Beyond the Waiver

A major hurricane has interrupted the U.S. Gulf Coast refinery operations, closed part of a port, and reduced pipeline capacity. Fuel inventories are falling in another region, but the available domestic vessels are already committed or cannot reach the right terminals quickly enough. Within hours, government agencies, carriers, terminal operators, and fuel suppliers must decide whether a temporary Jones Act waiver would help. 

Although this particular scenario is hypothetical, the issues it raises are not. 

In this case, the debate may quickly become a simple yes-or-no question: Should the law be waived, or not? The broader operational issues that this situation surfaces are more difficult.  A waiver may make additional vessels legally available, but it does not create refinery output, open a damaged berth, increase terminal storage, resolve draft restrictions, or guarantee that the right product is in the right place. The real question is not only whether more vessels can be used, but also how the entire transportation network should be coordinated to restore service as quickly and responsibly as possible. 

This is where operations research can change the discussion. Instead of treating a waiver as the solution, analytics can treat it as one decision among many and test whether it improves the overall response. 

The Jones Act  

For more than a century, the Jones Act has shaped domestic maritime transportation in the United States. The law generally requires cargo moving between U.S. points to travel on vessels that are U.S.-built, U.S.-owned, and authorized for coastwise trade. Its purpose extends beyond ordinary transportation economics. The domestic fleet supports American mariners, shipbuilding capability, commercial service, and sealift capacity that may be needed during national emergencies. 

Temporary waivers have been used in exceptional circumstances. Past examples include fuel movements after Hurricanes Katrina, Sandy, Harvey, Irma, and Maria. These actions were limited responses to disruptions rather than permanent changes to maritime policy. 

“A network optimization model can represent the emergency as a connected system rather than a collection of separate vessel requests.” 

That history reflects two legitimate priorities. The United States has an interest in maintaining a capable domestic maritime sector. But communities and businesses also need reliable access to fuel and other essential goods during emergencies. The challenge is not to choose one priority and ignore the other. It is to determine when temporary flexibility produces a measurable public benefit, how narrowly it should be applied, and when normal operations can resume. 

Those are decision questions, and decision questions are where operations research is most useful. 

The Real Bottleneck 

Emergency logistics systems often fail at their tightest constraint. That constraint may be vessel capacity, but it may also be a closed channel, a damaged loading rack, limited storage, an unavailable crew, a shortage of a specific fuel grade, or congestion on the roads and rail lines leaving a destination port. 

Consider a foreign-flag tanker that becomes available after a waiver. It may carry more cargo than the domestic alternatives, but its size could prevent it from entering a shallow port. The receiving terminal may not have enough open storage. The terminal may accept crude oil but not refined products. A delivery that looks attractive at sea may create a queue at the berth or shift congestion inland. Several smaller domestic vessels may provide faster and more reliable service because they can call at multiple ports and use existing terminal schedules. 

A sound analysis therefore begins before the waiver decision. It asks: What outcome are we trying to protect? Which regions face the highest shortage risk? What capacity is genuinely available? Where will the next bottleneck appear if one constraint is relaxed?

A New Model

A network optimization model can represent the emergency as a connected system rather than a collection of separate vessel requests. Ports, refineries, storage terminals, and demand regions become points in the network. Vessels, pipelines, railroads, trucks, and barges become the routes that connect them. The model then evaluates many feasible combinations of movements while respecting real operating limits. 

The inputs do not need to be exotic. Decision-makers already collect much of the required information: available inventories, product demand, vessel locations, cargo compatibility, sailing times, berth windows, terminal unloading rates, port restrictions, pipeline capacity, and estimated restoration times. The model can also distinguish between domestic vessels and vessels that would become eligible only under a waiver. 

“Scenario analysis allows planners to test these possibilities before committing to a response.” 

The objective should reflect the emergency, not just transportation costs. During a fuel shortage, the first priority may be reducing the number of days that hospitals, utilities, airports, and communities remain below critical inventory levels. During disaster recovery, the model may prioritize delivery speed and service continuity. Cost still matters, but a least-cost plan is not useful if it delivers essential cargo too late. 

The model can also protect policy objectives. It can prioritize available coastwise-qualified vessels, use waived capacity only where a documented gap remains, limit the duration or geographic scope of the waiver, and estimate when domestic capacity can again meet demand. This produces a more disciplined answer than either assuming a waiver is always necessary or refusing to consider one under any condition.

Testing Options

The most useful analysis would compare several response plans side by side. The first plan would establish the baseline: what happens if the system continues with currently available domestic capacity? This reveals expected shortages, delays, and recovery time without a waiver. 

