The Suez Paradox: Why the Canal is Empty While Bab el-Mandeb is Blocked

An analysis of why Suez Canal traffic can appear light or diverted while the Bab el-Mandeb strait is congested or effectively closed, exploring the economic, security, and operational causes behind this seeming contradiction.

The phrase "Suez Paradox" describes an apparent contradiction in global shipping patterns: the Suez Canal—one of the world's major maritime shortcuts—appears unusually empty or underutilized at the same time that the Bab el-Mandeb strait, the southern gateway to the Red Sea, is blocked or rendered risky. At face value this looks illogical, because ships that cannot pass through Bab el-Mandeb cannot reach the Suez Canal. The reality is a set of interconnected economic, security, and operational decisions that explain why traffic patterns can produce this effect.

Core dynamics that create the paradox

• Risk-driven rerouting: When Bab el-Mandeb becomes a security hotspot—owing to armed conflict, terrorist or insurgent attacks, or episodic piracy—shipowners and operators assess the risk of transiting the Red Sea corridor. High risk leads many carriers to choose the southern alternative: sailing around the Cape of Good Hope. That route entirely bypasses the Red Sea and Suez Canal, removing traffic that would otherwise queue to enter or leave Suez.
• Time-versus-cost trade-offs: The Cape route is longer and increases fuel, crew, and time costs, but it avoids war-risk insurance premiums, potential vessel damage, or seizure. For some shipments and carriers, predictable longer transit time with lower security risk and stable insurance underwriting is preferable to the uncertainty and cost spikes of Red Sea transits. That decision reduces immediate demand for Suez transits.
• Insurance and war-risk premiums: The financial impact of operating through a contested corridor can be dramatic. War-risk and kidnap-and-ransom insurance premiums can spike, and fixed costs like Suez Canal tolls still apply. When premiums and potential rerouting costs rise enough, operators elect to detour, which diminishes the Suez traffic pool despite a localized blockage at Bab el-Mandeb.
• Convoy and naval protection constraints: Maritime security measures—escorts, convoys, and restrictions on unescorted transits—introduce scheduling friction. If naval protection is limited or only available intermittently, shippers delay or reroute. Limited protection can mean a temporary closure of the effective corridor for commercial traffic, again shifting vessels away from the Suez route.
• Cargo prioritization and supply-chain adjustments: Not all cargoes justify extended detours. Time-sensitive, high-value shipments may be rerouted via air freight or transshipped through alternative hubs. Bulk commodities may tolerate longer sea journeys. These adjustments change the composition of vessels using Suez even if a portion of traffic appears absent.
• Local chokepoint logistics: Even when Bab el-Mandeb is partially blocked, local naval efforts and port operations can absorb or delay transits, creating temporary congestion in the Gulf of Aden or at nearby ports without producing an immediate Suez queue. In contrast, if large numbers of vessels preemptively avoid the entire Red Sea, Suez may see fewer arrivals, creating the empty-canal impression.

Historical and recent examples

Past incidents illustrate these dynamics. The 2021 Ever Given grounding in the Suez Canal caused a direct queue of vessels and visible congestion at both ends of the canal. By contrast, armed attacks and threats in the Red Sea region—such as periodic Somali piracy in the late 2000s and, more recently, attacks attributed to armed groups operating in Yemen’s vicinity—have prompted many carriers to reroute south around Africa to avoid the corridor entirely. That rerouting reduces the number of ships approaching the Suez Canal even while Bab el-Mandeb remains contested.

Operational considerations for stakeholders

• Shippers and carriers: Must weigh fuel and time penalties against insurance and security risk. Large liner operators use network planning: if a critical mass reroutes, carriers may temporarily suspend some Suez-serving strings because they are no longer commercially viable.
• Terminal operators and ports: Changes in route choices can produce sudden capacity shifts. Ports near the Cape of Good Hope or alternative transshipment hubs may see traffic spikes, while Suez-adjacent ports may face reduced volumes and idled labor capacity.
• Insurers and underwriters: Rapidly adjust premiums to reflect on-the-ground risk. High premiums can be a tipping point that causes routes to empty out as operators avoid incurring war-risk expenses.
• National authorities and navies: Maritime security operations can restore confidence, but they require coordination and time. Temporary convoys help, but their limited capacity can produce scheduling delays that disincentivize transit.

Why it is not truly paradoxical

Labeling the pattern a paradox is useful rhetorically, but the behavior follows predictable economic and risk-management logic. The apparent contradiction arises because the maritime system does not respond to a single blocked chokepoint in isolation—actors evaluate the entire route network, insurance and operating costs, potential delays, and reputational risk. When the perceived or real hazard at Bab el-Mandeb rises above a threshold, the rational response for many operators is to avoid the region entirely. The Suez Canal then becomes a victim of that larger routing decision; it can look underused not because it is less efficient, but because ships have chosen not to approach it.

Practical implications

• Expect volatility in transit volumes when regional security deteriorates: quick swings in demand for Suez services, toll revenues, and port throughput are common.
• Supply chains that rely on predictable transit times must plan contingencies—longer routing, inventory buffers, or modal shifts—to maintain service levels.
• Long-term solutions require political stability, effective maritime security coordination, and insurance market adjustments that reflect reduced and predictable risk.

In summary, the "Suez Paradox" is a reflection of how modern maritime decision-making blends security, insurance, operational capacity, and economics. When Bab el-Mandeb is unsafe or blocked, the predictable corporate and governmental responses can leave the Suez Canal looking empty—not because the canal is failing, but because the global fleet has rationally chosen alternate paths.