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Singapore Strait

geography Maturity 11-13 Next article →

The Singapore Strait is a busy waterway in Southeast Asia.

Singapore Strait View from Marina Bay Sands in Singapore
Singapore Strait View from Marina Bay Sands in Singapore

It sits between the Strait of Malacca in the west and the South China Sea in the east. Singapore is located on the northern side of this channel. To the south lie the Indonesian Riau Islands. The two countries share a maritime border along this water. Many small islands are found within the strait.

Aerial perspective of Kusu Island, Singapore. Shot in 2016
Aerial perspective of Kusu Island, Singapore. Shot in 2016

This strait acts as a vital path for global trade. It provides a deepwater passage for the Port of Singapore. This depth is important for very large vessels. In 2017, about 2,000 merchant ships traveled through these waters every single day.

The depth of the strait even limits how large some ships can be. These ships are part of the Malaccamax class. The water must be deep enough for them to pass safely.

History tells us that people have known about these waters for a long time. In the 9th century AD, a Muslim author named Ya'qubi wrote about a "Sea of Salahit." Some think this name refers to Singapore. Others believe it refers to the Malacca Strait. Early European travelers also used the name "Strait of Singapore." This name sometimes meant the whole area or just a part of it.

View from Marina Barrage from Marina East
View from Marina Barrage from Marina East

Historians used many different names for the various straits in old maps.

Defining the exact limits of the strait is a big job. The International Hydrographic Organization sets these boundaries. On the west, the limit connects to the Malacca Strait. On the east, a line joins Tanjong Datok to Pulo Koka. The northern boundary follows the southern shore of Singapore and Johore Shoal. The southern boundary runs from Klein Karimoen along the coasts of Batam and Bintan.

The Singapore Strait overlooking Singapore's southern coastline
The Singapore Strait overlooking Singapore's southern coastline

These lines help sailors know exactly where they are.

Because so many ships pass through, there can be many challenges. During the Second World War, the British mined the strait. More recently, the area has seen issues with piracy and accidents. In 2009, a ship called the Maersk Kendal ran aground on a reef. In 2024, reports showed pirates stealing engine parts from ships. By 2025, there was a major increase in piracy incidents. In that year, over 60% of global piracy happened in the Singapore Strait.

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🖼️ Images & Media (6)
File:East Coast Park 11, Mar 06.JPG
East Coast Park 11, Mar 06.JPG
File:Singapore Strait View from Marina Bay Sands in Singapore.jpg
Singapore Strait View from Marina Bay...
File:View from Marina Barrage from Marina East.jpg
View from Marina Barrage from Marina East.jpg
File:The Singapore Strait overlooking Singapore's southern coastline.jpg
The Singapore Strait overlooking...
File:Aerial panorama of the Singapore Strait and the Pasir Panjang Port Terminal.jpg
Aerial panorama of the Singapore Strait...
File:Aerial perspective of Kusu Island, Singapore. Shot in 2016.jpg
Aerial perspective of Kusu Island,...
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