Strait of Malacca

The Strait of Malacca is a narrow stretch of water, about 900 kilometres long and from 65 to 250 kilometres wide. It lies between the Malay Peninsula to the northeast and the Indonesian island of Sumatra to the southwest, connecting the Andaman Sea and the South China Sea.

Because it links the Indian and Pacific oceans, the Strait of Malacca is one of the busiest shipping routes in the world. Each year, over 94,000 ships pass through, carrying important goods like oil, manufactured products, coal, palm oil, and Indonesian coffee. This makes it very important for global trade.

Historically, controlling the strait has been important for trade. Powerful states such as the Srivijaya empire, the Malacca Sultanate, the Johor Sultanate, the British Straits Settlements, and the city-state of Singapore have all sought to control this key area.

Etymology

The name "Malacca" comes from the Malacca tree, also called the Indian gooseberry tree. A prince named Parameswara, from Sumatra, chose this place to start his new kingdom. He named it "Melaka" after the tree where he rested. Over time, the name "Malacca" grew to mean the important waterway between the Malay Peninsula and the Indonesian island of Sumatra, called the Malacca Strait.

Extent

The International Hydrographic Organization defines the limits of the Strait of Malacca in a specific way.

The strait is bordered by land on both sides. On the west, it is defined by a line from Pedropunt, the northernmost point of Sumatra, to Lem Voalan, the southern end of Goh Puket [Phromthep Cape on Phuket Island] in Thailand.

On the east, the border is a line from Tanjong Piai (Bulus), the southern end of the Malay Peninsula, passing through The Brothers, and ending at Klein Karimoen.

The northern border is the southwestern coast of the Malay Peninsula, and the southern border follows the northeastern coast of Sumatra to Tanjong Kedabu, then to Klein Karimoen.

History

Early traders from Arabia, Africa, India, and Persia reached Kedah before continuing to Guangzhou. Kedah was an important western port on the Malay Peninsula. These traders exchanged items like glassware, camphor, cotton goods, brocades, ivory, sandalwood, perfume, and precious stones. They sailed to Kedah using the monsoon winds between June and November and returned between December and May. Kedah helped by providing places to stay, porters, small boats, bamboo rafts, elephants, and collecting taxes for goods transported over land to eastern ports like Langkasuka and Kelantan.

Later, ships from China also began trading at these ports. In the 7th century, the maritime empire of Srivijaya, based in Palembang, Sumatra, grew powerful. It controlled important sea routes, including the Strait of Malacca and the Sunda Strait, ensuring its dominance for about 700 years. The strait became a key trade route between India and China, a role it kept through later periods, including the time of the Malacca Sultanate, the Johor Sultanate, the Straits Settlements, and modern Singapore.

Economic importance

The Strait of Malacca is one of the most important shipping lanes in the world. It connects the Indian Ocean and the Pacific Ocean, linking many Asian countries like Thailand, Indonesia, Malaysia, the Philippines, Singapore, Vietnam, China, Japan, Taiwan, and South Korea.

Each year, over 94,000 ships pass through the strait, carrying about 25% of the world's traded goods. These include oil, products made in China, coal, palm oil, and Indonesian coffee. The strait is very busy and narrow in some places, which can cause traffic problems for ships. Because of this, some countries, especially China, worry about what might happen if shipping were to stop there.

United Nations Convention on the Law of the Sea

The United Nations Convention on the Law of the Sea (UNCLOS) says that each country next to the water can control the area up to 12 nautical miles from its coast. This rule about sea borders has sometimes caused problems in the Strait of Malacca. For example, in the 1990s and 2000s, some bad actions happened in Indonesia's waters. Because Indonesia did not have enough help to stop these actions, the different countries around the strait had more disagreements. This made it simpler for bad people to move between borders to avoid being caught.

Present-day maritime security

The Strait of Malacca is very important for global trade, so keeping it safe matters to many countries, not just those nearby. Threats like piracy, smuggling, and tensions between countries can affect the area. While some of these issues have gotten better, others still need attention, especially working together and protecting the environment.

In 2005, the Strait of Malacca and the Strait of Singapore were called high-risk areas because of attacks on ships. This label was removed later because of better teamwork and navy patrols. But in January 2025, reports said that big safety risks for ships had gone up again. Ships are still told to take proper safety steps when passing through.

International cooperation

Countries around the Strait of Malacca sometimes find it hard to share control of their waters while also working together to keep the area safe. They want to make sure ships can pass safely without interference.

Several groups help countries work together. The Malacca Strait Patrols, started in 2004, brings together Indonesia, Singapore, Malaysia, and Thailand to share information and patrol together. MALSINDO is an agreement between the three countries bordering the strait to stop pirates by patrolling together. There is also a larger agreement in Asia to share information and build capacity to fight piracy and robbery on ships. Regional Cooperation Agreement on Combating Piracy and Armed Robbery against Ships in Asia

Shipping hazards

See also: Piracy in the Strait of Malacca

Piracy has been a concern in the strait, especially in the 2000s. After some attacks in 2004, nearby navies increased their patrols, and pirate attacks dropped sharply.

There are many old shipwrecks in the busy shipping channel, which can make it hard for ships to avoid collisions.

Another risk is thick haze from wildfires on nearby islands, which can make it very hard to see and force ships to slow down. The strait is also used by very large ships, making it even busier.