The second plan would test operational changes that do not require a waiver. Cargoes could be reassigned among domestic vessels, port calls could be re-sequenced, inventories could be shared across terminals, and rail or truck movements could supplement maritime capacity. Sometimes coordination, rather than vessel scarcity, is the main problem. 

The third plan would introduce specific waiver options. Instead of modeling an unlimited waiver, analysts could test one vessel, one cargo, one route, or a limited time period. The model would show exactly how much shortage reduction or recovery improvement each option creates. If adding a vessel produces little benefit because the destination terminal is constrained, decision makers would know that the waiver is unlikely to solve the problem. 

The final plan would test combined actions. A narrowly defined waiver may work best when paired with temporary storage, extended terminal hours, priority berth access, or additional inland transportation. Operations research makes these interactions visible. 

Planning for Uncertainty

Emergency decisions are made with incomplete and changing information. A port expected to reopen tomorrow may remain closed for three more days. Demand may rise because consumers begin panic buying. A refinery may restart at only part of its normal capacity. Weather may delay the vessel selected in the original plan. 

Scenario analysis allows planners to test these possibilities before committing to a response. One scenario might assume a rapid recovery. Another might assume that port and refinery disruptions continue for a week. A third could combine lower supply with higher-than-expected demand. If the same action performs reasonably well across several scenarios, it is more dependable than a plan that works only when every forecast is correct. 

“A resilient system needs domestic capability, but it also needs a disciplined way to respond when normal capacity cannot meet an urgent national need.” 

Simulation adds another layer. Rather than calculating a single outcome, it can estimate a range of likely delivery times, inventory levels, and congestion conditions. Decision-makers can then see not only the expected result, but also the risk of a severe shortage or delay. 

This is especially important when the consequences are uneven. A plan that maintains average regional supply may still leave an island community, remote area, or critical facility exposed. Analytics can identify these distributional effects and ensure that a response is evaluated by service reliability rather solely by total cargo moved.

A Maritime “Digital Twin”

The same framework can become more useful when connected to live operational data. A maritime digital twin is a continuously updated representation of the transportation network. It can combine vessel positions, port status, terminal capacity, weather, inventories, and demand forecasts in one decision environment. 

During an emergency, planners could update the model as conditions change. If a port reopens, a vessel is delayed, or a terminal reaches capacity, the system could recalculate the response and recommend a new sequence of movements. The purpose is not to replace human judgment, but to give agencies and operators a shared view of the network and reduce the time spent reconciling separate spreadsheets, phone calls, and assumptions. 

A digital twin could also improve preparedness before the next disaster. Agencies could run exercises involving hurricanes, cyber incidents, refinery outages, geopolitical disruptions, or simultaneous failures at multiple ports. These exercises would reveal where additional storage, vessel capacity, data sharing, or infrastructure investment could create the greatest resilience benefit.

Better Waiver Decisions

A transparent analytical framework could make waiver decisions faster, narrower, and easier to explain. A request could be evaluated against a consistent set of questions: Is coastwise-qualified capacity available? Can it meet the required delivery window? What shortages may occur without additional capacity? What measurable improvement would the proposed waiver produce? Are ports and terminals able to use the added vessel? Is there a smaller intervention that achieves the same result? 

The output should not be a black-box recommendation. It should show the assumptions, constraints, trade-offs, and sensitivity of the result. Government agencies, domestic carriers, cargo owners, ports, and emergency managers may disagree about policy, but they can still benefit from a common operational picture. 

This approach can also strengthen the domestic maritime system. If repeated analyses show that certain vessel types, routes, or regions lack sufficient capacity during emergencies, that information can guide long-term investment. The lesson from a waiver request may be that the country needs more product tankers, greater terminal flexibility, additional fuel storage, or better coordination across transportation modes.

Beyond the Waiver

The Jones Act debate is often framed as a contest between maritime protection and supply chain flexibility. Emergency logistics does not fit neatly into that argument. A resilient system needs domestic capability, but it also needs a disciplined way to respond when normal capacity cannot meet an urgent national need.
 
Operations research provides that discipline. Network optimization can identify the true constraint. Scenario analysis can test whether a plan survives uncertainty. Simulation can reveal the risk hidden behind an average forecast. A digital twin can help agencies and operators adjust as the disruption unfolds. 

A waiver may sometimes be part of the best response, and sometimes it may add little value. The important point is that the decision should be supported by evidence that looks across the whole network. The goal is not simply to move more cargo. It is to restore essential service quickly, use scarce assets wisely, protect vulnerable communities, and preserve the maritime capability the nation will need for the next emergency. 

The next time a disruption brings the Jones Act into the national conversation, the United States should be ready with more than a legal debate. It should be ready with a tested decision system.