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Singapore Strait

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The Singapore Strait is a vital maritime waterway located in Southeast Asia.

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

It serves as a critical link between the Strait of Malacca to the west and the South China Sea to the east. The strait functions as a major channel for global shipping and trade. Singapore sits on the northern side of this waterway. To the south lie the Indonesian Riau Islands. The two nations share a maritime border along this specific stretch of water. This strait includes Keppel Harbour and numerous small islands.

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

This waterway is essential for the Port of Singapore. The strait provides a deepwater passage for many large vessels. The specific depth of the strait is a very important factor for shipping. It limits the maximum draft of vessels traveling through the Straits of Malacca. This depth also affects the Malaccamax ship class. These are ships designed to fit specific maritime dimensions. Because of its depth and location, the strait is incredibly busy. In 2017, approximately 2,000 merchant ships traversed these waters every single day.

Historians have studied the names and maps of this region for centuries. In the 9th century AD, a Muslim author named Ya'qubi wrote about the Bahr Salahit. This name translates to the Sea of Salahit. The word "selat" is Malay for strait. Some historians believe the Sea of Salahit refers to Singapore. Others argue it refers to the Malacca Strait. This area was a point of contact between Arabs and the Zābaj. Early European travelers also used the name "Strait of Singapore." However, their usage was often unclear and varied greatly.

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

In older texts, historians often used the plural term "Singapore Straits." This term referred to several different bodies of water. The Old Strait of Singapore sat between Sentosa and Telok Blangah. There was also a New Strait of Singapore southwest of Sentosa. Another area was called the "Governor's Strait" or the "Strait of John de Silva." This corresponds to the Phillip Channel. Finally, the Tebrau Strait was also part of these historical records. Today, the term refers specifically to the main channel south of Singapore. This is where the international border with Indonesia is located.

The International Hydrographic Organization defines the exact limits of the strait. These boundaries help sailors navigate the complex waters safely. The western limit joins Tanjong Piai to The Brothers and Klein Karimoen. The eastern limit connects Tanjong Datok to Pulo Koka via Horsburgh Reef. The northern boundary follows the southern shore of Singapore and Johore Shoal. The southern boundary runs from Klein Karimoen to Pulo Koka. It follows the northern coasts of Batam and Bintan Islands.

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

Because the strait is a major shipping lane, it faces many challenges. During the Second World War, the British mined the strait. The area also experiences maritime accidents and piracy. In 2009, the Maersk Kendal grounded on the Monggok Sebarok reef. Piracy has also become a significant concern for maritime security. In 2024, ReCAAP reported a unique type of piracy in these waters. Pirates targeted and stole engine spares from ships. This activity suggested the existence of a black market for parts.

East Coast Park 11, Mar 06
East Coast Park 11, Mar 06

Recent data shows a sharp increase in maritime crime in the region. In 2025, the International Maritime Bureau (IMB) reported a major rise in piracy. These incidents included boardings and violent armed robberies of cargo ships. The scale of this activity is quite large. In 2025, over 60% of global piracy occurred in the Singapore Strait. This high percentage highlights the strait's importance and its vulnerability. Managing the safety of this waterway remains a critical task for the surrounding nations.

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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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