For months, the international energy industry has been solving an enormous problem.

If oil cannot safely move through the Strait of Hormuz, find another way.

Saudi Arabia moved more crude westwards across the Arabian Peninsula towards the Red Sea.

The United Arab Emirates used its pipeline to Fujairah on the Gulf of Oman.

Tankers performed ship-to-ship transfers outside the most dangerous waters.

Asian refiners found replacement crude.

Iraq began developing additional export options.

It has been expensive, inefficient and complicated.

But it worked.

The world demonstrated that even severe disruption to the Strait of Hormuz did not necessarily mean Middle Eastern oil was trapped inside the Gulf.

Now Iran has issued a threat that potentially changes that calculation.

Iran's newly appointed security chief, Mohsen Rezaei, has warned neighbouring countries that if they participate in the United States' economic campaign against Tehran, Iran is prepared to retaliate against alternative oil transportation routes outside Hormuz.

That is an important escalation.

Iran is effectively saying that bypassing Hormuz may not protect Gulf oil exports if neighbouring countries participate in Washington's attempt to economically isolate Tehran.

For Australia, the implications are clear.

We have spent months worrying about whether oil can get through Hormuz.

The next question may be considerably more troubling:

Can Middle Eastern oil get out safely by any route?

The bypasses have kept the system functioning

The importance of the alternative routes cannot be overstated.

Before the war, enormous volumes of Gulf petroleum travelled through Hormuz because it was the simplest and most economical route between producers and international customers.

When that system broke down, geography suddenly became enormously important.

Saudi Arabia and the UAE possessed something many other Gulf producers did not.

Alternatives.

Saudi Arabia's East-West pipeline allows crude produced near the Gulf to travel across the country towards the Red Sea.

The UAE's pipeline system allows crude to reach Fujairah, outside Hormuz.

Those routes cannot replace all the oil normally passing through the Strait.

But they provide critical redundancy.

Reuters estimates Middle Eastern oil exports averaged about 9.5 million barrels a day during August, less than half their 2025 level, despite increased exports through Fujairah and Saudi Arabia's Red Sea coast.

Without those alternatives, the global supply shock could have been substantially worse.

But the Red Sea route is already under pressure

There is another problem.

Moving Saudi crude towards the Red Sea avoids Hormuz.

It does not avoid geopolitical risk.

Yemen's Iran-backed Houthis have imposed restrictions affecting Saudi exports through the Bab el-Mandeb Strait at the southern entrance to the Red Sea.

Reuters reports this has already put pressure on the very alternative routes being used to compensate for reduced Hormuz traffic.

The geography is unforgiving.

Avoid one chokepoint and the tanker may encounter another.

That has been one of the defining characteristics of this crisis.

Fujairah is the other great escape route

The UAE's position is different.

Its pipeline to Fujairah reaches the Gulf of Oman without requiring crude to travel through Hormuz.

That makes Fujairah one of the most strategically important pieces of petroleum infrastructure in the region.

It has also become increasingly important to China.

Major Chinese state-owned shipping companies have stopped sending their own tankers through Hormuz and Bab el-Mandeb. Instead, they have increasingly collected crude outside the Gulf through ship-to-ship transfers around Fujairah and Oman.

That system keeps Middle Eastern oil moving towards Asia.

And that matters to Australia.

Australia sits downstream

Australia's vulnerability is not primarily about importing Iranian crude.

It is about the regional petroleum system.

Australia imports most of the refined petroleum products it consumes.

Asian refineries provide petrol, diesel and aviation fuel to markets throughout the region.

Those refineries need crude.

The more successfully Gulf producers can move crude through alternative routes, the more resilient Asian refining becomes.

That helps protect Australian supply.

Threaten those routes and the protection weakens.

Iran's warning therefore matters

Rezaei's warning should not be confused with an actual attack.

That distinction is essential.

Iran has threatened alternative oil transportation routes if neighbouring countries cooperate with US economic measures.

It has not thereby disabled those routes.

But shipping and energy markets price risk before infrastructure is destroyed.

Shipowners reconsider voyages.

Insurers reconsider premiums.

Traders reassess contracts.

Governments reassess security.

Oil companies reconsider where they load cargoes.

A credible threat has an economic cost even when no missile is fired.

Oil is already expensive

Brent crude settled on Friday at US$94.39 a barrel.

It gained about 6.4 per cent over the week, while West Texas Intermediate gained approximately 5.7 per cent.

The increases reflected escalating US-Iran tensions and expectations of tighter supply as Washington prepares stronger economic pressure against Tehran and its trading relationships.

Those prices are already flowing through the international petroleum system.

But the crude benchmark tells only part of Australia's story.

Freight matters.

Insurance matters.

Refining margins matter.

