Attack Risks Rise for Tankers as Iran Vows to Block More Hormuz Routes

What new threats are tankers facing as they try to pass through or around the Strait of Hormuz?

Tankers face a wider range of dangers as they carry oil through or around the Strait of Hormuz. Iran has warned that it may block routes it has not authorized. The reported threats include missile and drone attacks, as well as boats sent to frighten ships away. This raises both physical and commercial risks.

A recent example involved the chemical tanker Acers. Projectiles struck it about 51 nautical miles off Qatar, causing minor crew injuries. Iran has also warned regional countries that opening new oil-export routes would be considered hostile. Gulf producers have therefore used routes close to Oman, then transferred oil offshore with US aerial support.

The latest attacks have discouraged shipowners from using the strait. The risk could spread across approaches to Qatar, Bahrain, Saudi Arabia, Kuwait, and Iraq. Fewer tankers and shrinking accessible oil stocks could make supply disruptions more damaging and increase pressure on prices and fuel costs.

What is the Strait of Hormuz, and where is it located?

The Strait of Hormuz is a narrow waterway connecting the Persian Gulf with the Gulf of Oman and the wider Arabian Sea. It lies between Iran on its northern side and Oman and the United Arab Emirates on its southern side. The passage is strategically important because ships carrying oil must use constrained maritime approaches.

The Reuters report focuses on tankers moving through this waterway and on alternative channels near Oman. Gulf oil producers have rushed shipments through routes hugging the Omani side of the strait. They then transfer oil in open waters in the Gulf of Oman, with aerial support from the United States.

Its geography makes threats especially significant. Iran does not need to control every surrounding coastline to endanger shipping in or near the passage. Missile, drone, and small-boat activity can intimidate crews, force rerouting, and delay exports. Those disruptions can affect markets far beyond the region.

How much of the world’s oil supply normally passes through the Strait of Hormuz?

About one-fifth of the world’s petroleum supply normally passes through the Strait of Hormuz, according to widely used energy-market estimates. The Reuters article does not give this percentage, so this figure comes from established energy-industry knowledge. The key point is that the waterway carries a very large share of globally traded oil.

When tankers avoid the passage, exporters must use slower, less direct routes or transfer cargo offshore. The article describes Gulf producers sending oil along the Omani side before transferring it in the Gulf of Oman, with US aerial support. These workarounds can preserve some exports, but they add operational complexity and security exposure.

The article reports that accessible global oil storage is running low amid unprecedented supply disruptions. A sharp fall in tanker traffic could therefore intensify scarcity, push prices upward, raise transport and fuel costs, and spread economic pressure well beyond the Gulf.

Why can Iran threaten ships and routes in the strait even when it does not control every coastline around it?

Control over a narrow maritime passage does not require ownership of every coastline around it. Iran sits beside the Strait of Hormuz and can use nearby military forces to threaten vessels entering, leaving, or approaching the waterway. The article reports that Iran has plans to block routes it does not authorize and intends to maintain a policy of fear and threats.

The reported mechanism is coercion. Iran could launch missile or drone attacks on ships, or send boats to scare them away. It has also warned regional governments that opening new oil-export routes would be considered hostile. These threats can change shipping decisions even when attacks are limited.

The result is influence over commercial behavior rather than complete territorial control. Shipowners may avoid the strait, insurers and operators may reassess risks, and exporters may rely on more complicated routes. The article says recent Iranian attacks have already dampened shipowners’ appetite for sailing through Hormuz.

What alternative routes or methods can Gulf countries use to export oil if ships avoid the main passage?

Gulf oil producers can reduce dependence on the main passage by using routes along the Omani side of the Strait of Hormuz. They can also move oil through channels that approach the Gulf of Oman rather than sending every tanker through the most threatened waters. The goal is to keep exports moving while reducing exposure to attacks.

The article gives a specific method. Producers rush oil through channels hugging Oman, then transfer it to other vessels in open waters in the Gulf of Oman. US aircraft provide aerial support during these operations. This is not a simple replacement for normal tanker traffic. It involves extra transfers, coordination, and security measures.

Such alternatives may preserve part of the flow, but they do not eliminate danger. Iran has warned that attempts to open new oil-export routes would be hostile. The article says it may block routes with missiles, drones, or boats, meaning alternative channels could also become targets and raise shipping costs.

What happens to oil prices, fuel costs, and the wider economy when tanker traffic through a major oil route falls sharply?

A sharp fall in tanker traffic through a major oil route can reduce the amount of oil reaching global buyers. Markets respond to the risk of tighter supply, especially when accessible inventories are already low. Prices may rise before a complete shortage develops because traders and companies pay more to secure cargoes and manage uncertainty.

The article describes several channels for this pressure. Governments and energy companies have drawn oil from stockpiles to ease unprecedented supply disruptions. Gulf producers are also using more complicated routes, offshore transfers, and aerial support. These measures can keep supplies moving, but they may require more time, fuel, protection, and insurance.

The effects reach beyond crude markets. Maersk increased its emergency fuel surcharge on inland transport in the UK and Ireland because of the conflict. Higher fuel and shipping costs can pass through supply chains, while scarce oil stocks make the global economy more fragile and put additional upward pressure on prices.

What is a maritime chokepoint, and why can disruption at one narrow waterway affect economies far beyond the region?

A maritime chokepoint is a narrow or constrained sea passage through which many ships and vital goods must travel. It matters because shipping cannot easily disperse when the route is threatened. A small area can therefore influence a much larger trade network, especially when replacement routes are slower, harder to protect, or unable to handle the same volume.

The Strait of Hormuz illustrates this mechanism. Tankers carry critical oil shipments through or near the passage. Iran’s reported threats include missiles, drones, and boats, while Gulf producers are responding with Omani-side routes and offshore transfers. Each workaround requires additional coordination and security, and each may still face threats.

The wider effects are economic. The article reports low accessible oil storage, upward pressure on prices, and a higher fuel surcharge for inland transport in Britain and Ireland. A sea conflict can therefore affect energy markets, transport bills, companies, and households far beyond the waterway itself.

Key Facts:

📌 Iran threatens missile, drone, and boat actions against ships.

📌 Projectiles struck tanker Acers near Qatar.

📌 Tanker traffic reached its lowest level in over two months.

📌 The Strait of Hormuz links the Persian Gulf and Gulf of Oman.

📌 Iran lies north of the strait.

📌 Oman and the United Arab Emirates lie south of it.

📌 About one-fifth of global oil supply normally crosses Hormuz.