Malaccamax is a naval architecture term for the largest size of ship capable of fitting through the 25-metre-deep (82 ft) Strait of Malacca. Bulk carriers and supertankers have been built to this size, and the term is chosen for very large crude carriers (VLCC). They can transport oil from Arabia to China. Typical Malaccamax tanker can have a maximum length of 333 m, beam of 60 m, draught of 20.5 m, and tonnage of 300,000 DWT.
Similar terms of Panamax, Suezmax and Seawaymax are used for the largest ships capable of fitting through the Panama Canal, the Suez Canal and Saint Lawrence Seaway, respectively. Aframax tankers are those with a deadweight tonnage of 80,000 to 120,000.
Any post-Malaccamax ship would need to use even longer alternate routes because traditional seaways such as the Sunda Strait, between the Indonesian islands of Java and Sumatra would become too shallow for such large bulk carriers. Other routes would therefore be required:
- Lombok Strait, Makassar Strait, Sibutu Passage and Mindoro Strait
- Ombai Strait, Banda Sea, Lifamatola Strait between the Sula Islands and Obi Islands, and Molucca Sea
- around Australia
Artificially excavated new routes might also be a possibility:
- deepening the Strait of Malacca, specifically at its minimum depth in the Singapore Strait,
- the proposed Kra Canal, which however would take much more excavation.
- "Malacca-max Oil Tanker Delivered" (Press release). NKK Corporation. September 2002.
- Fukai, Takashi; Kuma, Yasumitsu; Tabira, Makoto. "Development of Malaccamax Very Large Crude-oil Carriers". Mitsubishi Heavy Industries Technical Review. Retrieved 9 June 2014.
- Pleistocene Sea Level Maps: Southeast Asia and Sundaland
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