The Australian dollar matters.

Diesel and jet-fuel availability matter.

A barrel of crude at US$94 is only the beginning of the Australian fuel calculation.

The danger is simultaneous disruption

This is what makes Iran's latest warning particularly significant.

The international petroleum system can tolerate the failure of one route if sufficient alternatives remain.

Hormuz becomes dangerous?

Use Fujairah.

Fujairah becomes constrained?

Use Saudi Arabia's Red Sea infrastructure.

Middle Eastern supply becomes insufficient?

Buy American, Russian, Brazilian or African crude.

That is resilience.

The danger increases dramatically when several alternatives become constrained simultaneously.

The world's spare routes are not unlimited

Alternative routes have physical capacity limits.

Pipelines can move only so many barrels.

Ports can load only so many ships.

Tankers can carry only so much crude.

Refineries can process only particular grades efficiently.

And longer voyages consume shipping capacity.

That is why there is no single switch the world can flick to replace Hormuz.

The workaround is actually a collection of imperfect solutions.

Iran is now threatening that collection.

There is an important distinction between oil existing and oil being accessible

The world is not running out of petroleum.

There are enormous reserves.

The problem is getting the right oil to the right refinery at the right time and at an economically tolerable price.

That distinction has defined the Iran crisis.

Saudi Arabia can possess millions of barrels of crude.

If the route from the oilfield to the customer is unsafe, that crude becomes less useful.

The same applies to Iraq, the UAE and other producers.

Energy security is therefore partly about production.

But it is also about logistics.

The logistics have become extraordinarily expensive

Chinese shipping provides an excellent example.

Reuters reports freight rates between Oman and China have reached around US$140,000 per vessel per day, approximately four times earlier levels, as Chinese state operators avoid the principal Gulf chokepoints.

The oil can still reach China.

But it costs much more to move.

That difference matters.

A supply chain can be functioning and simultaneously be economically damaged.

Australia is experiencing precisely that problem.

This is why Australian fuel can remain expensive even when oil is available

Consumers understandably look at crude prices and expect an immediate relationship with petrol prices.

The actual chain is much longer.

Crude has to be purchased.

Transported.

Insured.

Refined.

Stored.

Transported again.

Imported into Australia.

Distributed domestically.

Each stage has a cost.

The Iran conflict has increased several of those costs simultaneously.

Threatening alternative shipping routes potentially increases them again.

Diesel remains particularly important

For Australia, diesel deserves special attention.

Diesel powers road freight, agriculture, mining, construction and heavy equipment.

Its economic influence extends well beyond people driving diesel vehicles.

A truck operator facing persistently higher fuel costs eventually has to recover them.

A farmer facing higher diesel costs has higher production expenses.

A mining operation pays more to move material.

A construction company pays more to operate machinery.

Those costs work their way through the economy.

And that becomes inflation

This is how an international conflict thousands of kilometres from Australia can influence Australian monetary policy.

Higher fuel costs raise transport expenses.

Transport affects almost everything.

Food has to move.

Building materials have to move.

Retail products have to move.

Workers have to travel.

Aircraft need fuel.

Businesses eventually attempt to recover some of those expenses through prices.

The initial oil shock becomes a broader inflation problem.

The Reserve Bank cannot reopen an oil route

That creates an uncomfortable problem for monetary policy.

The Reserve Bank of Australia cannot protect Fujairah.

It cannot secure Bab el-Mandeb.

It cannot reopen Hormuz.

It cannot increase Saudi pipeline capacity.

It cannot create another oil tanker.

Interest rates do not solve any of those physical problems.

But if higher energy costs become embedded in Australian inflation, the RBA still has to consider the consequences.

That is the danger of imported supply-side inflation.

Australia therefore has an interest in redundancy

There is a direct policy lesson.

Australia cannot eliminate its exposure to international petroleum markets quickly.

Nor would complete energy isolation necessarily be economically sensible.

But Australia can reduce the consequences of disruption.

Strategic fuel stocks provide time.

Domestic refining provides capability.

Multiple international suppliers reduce dependence upon one source.

Alternative fuels can reduce petroleum demand in particular applications.

Electrification reduces liquid-fuel consumption where technically and economically practical.

None is a complete answer.

Together they provide resilience.

Saudi Arabia learned that lesson decades ago

The Saudi East-West pipeline exists because dependence upon Hormuz has always presented strategic risk.

The infrastructure transports crude from eastern Saudi Arabia across the country towards the Red Sea.

In ordinary times, that redundancy can appear inefficient compared with simply loading tankers in the Gulf.

During a Hormuz crisis, its value changes completely.

The Iran war has transformed redundant infrastructure into strategic infrastructure.

That is a lesson Australia should understand.

