Rising Ship Traffic Off South Africa Due To Middle East Conflict Increases Risk To Whales, Scientists Say
12 May 2026

The increase in rerouted shipping began after Houthis hijacked the British-owned vehicle carrier Galaxy Leader near Yemen in November 2023.
The ongoing geopolitical instability in the Red Sea, triggered by the November 2023 hijacking of the Galaxy Leader by Houthi militants, has forced a massive rerouting of global shipping around the Cape of Good Hope. This surge in vessel traffic off the coast of South Africa has raised significant environmental alarms, as scientists warn of an increased collision risk for migrating whale populations. As merchant vessels bypass the Suez Canal, the concentrated maritime activity threatens critical marine biodiversity hotspots near major bunkering hubs.
From a regulatory perspective, this shift in traffic patterns necessitates strict adherence to IMO guidelines on ship strikes, specifically those outlined in the MEPC.1/Circ.833 circular regarding the reduction of underwater noise and collision risks. While SOLAS Chapter V, Regulation 34 remains the primary mandate for safe navigation, compliance departments must now integrate whale migration data into voyage planning. Failure to account for these environmental sensitivities could lead to violations of MARPOL Annex VI standards concerning vessel efficiency and potential scrutiny from classification societies like DNV or Lloyd’s Register.
Navigating officers and masters must now prioritize enhanced bridge watchkeeping and active whale detection protocols during transits around South Africa. It is essential to maintain a vigilant lookout and adjust vessel speeds in accordance with voluntary speed reduction zones to minimize strike risks. By integrating real-time marine mammal sighting reports into daily passage plans, navigating officers can ensure operational safety while upholding environmental stewardship standards during these high-traffic rerouted voyages.
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