Iran War Shipping Update - April 17, 2026

During the Iran War, the Iranian regime’s Ghost Fleet has continued to operate actively — loading cargo, transiting the Strait of Hormuz, and heading east toward its primary buyer, China. The U.S. blockade may now be constraining those exports, as UANI’s shipping updates continue to track the ghost fleet’s illicit maritime movements throughout the conflict.

U.S. Blockade 

On April 7, President Trump announced a two-week ceasefire with Iran. Pakistan mediated ceasefire talks, which President Trump stated was contingent on the “complete, immediate, and safe opening” of the Strait of Hormuz, effectively ending its wartime closure. However, on April 12, after ceasefire talks with Iran ended without an agreement, President Trump announced that the U.S. would initiate a naval blockade of all Iranian ports and coastal areas effective April 13. U.S. Central Command posted that U.S. forces are “executing the mission to blockade ships entering and departing Iranian ports” on April 14. By blockading vessels calling on Iranian ports, including tankers carrying Iranian oil, the administration aims to cut off the Iranian regime’s major source of revenue. The blockade, now implemented, represents a significant escalation in U.S. enforcement strategy, with implications for global energy markets, regional stability, and the future calibration of U.S. sanctions policy.

On April 17, U.S. CENTCOM posted that 19 vessels have turned around without passing through. In the map below, which was presented by the U.S. Joint Chiefs of Staff Chair Gen. Dan Caine on April 16, the red vessels are tankers departing Iranian ports and attempting to pass through, while the blue vessels are U.S. Navy warships.

Map of U.S. blockade from Gen. Caine’s update on April 16 (Credit: U.S. Department of War)

U.S. CENTCOM also shared a video on April 16 of U.S. naval forces diverting a tanker to enforce the blockade on ships entering or departing Iranian ports.

U.S. naval forces diverting a tanker as part of the U.S. blockade on April 16 (Credit: CENTCOM/X)

Status of the Strait of Hormuz

On April 17, Iranian Foreign Minister Abbas Araghchi declared that the Strait of Hormuz is “open” for the remaining period of the ceasefire. However, he said permitted passage remains limited to the coordinated route announced by Iran’s Ports and Maritime Organisation, meaning the international shipping lanes are not fully open.

The Strait of Hormuz therefore remains a critical flashpoint in the Iran campaign. Since the start of the conflict, there have been at least 25 commercial vessels hit, plus four near misses.

The escalating risk has created severe congestion and instability across the Persian Gulf’s shipping lanes. Prior to the outbreak of hostilities, about 138 vessels transited the Strait of Hormuz daily.  Since March 1, 2026, marine traffic data shows growing clusters of loitering vessels on both sides of the Strait of Hormuz, with many refraining from transiting due to safety concerns.

OFAC-sanctioned and UANI-listed tankers — alongside some non-sanctioned, ostensibly legitimate vessels — have transited the Strait of Hormuz intermittently switching off their AIS signals. Many have passed the waterway between Larak and Qeshm islands before continuing through the strait, while a handful of others sailed via Omani waters along Oman’s coastline, creating two parallel transit patterns as shipping adapted to the evolving security environment. So far, there have been no openly transiting vessels through international shipping lanes since the conflict began, raising real questions of when usual patterns will resume as the fragile ceasefire holds.

Numerous vessels that have a history of transporting non-Iranian cargoes from the Persian Gulf are now diverting due to heightened security risks and shipping disruptions in the Strait of Hormuz from the Iran war, causing many to seek alternative cargoes in U.S. ports, such as Galveston.

Iranian Oil-Laden Tankers in the Persian Gulf 

UANI has identified at least 34 tankers laden with Iranian oil — primarily crude — currently operating inside the Persian Gulf, west of the Strait of Hormuz.

Map of Iranian oil laden tankers in the Persian Gulf on April 17

Iran-linked Vessels at Chabahar Port, Iran

Iran-linked tankers and cargo vessels are loitering and anchoring outside of the Persian Gulf at Chabahar Port, Iran. On April 16, there were 8 Iran-flagged tankers and 9 cargo ships all observed by satellite imagery near Chabahar Port.

 Number of Iranian Loadings

Since the outbreak of the conflict, UANI has tracked at least 50 Iranian oil loadings, 26 of which originated from Kharg Island, Iran. These shipments represent approximately 60 million barrels of Iranian oil, generating an estimated revenue of over $5 billion for the IRGC, which continues to fund Iran’s active missile and drone programs central to the conflict. This figure is notably higher than usual given the sharp increase in oil prices, including Iranian crude.

