Comparing the deviations of shipping routes between three major container ports (Shanghai, Rotterdam, and New York), the main connecting alternatives are limited. The Cape of Good Hope deviation adds 7 to 10 days on Asia-Europe routes (Shanghai to Rotterdam) and about 5 days to connect Shanghai and New York through the Cape Route instead of the Suez Route (using 16 knots as the reference speed). Landbridge issues are also discussed. Follow the link for a more comprehensive discussion on the impacts on maritime supply chains and a high-quality version of the map.
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