The UAE learned it too

The same applies to Fujairah.

Its strategic value lies principally in geography.

It is on the correct side of Hormuz.

That simple fact has become extraordinarily valuable.

The UAE can export significant quantities of crude without requiring the tanker carrying it to traverse the Strait.

Again, infrastructure built before the emergency provides options during the emergency.

Iran understands precisely why these routes matter

That is why Rezaei's threat deserves attention.

Threatening the alternatives attacks the logic of redundancy itself.

If Gulf states believe cooperation with Washington could expose their alternative petroleum infrastructure to Iranian retaliation, they face a difficult choice.

Support US economic pressure on Tehran and potentially increase the risk to their own exports.

Or maintain distance from Washington's measures and preserve whatever accommodation with Iran remains possible.

That gives Tehran leverage.

This follows Iran's selective opening to Iraq

The development becomes even more interesting when considered alongside Iran's decision to permit selected Iraqi oil tankers to pass through Hormuz.

Iran is simultaneously demonstrating two capabilities.

It can make oil movement easier for a neighbour with which it reaches an accommodation.

And it can threaten to make oil movement harder for neighbours cooperating with Washington.

That suggests Hormuz and the wider Gulf energy network are becoming instruments of economic diplomacy.

Oil routes themselves are part of the negotiation.

France and Saudi Arabia are already thinking further ahead

France and Saudi Arabia are discussing additional trade routes intended to strengthen connectivity between the Middle East and Europe while reducing exposure to Hormuz disruption, according to reporting on the latest regional diplomatic developments.

That reinforces a theme running throughout this crisis.

Governments no longer assume the old energy geography will simply return.

They are planning alternatives.

New pipelines.

New ports.

New corridors.

New commercial relationships.

The longer the conflict continues, the more permanent those changes may become.

There is a possible positive outcome

Iran's warning does not necessarily mean attacks will follow.

Threats can be bargaining instruments.

The objective may be to discourage Gulf neighbours from participating in Washington's new economic campaign rather than actually destroying their petroleum infrastructure.

That distinction matters enormously.

Iran itself has strong incentives to avoid a regional escalation that turns neighbouring states decisively against it.

Diplomacy therefore remains possible.

But markets cannot assume the best outcome.

The next development to watch is physical

We should now distinguish rhetoric from action.

The important indicators are straightforward.

Do attacks occur against pipelines, pumping stations, ports or tankers serving alternative routes?

Does shipping insurance rise further?

Do tankers begin avoiding Fujairah or Red Sea facilities?

Does Saudi export capacity decline?

Do Gulf governments increase security around petroleum infrastructure?

Do crude prices respond sharply?

Until something physical changes, this remains a serious threat rather than a new supply outage.

That distinction should guide Australia's response as well.

But the warning itself changes the calculation

Before this threat, the working assumption was that the world could reduce the Hormuz problem by building around it.

Iran has now challenged that assumption.

That is strategically significant even before a shot is fired.

A pipeline around a chokepoint provides security only if the pipeline and its terminal remain outside the conflict.

A port outside Hormuz provides protection only if the war remains inside Hormuz.

Once the geographic boundaries of the conflict expand, the value of those alternatives changes.

The Times View

The world responded remarkably effectively when the Strait of Hormuz became severely disrupted.

It found another way.

Saudi Arabia moved oil towards the Red Sea.

The UAE used Fujairah.

Chinese shipping companies reorganised tanker operations.

Oil was transferred between ships.

Asian refiners found replacement crude.

Iraq began pursuing additional export routes.

The result was expensive and inefficient, but it helped prevent the Hormuz crisis becoming an even greater global energy catastrophe.

Now Iran has threatened the underlying strategy.

Its new security chief, Mohsen Rezaei, has warned that alternative oil transportation routes could be targeted if neighbouring countries participate in Washington's economic campaign against Tehran.

For the moment, it is a threat.

That qualification matters.

But so does the threat itself.

The international energy system has survived because it possessed alternatives.

Hormuz was disrupted, but not every route out of the Middle East was disrupted at the same time.

If that changes, the economics change with it.

Australia is thousands of kilometres away, but we sit at the end of these international petroleum supply chains.

Asian refineries need crude.

Australia needs their petrol, diesel and aviation fuel.

Australian trucks, farms, mines and aircraft need those products.

And Australian consumers ultimately pay for the increased costs that accumulate along the way.

The question therefore used to be:

Can the world get enough oil through Hormuz?

Then it became:

Can the world get enough oil around Hormuz?

Iran has now introduced a more troubling question:

What happens if the routes around Hormuz become targets too?

For Australia, the answer could eventually be measured in fuel prices, freight costs and inflation.

That makes the next move considerably more important than the latest threat.