Iran-oil Laden Tankers That Have Left the Persian Gulf

Since the start of the conflict, UANI has observed at least 37 ghost fleet tankers laden with Iranian oil that have left the Persian Gulf — some broadcasting their AIS signals and others operating clandestinely. These tankers are enroute to Malaysia to conduct ship-to-ship (STS) transfers with other ghost fleet vessels bound for China. 

The Iran-flagged tanker DERYA (IMO 9569700) remains close to Jamnagar, India on April 17, openly broadcasting AIS. It is reporting that it is laden with a deep draft of 20 meters. The Iran-flagged tanker FELICITY (IMO 9183934) remains loitering near Jamnagar, India on April 17, also openly broadcasting AIS, after arriving on April 12. Reports indicate these Iranian-oil laden tankers are struggling to discharge cargoes, as Indian refiners consider refusing them amid U.S. sanctions risks. It is also possible that Iranian-flagged merchant ships discharging sanctioned cargo represents a risk to India’s neutral status. 

Iran flagged tankers near Gujarat, India on April 17 (Credit: Marine Traffic)

Iran-flagged Tankers Globally

UANI has also monitored Iranian-flagged tankers operating beyond the Persian Gulf. Since the conflict began, at least 27 Iranian-flagged tankers have reached Southeast Asian waters bound for the Eastern Outer Port Limits (EOPL) anchorage off Johor, Malaysia. On April 17, the Iran-flagged tankers HAWK (IMO 9362061) and SEA CLIFF (IMO 9569657) arrived at the Malaysian EOPL laden with Iranian crude from Kharg Island, where they turn of their AIS signal and conduct clandestine Ship-to-Ship (STS) transfers to another tanker bound for China.

Iran flagged tankers arrive at the EOPL on April 17 (Credit: Marine Traffic)

Meanwhile, at least 30 Iran-flagged tankers have begun returning and reporting empty to Iran from the Malaysian EOPL anchorage and Southeast Asian sea lanes, since the start of the conflict. 

Iran-Oil Laden Tankers off the Malaysian Coast

Since the start of the conflict, UANI has recorded 104 Iranian oil laden tankers in the EOPL anchorage, a ghost fleet hotspot approximately 70 km off Malaysia’s coast. All of these tankers have been spotted in satellite imagery.

On April 17, 24 tankers listed on UANI's Ghost Armada were anchored or loitering in the EOPL area with their AIS signals active. Despite the ongoing conflict, it is business as usual for the Iranian oil trade to China, where ghost fleet tankers continue to operate with impunity across Southeast Asia's sea lanes. 

Iran-Flagged Cargo Ships Globally

The Iran-flagged bulk cargo ships WARTA (IMO 9465849) and MAHNAM (IMO 9213387) both continued their transit westbound of the Malacca Strait on April 17. WARTA, laden with an unknown cargo, departing Sri Racha, Thailand on April 12 is destined for Bandar Imam Khomeini (BIK), Iran, with an estimated arrival time of May 3, according to its AIS signal. Meanwhile, MAHNAM, after departed Dafeng, China, on April 5, is now in ballast condition after delivering its unknown cargo. 
 

Iran flagged cargo ships and tanker transiting the Malacca Strait on April 17 (Credit: Marine Traffic)

The Iran-flagged container ships AZARGOUN (IMO 9283019), departed Deendayal Port, India, on April 17, while ARTENOS (IMO 9283021) remained anchored. In addition, the container ship ARTABAZ (IMO 9283007) arrived at the anchorage outside Mumbai. Like all Iran Shipping Lines (IRISL) containers ships, ARTENOS and AZARGOUN are sanctioned by U.S. OFAC. S 

Iran flagged container ships by the Indian coastline on April 17 (Credit: Marine Traffic)

The Iran-flagged general cargo ship AREZOO (IMO 9165786), another OFAC-sanctioned IRISL vessel, shifted from the anchorage to the container terminal at Port Klang, Malaysia on April 17. It had previously visited Penang, Malaysia on April 15; Yangon, Myanmar on April 11–12; and departed Chittagong, Bangladesh on April 9.

Iran flagged cargo ship arriving in Port Klang, Malaysia on April 17 (Credit: Marine Traffic)

The Iran-flagged, OFAC-sanctioned bulk carrier BAHJAT (IMO 9405954) is making its final approach to Kuantan, Malaysia on April 17 to discharge unknown cargo.

Iran-flagged bulk cargo ship transiting the Southeast Asian sea lanes on April 17 (Credit: Marine Traffic)