Bab el-Mandeb

Binding·Constraint: Routing diversion around a war-risk insurance zone·Alternative: None recorded

The passage stays open; political risk decides who pays to cross.

What constrains it

Bab el-Mandeb is not rationed by draft or a lack of navigable water. Perim, or Mayun, Island divides the passage between Yemen and Djibouti and Eritrea, leaving commercial shipping dependent on the wider western channel. The binding constraint is political control from Yemen's Houthi forces and the resulting risk of attack, seizure, or misidentification. Deliberate targeting and conflict-related damage threaten commercial shipping in the Southern Red Sea and Bab el-Mandeb.

Rationing mechanism

No authority auctions slots or assigns a compulsory convoy schedule. Access is rationed through war-risk pricing, security requirements, reporting to UKMTO, and the private decision to avoid the passage altogether. Risk-mitigation measures matter before entry into the Southern Red Sea, Bab el-Mandeb, and Gulf of Aden. A ship with acceptable insurance, security arrangements, and cargo exposure can cross; another operator is pushed around the Cape of Good Hope.

Incidence

Container and tanker operatorsThey absorb longer voyages, added fuel use, crew exposure, and disrupted schedules when the security risk makes the direct Red Sea route unacceptable.

Marine war-risk insurersUnderwriters carry the possibility of missile damage, boarding, or seizure and ration access by charging for the vessel, cargo, flag, and route exposure.

European importersManufacturers and retailers receiving Asian cargo face delayed replenishment and higher freight costs when ships choose the longer route around Africa.

Yemen's Houthi forcesTheir control of the threat environment gives them the power to make a nominally open waterway commercially unusable without physically closing either channel.

Comparable passagesUnlike Panama, where an authority rations scarce freshwater capacity by slot, Bab el-Mandeb is rationed by armed political control and private war-risk decisions; who decides remains the most useful comparison.