Hormuz Tanker Traffic Hits Two-Month Low as Attacks Surge

What changed in tanker traffic through the Strait of Hormuz, and how were renewed attacks connected to that change?

Tanker traffic through the Strait of Hormuz dropped sharply after renewed attacks on vessels. Kpler counted only seven commodity carriers crossing on Tuesday, the lowest total since late July. This matters because fewer ships can signal greater danger, disruption, or reluctance among operators, even when measured oil flows appear to recover.

Crude crossing the strait fell 27% from the previous week’s wartime high, reaching at least 10.1 million barrels per day. Kpler said that level matched the September average but represented only 74% of the pre-war level. The steepest decline involved vessels used for ship-to-ship transfers in the Gulf of Oman.

Between September 28 and October 2, the Joint Maritime Information Center recorded at least 12 attacks on tankers carrying crude, liquid petroleum gas, and liquefied natural gas. The JMIC said the actions showed Iran’s intent to maintain pressure on vessels. Continued attacks could make traffic and energy flows more uncertain.

What is the Strait of Hormuz, and why is it an important route for oil and liquefied natural gas?

The Strait of Hormuz is a narrow maritime passage at the entrance to the Persian Gulf. Ships use it to move energy cargoes between Gulf producers and customers elsewhere. Its geography concentrates large volumes of trade into one route, so attacks or delays there can affect many shipments at once.

The article says Hormuz handled a fifth of global oil flows before the war. It also carried a significant share of liquefied natural gas, or LNG. Tankers carrying crude oil, liquid petroleum gas, and LNG were among the vessels targeted in attacks reported between September 28 and October 2.

That combination makes Hormuz strategically important. A decline in crossings can indicate rising shipping risk, even if some cargoes continue moving. Kpler reported that oil flows were gradually returning toward pre-war levels, but tanker movements fell to a two-month low. The route therefore remains active but vulnerable.

How much oil normally passes through the Strait of Hormuz, and how does the reported 10.1 million barrels per day compare with pre-war levels?

Before the war, the Strait of Hormuz handled about one-fifth of global oil flows, according to the article. That makes its normal throughput much larger than the latest reported figure. The exact pre-war daily volume is not given, but the article provides a direct comparison: 10.1 million barrels per day equaled 74% of the pre-war level.

Kpler analysts said crude crossing the strait fell 27% from a wartime high the previous week. They measured at least 10.1 million barrels per day. Kpler also described this as back to the September average, while noting that it remained well below the pre-war benchmark.

The figures show a mixed picture. Oil flows had been improving toward the end of September, but traffic was still only three-quarters of its former level. The gap matters because reduced movement through a major energy route can leave global buyers more exposed to delays, higher costs, and further disruption.

What are ship-to-ship transfers, and why has Saudi Arabia used them to keep exporting crude during disruptions?

Ship-to-ship, or STS, transfers occur when cargo is moved directly from one vessel to another at sea. They can shift oil between larger export tankers, feeder vessels, or ships positioned outside a dangerous route. The article identifies STS as a way Saudi Arabia increased crude exports during disruption.

Saudi Arabia ramped up these transfers in the Gulf of Oman. That location helped its cargoes continue moving while tanker traffic through Hormuz weakened. Kpler analysts said the most marked decline in tanker movements involved vessels engaged in STS operations, showing how important this method had become to the wider export pattern.

Kpler described Saudi Arabia’s STS activity as instrumental in the recovery of overall oil flows from the Persian Gulf. The method does not remove the security risk, because ships still operate in exposed waters. However, it can provide flexibility by separating cargo movement from a single vessel’s passage through the most threatened section.

What could happen to oil, gas, shipping costs, and energy security if attacks continue to reduce traffic through the strait?

Continued attacks would likely make operators more cautious about sending tankers through Hormuz. Fewer crossings could slow deliveries of crude, petroleum gas, and LNG. Because the strait carried a fifth of global oil flows before the war, even a partial disruption could create wider uncertainty for buyers and sellers.

The immediate mechanism is risk. Shipowners may seek safer routes, delay voyages, or demand higher freight and insurance payments. Longer journeys can also consume more fuel and reduce available tanker capacity. Those pressures can raise delivered energy costs, while traders may react to the possibility of shortages before supplies actually fall.

The article shows that traffic already dropped to seven commodity carriers on Tuesday, while crude flows were 74% of their pre-war level. If that pattern persists, energy security could weaken for countries dependent on Gulf shipments. Producers may rely more on STS transfers and other routes, but those options may not fully replace Hormuz.

What alternative routes or transport methods can oil and gas producers use when ships face danger in the Strait of Hormuz?

When ships face danger in Hormuz, producers can combine several alternatives. Oil may move through pipelines to ports outside the immediate chokepoint, while stored cargoes can be released later. Smaller vessels can also carry cargo to safer transfer areas, where larger tankers take it onward. These options depend on available infrastructure and capacity.

The article provides one concrete example: Saudi Arabia increased crude exports through ship-to-ship transfers in the Gulf of Oman. STS moves cargo between vessels, allowing exporters to adjust how and where shipments are assembled. Producers may also reroute vessels around longer maritime paths, although that usually adds time, fuel use, and cost.

For gas, alternatives are more limited when cargo is already destined for LNG shipping. Producers can use pipeline networks where connections exist, redirect LNG cargoes through other ports, or draw on storage. The article does not identify specific pipelines or replacement routes. It does show that STS helped restore overall Persian Gulf oil flows despite weaker tanker movement.

Why are narrow maritime chokepoints like Hormuz so important to the global energy system, in which oil and gas are produced in some regions but consumed around the world?

Narrow maritime chokepoints matter because large energy volumes must pass through limited navigable space. Producers may be located near the Persian Gulf, while consumers are spread across continents. A chokepoint connects those sides efficiently, but it also concentrates risk. Delays, attacks, or closures can affect many cargoes at once.

Hormuz illustrates this mechanism clearly. The article says the strait handled one-fifth of global oil flows before the war and a significant chunk of LNG flows. When tanker traffic fell to seven commodity carriers, the change affected a route carrying crude, liquid petroleum gas, and liquefied natural gas. Saudi Arabia used STS transfers to keep exports moving.

This concentration links local security to global energy security. Even when oil flows recover toward pre-war levels, falling vessel movements can signal continuing vulnerability. If attacks persist, exporters may need more complicated transport arrangements, while importers face greater uncertainty about delivery timing and costs. The strait’s importance comes from both its scale and its limited alternatives.

Key Facts:

📌 Kpler counted seven commodity carriers crossing Hormuz on Tuesday.

📌 Crude crossings fell 27% from the previous week’s wartime high.

📌 At least 12 tanker attacks occurred between September 28 and October 2.

📌 Hormuz handled a fifth of global oil flows before the war.

📌 The strait also carried a significant chunk of global LNG flows.

📌 Attacked vessels carried crude, liquid petroleum gas, and LNG.

📌 Hormuz handled one-fifth of global oil flows before the war.