargo Ships
In the shipping and logistics industry, various types of cargo ships are designed to suit the characteristics of the cargo they carry. Each ship has different functions, capacities, and transport systems. The following are some of the most commonly used types of cargo ships:
1. Container Ships
Container ships transport goods packed in containers. This type of ship is one of the most widely used in international trade because the loading and unloading process is fast, practical, and can transport large quantities of cargo.
2. Bulk Carriers
Bulk carriers are specifically designed to carry large quantities of unpackaged cargo, such as coal, wheat, cement, sand, or ore. These ships have large storage holds that facilitate the transport of industrial materials and export commodities.
3. Tanker
Tankers are used to transport liquid cargo, such as crude oil, fuel, liquefied gas, or chemicals. This type of ship is equipped with specialized tanks and safety systems to maintain cargo quality and safety during shipment.
4. Ro-Ro Ship (Roll-on/Roll-off)
A Ro-Ro ship, or roll-on/roll-off ship, is a type of cargo ship used to transport vehicles and wheeled cargo, such as cars, trucks, buses, trailers, and heavy equipment.
These ships are designed with special doors and ramps so that vehicles can enter and exit the ship directly without the need for additional loading and unloading equipment.
5. General Cargo Ships
General cargo ships transport various types of goods in a single shipment, ranging from industrial machinery and construction materials to manufactured products. These ships are more flexible, as they can carry cargo of diverse shapes and sizes.
Read also: What Is an LPG Ship? Understand the Types and Sizes
Functions of Cargo Ships
Cargo ships play a vital role in the distribution of large quantities of goods to various domestic and international regions. Here are some of their functions:
1. Transporting Large Quantities of Goods
The primary function of cargo ships is to transport various types of goods in large volumes via sea routes. From industrial raw materials and manufactured goods to vehicles and essential commodities, these items can be distributed to various regions more efficiently.
2. Supporting Export and Import Activities
Cargo ships play a vital role in international trade, serving as the primary means of shipping goods between countries. Their presence helps facilitate export and import activities, ensuring that global market demands are met.
Read also: Dry Bulk: Types of Cargo and Its Benefits in Logistics
3. Facilitating Interregional Distribution
In addition to international trade, cargo ships are used to distribute goods between islands and regions. This is particularly important for an archipelagic nation like Indonesia, which has extensive maritime distribution routes.
If you require support services in the maritime sector, PT Chandra Daya Investasi Tbk (CDI), through its subsidiary PT Redeco Petrolin Utama (RPU), provides petrochemical raw material ports and storage solutions to assist with your company’s cargo storage and management needs.
Established in 1986, RPU is a liquid bulk product storage terminal company with integrated facilities, including 2 private berths and 70+ multi-specification tanks, serving various oil, chemical, and petrochemical products.
Additionally, CDI, as #YourGrowthPartner, through PT Chandra Shipping International (CSI), also provides marine logistics solutions, such as gas and chemical vessels. These vessels support safe, reliable, and standard-compliant transportation of energy and industrial liquids.
By 2025, CDI, through CSI, had a fleet of more than 10 vessels with a capacity of 4,200–9,600 DWT, including chemical, gas, and crude oil carriers.
How Cargo Ships Operate
Cargo ships operate using a structured system to ensure that the process of transporting goods by sea runs efficiently and on time. Generally, the operation of a cargo ship involves the following steps:
- Loading process at the origin port: Goods are loaded onto the ship using heavy machinery appropriate to the cargo type. Each item is arranged according to its weight, size, and type to maintain the ship’s balance during the journey.
- Cargo arrangement and organization: The cargo is strategically arranged within the ship’s holds, such as cargo holds or containers, to maintain the ship’s stability. This stage is crucial to prevent cargo from shifting when the ship encounters waves or adverse weather conditions.
- Travel and navigation systems: Once loading is complete, the ship sails to the destination port using modern navigation systems. During the journey, the crew monitors the route, weather, and the ship’s condition to ensure safe navigation.
- Monitoring the ship’s and cargo’s condition: The crew periodically checks the ship’s stability, engines, and the condition of the cargo. This is done to minimize the risk of cargo damage or operational disruptions during the shipment.
- Unloading process at the destination port: Upon arrival at the port, the cargo is unloaded using cargo-handling equipment appropriate to the ship's type. After that, the goods are distributed to their final destinations via a land logistics network.
That concludes the information on cargo ships. By understanding its functions and operating principles, you can understand how the maritime logistics system plays a vital role in an interconnected and efficient global supply chain.
If you need reliable port services and storage solutions for petrochemical raw materials, trust CDI to meet your needs!
Read also: Oil Tanker Ship: Definition, Types, and Operations