Full Breakdown
Sharp Decline in Strait of Hormuz Traffic Amid Ongoing Conflict
By Drooid · · How we work
Core Event: Record Low Vessel Transits
Preliminary ship-tracking data show that only four commodity vessels passed through the Strait of Hormuz on September 16, down from seven the previous day and far below the pre-war daily average of 125-140 ships. The next day, September 18, the count fell to four again, while September 17 recorded just three transits. These figures are well under the 10-day moving averages of 16-18 vessels reported by the same data sources.
Background & Context
The strait, a 21-nautical-mile passage linking the Persian Gulf with the open ocean, historically carries about one-fifth of global oil and gas shipments. Since the outbreak of the U.S.–Israeli war with Iran on February 28, commercial traffic has been disrupted by missile and drone attacks, Iranian restrictions, and Houthi operations in the Red Sea.
Data & Statistics
- September 16: 4 vessels (2 entering, 2 exiting) – no VLCCs or LNG carriers.
- September 17: 3 vessels (1 empty Supramax bulk carrier, 1 empty petroleum-product tanker, 1 Panamax tanker).
- September 18: 4 vessels (2 Panamax tankers, 1 Supramax ship, 1 Kamsarmax vessel).
- 10-day averages: ~16-18 vessels.
- Pre-war daily traffic: 125-140 vessels.
- U.S. CENTCOM claims assistance to commercial vessels moving more than 900 million barrels of crude oil since early May.
Official Statements & Responses
U.S. Central Command (CENTCOM) says the strait remains open for commerce. Spokesperson Captain Tim Hawkins noted U.S. forces are conducting two simultaneous missions: facilitating commercial traffic while enforcing a blockade against vessels attempting violations.
Iranian authorities have accused commercial tankers of striking naval mines in prohibited zones. The Iranian Revolutionary Guard claimed an oil tanker hit a mine, while the U.S. military disputed this, attributing damage to an earlier Iranian missile and a later drone attack.
Conflicting Reports & Gaps
- Traffic vs. Openness: U.S. officials describe the waterway as “open,” yet independent tracking shows single-digit daily transits, suggesting operators view the route as unsafe.
- Tanker Attack Accounts: Iran alleges a mine strike; the U.S. attributes the damage to missile and drone attacks. No independent verification has been provided.
- AIS Visibility: Vessels may switch off Automatic Identification System transponders, meaning actual traffic could be higher than reported, but the extent of this “dark” traffic remains unknown.
Why It Matters
The reduction in strait usage threatens global energy markets, as the corridor moves a substantial share of oil and LNG. Lower traffic raises insurance premiums, rerouting costs, and market volatility, potentially prompting reliance on alternative routes such as the Bab el-Mandeb Strait or passages around the Cape of Good Hope.
Verbatim Quotes
- “Since early May, we have assisted commercial vessels moving more than 900 million barrels of crude oil through the Strait of Hormuz to the global energy market,” — Tim Hawkins, US navy captain
- “We have redirected more than 100 ships that were trying to violate the blockade,” — Tim Hawkins, US navy captain
What's Next
U.S. officials have indicated ongoing vigilance and continued enforcement of the blockade, but no specific future dates for diplomatic negotiations or de-escalation measures have been announced.